Meter Operations Code of Practice and Safe Working Methods

METER OPERATIONS CODE OF PRACTICE AND SAFE WORKING METHODS

Number………………………………………………..

Issued to………………………………………………

Signature……………………………………………...

Date…………………………………………………….

THIS IS A CONTROLLED DOCUMENT It is the property of Siemens Operational Services

Authors: - Technical Field Services

Issued by: -

Issue Date: -

Issue Medium

Hard copy

Electronic Copy

This signed copy to be held in central records

METER OPERATIONS CODE OF PRACTICE AND SAFE WORKING METHODS

Number………………………………………………..

Issued to………………………………………………

Signature……………………………………………...

Date…………………………………………………….

THIS IS A CONTROLLED DOCUMENT It is the property of Siemens Operational Services

Authors: - Technical Field Services

Issued by: -

Issue Date: -

Issue Medium

Hard copy

Electronic Copy

Contents: Issue Control Sheets Page 3

Contents Page 5

Definitions Page 10

Section 1 Introduction, Related Policies and Environment

1.1 Siemens Operational Services Policy Page 15

1.2 Copyright Page 15

1.3 Code of Practice Page 15

1.4 The Company Role Page 16

1.5 Competent Person Page 16

1.6 Environment Page 16 Section 2 Health and Safety

2.1 Reporting of Accidents and Incidents Page 19

2.2 Near Miss – Hazards Page 19

2.3 Reporting of Distribution Defects Page 20

2.4 Risk Assessment Page 20

2.5 Prevention of Electric Shock Page 20

2.6 Field Safety Alerts Page 21

2.7 Ladders and Steps Page 21

2.8 Tools and Equipment Page 21

2.9 Testing Devices and Instruments Page 21

2.10 Portable Electric Tools Page 22

2.11 Portable Appliance Testing Page 22

2.12 Personal Protective Equipment Page 22

2.13 Insulated Gloves Page 22

2.14 Safety Helmets Page 23

2.15 Eye Protection Page 23

2.16 Protection Against Excessive Noise Page 23

2.17 Respiratory Protection Page 24

2.18 Footwear Page 24

2.19 High Visibility Clothing Page 24

2.20 Work Wear Page 24

2.21 COSHH (Control of Substances Hazardous to Health) Page 24

2.22 Asbestos Page 25

2.23 Building and Construction Sites Page 25

2.24 Idle Services Page 26

2.25 Labels, Stickers and Cards Page 27

Contents:

Section 3 Basic Electrical Safety Requirements

(Single and Multi Phase)

3.1 Single Phase Page 29

3.2 Multi Phase Page 32

3.3 Sealing of Metering Equipment Page 35

Section 4 Testing

4.1 Visual Inspection and Responsibilities Page 37

4.2 Polarity Testing Page 37

4.3 Proving Dead Page 38

4.4 Working at Outside Meter Positions Page 38

4.5 Insulation Resistance Testing Page 40

4.6 Visual Earthing Check Page 40

4.7 Phase to Earth Loop Impedance Test Page 40

4.8 Phase Sequence Check Page 41

4.9 Fault Diagnosis (Timing Devices and Contactors) Page 41

4.10 De-energisation of Service Page 41

4.11 Disconnection and Removal of all or Part of Metering Equipment Page 42

4.12 Temporary Supplies (Areas of Special Risk) Page 43

4.13 Suspected Interference at the Meter Position Page 43

4.14 Approved Testing Devices for Voltage and Polarity Page 44

4.15 Glow Test for Single and Multi Phase Installations Page 45

4.16 One Fuse Test For Multi Phase New and Existing Installations Page 47

4.17 Phase Rotation Test Page 48

4.18 Testing Phase to Neutral and Phase to Phase across Multi Phase Terminals with Approved Test Lamp Page 49

4.19 Testing sequence at a cut out using an approved test lamp on both TNC-S and TN-S Earthing Systems Page 50

Contents:

Section 5 Layouts and Making Connections to Metering Equipment

5.1 Terminating Cables Page 53

5.2 Square Clamp Connections Page 54

5.3 Cables Page 55

5.4 Neutrals Direct into Meter Page 56

5.5 Harmonisation of Cable Colours Page 57

5.6 Standard Layouts for Whole Current Metering Page 58

5.7 Layout of Meter Boards Page 58

5.8 Meter Boards Page 58

5.9 Outdoor Meter Cupboards Page 59

5.10 Damaged Meter Boxes Page 59

5.11 Standard Layout for a Single Phase Meter Position Page 60

5.12 Standard Layout for a Multi Phase Meter Position Page 61

5.13 Load Research and Energy Efficiency Equipment (Connected) Page 62

5.14 Fuse Rating Page 62

5.15 Rising Main Installations and Pre-Payment Meters (Debt Collection Devices) Page 63 5.16 Checking Meter Tolerance / Accuracy Page 63 5.17 Connection of Check Meters Page 64 5.18 Connection of Single Phase Check Meters Page 65 5.19 Connection of Multi Phase Check Meter Page 66 5.20 Single Phase Whole Current Sub-Metering Page 67 5.21 Multi Phase Whole Current Sub Metering Page 68 5.22 Multi Way Distribution Boards (Feeding Sub Mains and Meters in Remote Locations) Page 69 5.23 Intake Rooms Page 70 5.24 Import / Export Metering Principles Page 71 5.25 Half and Full Clarke Cabinets Page 74 5.26 Connection of Earthing Systems to Cut Outs Page 75

Contents:

Section 6 CT Operated Commissioning Procedure

6.1 Compliance Requirement Page 77

6.2 General Commissioning Principles Page 77

6.3 Working Practices Page 77 6.4 Commissioning Procedure Page 78 6.5 Meter(s) Configuration and Operation Page 78 6.6 Load Comparison Test Result Page 79 6.7 Customer Pulsing Consideration Page 79

6.8 Operations Effecting Pulse Outputs or Data Streams Page 79

6.9 Code of Practice Compliance Page 79 6.10 Typical Example of CT Operated Metering (Diagram 1) Page 80 6.11 Typical Example of CT Operated Metering (Diagram 2) Page 81 6.12 Isolating LV Cubicles Page 82 6.13 Presence of Voltage on LV Test Block Page 82

Section 7 Safe Working Methods Whole Current

7.1 General Risk Assessment at the Meter Position Page 85 7.2 General Risk Assessment at the Meter Position and cut out (Before Work Commences) Page 86 7.3 Working on Single and Multi Phase Cut Outs Page 87 7.4 Changing Single Phase Meters Where Access is Gained Page 92

7.5 Changing a Single Phase Meters Where No Access Page 95

7.6 Installation of Single Phase Meters to an Energised Service (New Connection) Page 98 7.7 Changing Multi Phase Meters Where Access to Installation Is Gained Page 101 7.8 Installation of a Multi Phase Meters to an Energised Service

(New Connection) Page 105

7.9 Changing a Single Phase Meter Where the Cut Out is Remote from the Meter Position Page 108 7.10 Reconnection of Single Phase Meter Page 112 7.11 Reconnection of Multi Phase Meter Page 115 7.12 Changing a Single Phase Meter to an Import / Export Meter

Where Access is Gained Page 119 7.13 Changing a Multi Phase Meter to an Import / Export Meter Where Access is Gained Page 122 7.14 Installation of Single Phase Whole Current Sub- Meter Page 126 7.15 Installation of Multi Phase Whole Current Sub-Meter Page 130 7.16 Installation of Check Meter Page 134

7.17 Removal of Check Meter Page 139 7.18 De-energisation and Removal of Metering Equipment Page 144 7.19 Gas Escape Procedure Page 148 Restricted Page 7 © Siemens Operational Services 2009 – 2014 All rights reserved Version 2

Contents:

Section 8 Safe Working Methods CT Operated Metering

8.1 Installation and Replacement of GSM Modems Page 151

8.2 LV CT Operated Meter Install or Change to Panel Only Page 152

8.3 Installation of LV CT Chamber/Cabinet and CTs Page 154

8.4 Installation of LV Metering Terminal (T) Box Page 157

8.5 Installation of HV Metering Terminal (T) Box Page 159

8.6 HV VT/CT Operated Meter Install or Change to Panel Only Page 161

8.7 COP 4 Testing OF HV and LV Meters Page 163

8.8 Installation of Half Hourly Sub Meter Page 165

Appendices

Appendix 1 Impact of EU Harmonisation of Cable Colours Page 167 Appendix 2 National Doorstep Protocol Page 169

Appendix 3 Management of Meter Stocks within the Field Page 171

Please note: This document is subject to regular review and therefore the issue status cannot be considered as “latest” when printed.

Definitions

AIRline accident and incident reporting system.

Associated Equipment not the meter e.g. connector block – time switches – contactors – isolators – time switch fuses.

Back Feed when a conductor becomes live after the main point of isolation.

Barrier a part providing a defined degree of protection against direct contact with live equipment.

BEBS S12 (ENA 50-19) Standard Wiring Code Numbers

BNO Business Network Owner

Bunched cables are said to be “bunched” when two or more are connected into the same terminal of the meter or associated equipment.

Cold Calling calling with no prior customer notification or soft call period has expired.

Conductor a cable connected to a meter or associated equipment.

Control Measure something put into place to reduce or eliminate the risk .

Cut Out normally the main point of isolation provided by the Network Owner.

Dead at or about earth potential and disconnected from any LIVE SYSTEM.

Debt Collection Device (DCD) a prepayment meter usually installed/connected remotely from the source of supply and the billing meter.

Diversity allowance of over current for short periods of time that does not affect the safe operation of the installation

DNO Distribution Network Operator

Earth Terminal a terminal located at the incoming service position for connecting the earth continuity conductor.

Earth Conductor Customer’s main earth electrode that is connected either to the PME earth terminal, lead sheath of the main incoming cable or customers earth electrode.

ECO Emergency Connection Order

ESQC Regs Electricity Safety, Quality and Continuity Regulations

Fuse a device designed to rupture when excess current flows exceeding the fuse rating over a period of time.

Gemserv The industry regulatory authority

Hazard something, which has the potential to cause harm, injury or loss.

HH half hourly (normally commercial and industrial)

HHDC Half Hourly Data Collection

HRC High Rupturing Capacity

Idle Service when the incoming cut out/metering installation is in a live state and the installation is vacant.

Insulation suitable non-conducting material enclosing, supporting or surrounding a conductor.

Live electrically charged.

MDT Mobile Data Terminal

Metering Fuses local isolation for CT operated meters

MICC Mineral Insulated Copper Covered cable

MOCOPA Meter Operations Code of Practice Agreement

Multi Head multi-way distribution board, e.g. Ryfield, Bemco, MEM

Neutral the conductor which is connected to the neutral or mid point of the distribution system.

Neutral (borrowed) situation where a neutral conductor has been connected from an adjacent source but not directly from the main neutral point.

NHH non half hourly (normally domestic and light commercial)

HSE Health and Safety Executive

OS Siemens Operational Services (the Company)

PME Protective Multiple Earthing (TN-C-S)

Polarity (Correct) where the live and neutral conductors have been correctly connected.

Polarity (Incorrect) where the live conductor has been connected to a neutral terminal and the neutral conductor has been connected to a live terminal.

Polyphase an installation that is connected to two or three phases and neutral of a 4-wire system or to a single-phase three-wire system.

PSCC Prospective short circuit fault current that will only be limited by the impedance of the cable size/fuse characteristics.

P&SA Pooling and Settlements Agency

PSI Phase Sequence Indicator

Rising Mains service cables with independent over-current and isolation points normally feeding blocks of flats and split at the source of supply. (NB: can be independently owned)

Risk the likelihood of the hazard causing harm, injury or loss.

SNE Separate Neutral Earth (TN-S)

Soft Calling customer has received a letter with prior notification within a specific time period

SSA Settlement Systems Administrator

SSC Standard Settlement Configuration

Supply Cubicle a point of isolation for large supplies

SWA Steel Wire Armoured cable

TMO Technical Meter Operative

TN-C-S PME method of earthing

TN-S Cable sheath method of earthing

TT Customer own earthing system providing an RCD and earth electrode for fault protection

UMetS Utility Metering Service Providers

VIR Vulcanised Indian Rubber

Section 1

Introduction, Related Policies and Environment

1.1 SIEMENS OPERATIONAL POLICY

It is the policy of the Company that any person including contractors/sub contractors undertaking the work or activity shall: x have the appropriate competence, network authorisation and understand any related documents and procedures; x understand the Safe Working Methods within this Code of Practice. x understand the dangers that might arise and the precautions to be taken over the whole period of the work or activity.

This Policy requires that all persons at work: x are adequately trained, assessed, instructed and supervised; x are competent to avoid the dangers that can arise during the work they are carrying out; x observe the relevant legal requirements and other required health and safety precautions at all times.

Individuals are expected to:

x work to high standards of integrity and honesty in all activities undertaken on behalf of the Company and in all dealings with other employees, customers, suppliers, competitors and members of the public.

1.2 COPYRIGHT

This document is copyright to Siemens Operational Services. Unauthorised reproduction is prohibited.

1.3 CODE OF PRACTICE

Compliance with this Code of Practice will ensure that the Company is fulfilling its obligations as a Meter Operator in respect of The Registration Authority (Gemserv), as well as meeting the requirements of The Meter Operation Code of Practice Agreement (MOCOPA).

This document is the property of the Company and where hard copies are issued they shall be signed for on receipt. It is the responsibility of the recipient to keep it in good condition and to ensure that it is kept up to date. It must be returned when the recipient leaves the employment of the Company or on completion of work on behalf of the Company.

This Code of Practice is maintained and controlled by Meter Operations and the master version will always be held in the Health and Safety Management System.

1.4 THE COMPANY ROLE

Meter Operator – Providing metering services to energy suppliers, customers and distributors.

1.5 COMPETENT PERSON

Competent Person: To be deemed competent, you must:

x Be trained and assessed in, and successfully complete the relevant skills technical training programme.

x Be fully conversant with the nature and extent of the work to be done. x Comply with this Code of Practice when carrying out work, whether instructions are issued verbally or in writing.

x Understand and comply with the relevant sections of the OS Electricity Safety Rules. x Use approved safe methods of work, safe means of access and the Personal Protective Equipment and clothing provided for your safety.

x Be in possession of the appropriate network authorisation/competency certificate for the area to be worked in

To work in substations another level of authorisation is required and is gained through the appropriate training and assessment applicable to the distribution network area.

1.6 ENVIRONMENT

Siemens Operational Services operate an Environmental Management System, in accordance with ISO 14001:2004 registration. The main impacts on the environment have been established and targets have been set up to ensure that we monitor and improve our performance. It is also very important that we comply with environmental legislation at all times.

Waste

We have a duty of care to ensure that our waste is being managed appropriately and in accordance with the law by:

x ensuring that all waste is removed from customer's premises and correctly disposed of x not dropping any litter in public places x recycling wherever possible (i.e. using recycling facilities whilst on office sites)

CO² Emissions

The vehicle fleet and travel are our largest contributors to our overall CO² emissions, together with energy use in offices. An attempt to reduce these can be by:

x keeping our driving speed at fuel efficient levels x conducting regular vehicle checks and ensuring on time servicing of vehicles x vehicle sharing for the attendance of meetings, if possible x making use of conference call facilities x switching off PC's at night and unnecessary lights

Section 2

Health and Safety

Health and Safety at Work etc Act 1974

The Health and Safety at Work etc Act 1974 places a duty upon employers to ensure, so far as is reasonably practicable, the Health Safety and Welfare of employees whilst at work. It also places duties on every employee whilst at work to take care for the health and safety of themselves and other persons who may be affected by their acts or omissions. Every employee is also required to co-operate with their employer, or any person, so far as it is reasonably practicable, to enable that employer or other person, to discharge the duties or requirements imposed by the Act. Therefore all methods and procedures referred to in this Code of Practice must be implemented and are mandatory.

In addition to this, sections 7 and 8 of the Health and Safety at Work etc Act 1974 clearly define the responsibilities of all employees. It shall be the responsibility of every employee while at work to:

Section 7

x Take reasonable care for the safety of themselves and of others who may be affected by their acts or omissions at work. x Co-operate with their employer as far as is necessary to enable their employer to comply with statutory legislation.

Section 8

x No person shall intentionally or recklessly interfere with or misuse anything provided in the interests of health, safety or welfare at work.

2.1 REPORTING OF ACCIDENTS AND INCIDENTS

All accidents and incidents which occur whilst working for the Company must be reported to AIRline as soon as possible after the event. All accidents/incidents must be recorded and investigated in accordance with the requirements of the Health and Safety Management System.

2.2 NEAR MISS - HAZARDS

Near miss or significant hazards encountered whilst working for the company should be reported to AIRline. Line Managers are responsible for carrying out any necessary investigations in accordance with the requirements of the Health and Safety Management System.

2.3 REPORTING OF DISTRIBUTION DEFECTS

All Distribution defects encountered should be reported to AIRline, for remedial action by the Distribution Network Operator. Defects may include:

x Cut out x Meter or associated equipment x Meter board (including cement based asbestos) x Service cable x Signs of interference

2.4 RISK ASSESSMENT

Before commencing any metering task the hazards associated with the work must be identified, the associated risk evaluated and the appropriate control measures implemented. Special care must be taken if distracted from the task in hand. Risks must be continually assessed while carrying out the work.

2.5 PREVENTION OF ELECTRIC SHOCK

Work on all live service/meter positions with conductors and/or live terminals shall not be carried out with the exception of testing, Working Live is not permitted, the main cut out fuse MUST always be removed before any work commences. Company approved insulated gloves and eye protection MUST be worn when removing and inserting fuse carriers in all cut outs or whenever there is a possibility of receiving an electric shock through hand contact with electrical circuits. (Refer to section 2.12). All live terminals must be shielded where possible. Additional authorisations through competency training for working live (i.e. 1 – 4 listed below) can be found in the OS Electricity Safety Rules. All work shall be carried out on equipment and apparatus that has been PROVED DEAD by means of an approved Test Lamp, which the operation of MUST be proved before and after use.

Authorised staff may undertake the following Live working: 1. Checking tightness of Live screw connections during post visit Quality checks where the supply cannot reasonably be turned off. 2. Removal of Neutral and main earth conductors from PME type cut outs with a reverse polarity. 3. Shorting out current transformers on HV/LV metering systems. 4. Calibrating, testing and commissioning via a generator or mains supply.

2.6 FIELD SAFETY ALERTS

When a significant safety hazard is identified in the field, a Field Safety Alert will be issued to all relevant staff and discussed in detail at local Team Talks. The Field Safety Alert may refer to a specific item of equipment e.g. a type of metal clad cut out. The information contained within a Field Safety Alert must be adhered to and may overrule this Code of Practice.

2.7 LADDERS AND STEPS

Only company issued steps and ladders must be used in line with company procedure. All steps and ladders must be visually checked by the Operative before use and must carry a current inspection label and be in date. If steps or ladders are not fit for the task, contact a Line Manager who will advise accordingly.

Ladder work is permitted as long as company procedures are followed and in line with HSE guidance.

2.8 TOOLS AND EQUIPMENT

Only company approved and supplied tools and equipment can be used. All tools and equipment should be thoroughly checked prior to use to ensure that they are in good condition and safe to use. Any tools or equipment that are damaged or otherwise unsafe to use must be withdrawn from service and replaced.

All insulated tools must be stored in clean dry conditions and in such a manner that the risk of damage to the insulation is minimised. Insulated tools must be inspected before use to identify cracks and other visual signs of damage to the insulation, which may affect its insulating properties and therefore its safe use. No employee is to “cut back” the insulation on any tools. It is the responsibility of the Operative to maintain and keep their tools in a serviceable condition.

2.9 TESTING DEVICES AND INSTRUMENTS

Voltage testing devices must be used with due care and attention (including test lamps). Correct operation of each instrument as well as operator safety depends on the insulation being kept in good condition at all times. Fused leads must be used with all

voltage testing equipment and instruments must be within calibration in line with agreed Company procedures.

Before an instrument is applied to any conductor, the operator must ensure that the voltage range of the device is suitable for the particular system to be tested. In the case of a test lamp this must be proved before and after use.

No instrument shall be used that is not “in date” and therefore doesn’t have a current certificate of calibration (test results are invalid). The instrument must be immediately returned to the appointed agent for calibration.

2.10 PORTABLE ELECTRIC TOOLS

All battery operated tools will be supplied by the Company where required and it is the responsibility of the Operative to maintain and report defects to a Line Manager. Under no circumstances must a battery-operated tool be used on any terminals of a cut out.

Faulty or redundant batteries must be disposed of in line with current Company environmental procedures.

2.11 PORTABLE APPLIANCE TESTING

Portable appliances and equipment need to be tested on a regular basis and will be part of a planned inspection and maintenance program. Line Managers are responsible for ensuring that portable equipment is in date. Meter Operatives are responsible for reporting any defective equipment to a Line Manager.

2.12 PERSONAL PROTECTIVE EQUIPMENT (PPE)

Company approved PPE must be worn in all cases where there is a risk of injury or mandatory signs instruct you to wear them. Additional PPE may be required to comply with site specific requirements.

2.13 INSULATED GLOVES

Approved company issued insulated gloves MUST be worn in accordance with the safe working methods within this Code of Practice and DNO specific requirements. Both gloves must be worn to prevent direct and indirect electrical contact when working on all types of domestic and industrial cut outs.

Approved insulated gloves should not be exposed unnecessarily to heat or light or allowed to come into contact with oil, grease, turpentine, white spirit, strong acid or other corrosive substances. When gloves become soiled they should be washed in warm soapy water and left to dry. Periodically the gloves MUST be inflated in order to check for air leakage and to carry out a visual inspection. In the event of any leakage, deterioration or wear, a replacement pair must be obtained and the old gloves returned for disposal. These gloves are for electrical safety only.

2.14 SAFETY HELMETS

Safety helmets MUST be worn when working on construction sites, where mandatory signs enforce it and at all other times when there is a foreseeable risk of head injury. Helmets should be stored in a PPE bag when not in use. It should be inspected before use to check for defects, particularly small cracks. As a minimum requirement, helmets must be replaced after 5 years. (See inside helmet for manufacturing date).

2.15 EYE PROTECTION

Eye protection MUST be worn when working on all domestic and industrial type cut outs or when carrying out tasks that involve a risk of eye injury. Pitted or scratched lenses are dangerous and should be replaced immediately. The types of eye protection available are:

x Glasses, tinted or plain x Prescription Safety Glasses x Full Face Visor x Goggles.

2.16 PROTECTION AGAINST EXCESSIVE NOISE

Where persons are exposed to excessive noise, ear protection MUST be worn. High-risk areas of excessive noise may include: x Generators x Cartridge operated tools x Motorised winches

Ear protection will be provided by means of ear defenders or disposable earplugs.

2.17 RESPIRATORY PROTECTION

Where protection against dust and fibrous substances pose a threat in the immediate working area a FFP3 facemask MUST be worn at all times. This facemask should also be worn when loosening switch gear lids, and removing porcelain fuse carriers where asbestos cloth may be present and in areas where mandatory signs dictate.

2.18 FOOTWEAR

Safety footwear MUST be worn at all times and is made available by the company in the form of safety shoes/boots or wellington boots.

2.19 HIGH VISIBILITY CLOTHING

High visibility garments MUST be worn in areas of specific risk and where mandatory regulations apply, e.g. x Construction sites x Public Highways x Vehicle breakdowns x Emergency working at night

2.20 WORK WEAR

Approved work wear MUST be worn at all times. Flame retardant overalls MUST be worn when working in substations.

2.21 COSHH (Control of Substances Hazardous to Health)

Examples of substances used by field operatives are:

x Bite Back Spray x WD 40 Oil Spray x Engine Oil x Diesel x De-Icer

User information for the above substances can be found in the Health & Safety Management System.

Where containers of unknown substance (e.g. chemicals, solvents, weed killer etc.) are encountered and are deemed to be an unacceptable risk in allowing us to carry out the work, then the work shall not proceed until suitable safety advice has been sought.

Where Warning Signs are attached to buildings advising there is a chemical risk inside (e.g. Ammonia present in potato stores etc.) then Operatives MUST NOT enter until suitable on-site safety advice has been obtained.

NOTE: Some substances can seriously affect your skin, eyes and breathing. DO NOT take unnecessary risks.

2.22 ASBESTOS

Where a meter or associated equipment is fixed to cement based meter board (that may contain Asbestos), the meter or associated equipment must not be disturbed or removed. AIRline must be informed so the job can be referred back to the Distribution Network Operator for remedial action.

2.23 BUILDING AND CONSTRUCTION SITES

Before work can commence on a building site, operatives must report to the Site Manager, Agent or Representative. This is a requirement under the Construction, Design and Management Regulations (CDM Regs).

Site mandatory requirements must be complied with including requests to complete an induction programme. The induction programme should normally be backed up with a card being issued that has a unique number printed on it. Future visits to that site or company should then result in a simple signing in and signing out procedure as well as us being informed of any site-specific hazards that may be present.

Operatives must ensure their Safety Passport has been signed and dated at the time of the induction.

When visiting completed properties appropriate PPE MUST be worn at all times, as per the site regulations.

Site specific PPE may be required to be worn as per site instructions eg light weight gloves. These would normally be issued by the site agent, while working on their site.

Of particular importance to Site Managers is the need for us to effectively communicate back to them any problems relating to safety that could result in properties not being energised.

Whilst it is acceptable to leave a Defect Card inside the property this must also be verbally communicated to the Site Manager or Agent before leaving site.

Operatives may be asked to produce proof of Competency/Authorisation to other responsible persons, e.g.

x Heath and Safety Inspector x Safety Representative x Site Manager

Operatives shall at all times have access to their: x Code of Practice x Competency Certificate x Authorisation to work on the Network x Permit to Operate (where required) x Safety Passport (where required)

Operatives may be requested to provide written Method Statements for the work to be carried out, these can be gained by contacting your Line Manager or a Health and Safety Advisor.

2.24 IDLE SERVICES

Treat all idle services as LIVE. x Idle Service Identified With No Meter Ensure that the service is in a safe condition and there is no risk of direct contact with live parts and if safe to do so, apply warning labels/caution tape. Inform AIRline if the service needs urgently removing or isolating. x Idle Service Where The Meter Is To Be Removed

Remove the meter as per this Code of Practice and apply warning labels/caution tape. If the service needs to be removed urgently, inform AIRline.

x Idle Services in Building or Demolition Sites

Be observant of the environmental conditions, i.e. ground work and demolition activities. If a service is identified, demonstrate caution and visually inspect the condition. Do not touch or move the service, report immediately to AIRline and site representative.

2.25 LABELS, STICKERS AND CARDS

Where it is a contractual, legal obligation or part of this Code of Practice the appropriate warning labels, stickers or cards shall be attached at the meter position or left with the customer.

Only the current versions of these shall be used.

Section 3

Basic Electrical Safety Requirements

(Single and Multi Phase)

3.1 SINGLE PHASE

These requirements must be followed at all times so as to ensure the safety of Staff, Customers and Contractors.

(a) Operatives must have in their possession and use, when appropriate, such safety equipment as is required to complete their assigned tasks.

(b) Operatives must be competent to carry out the designated task. The operative must carry proof of Competence, Authorisation to work on the appropriate network, safety passport and a Permit to Operate where contractual requirements dictate.

(d) Operatives with objections to job instructions prior to visiting a site must first communicate the reasons to their Line Manager and if necessary, to a higher authority. The objections must be satisfactorily dealt with before work continues on the part in dispute.

(e) Operatives must not work in substations unless they have had appropriate training for substation work and are in possession of the necessary authorisation and PPE. In special circumstances Network Owner supervision may be required.

(f) Operatives must comply with customers own safety requirements i.e.

x Reporting to site manager’s office on building sites. x Comply with any induction requirements. x Wearing of Personal Protective Equipment

(g) When arriving on site a risk assessment must be carried out before any work commences. If it is deemed not safe to continue with the work on the grounds of safety the customer and AIRline must be informed.

(i) Before commencement of any work, the customer, where practical, should be advised that the supply is to be interrupted and be invited to power down equipment.

(j) Where possible the main isolator should be switched off and a visual check made on the meter to verify no consumption before the fuse carriers are withdrawn from the incoming cut out.

(k) All meters and associated equipment must be considered live until proved to be dead. Proof will be obtained by correct use of an approved testing device in accordance with the safe working methods (refer to sections 7 and 8 of this Code of Practice).

(l) Before working on the metering equipment complete isolation must be made from the distribution supply network. The only exception to this is the carrying out of approved testing procedures

(m) All customers wiring must be treated as live until proven dead. Extra precautions must be taken under the following situations: x Back feeds on new connections from adjoining properties (extension leads/generators).

x Auto stand by generators without change over switches. x Other means of generating electricity onto the network, e.g. solar panels, wind generators

(n) All cables must be polarity marked using an approved identification techniques as per Appendix 1 of this document and the safe working methods contained in this Code of Practice.

(o) LIVE WORKING IS NOT PERMITTED, refer to section 2.5.

(p) If a gas meter or gas pipes are in the vicinity of the electric meter or associated equipment the operative must be aware of the position and operation of the customers main gas control valve in case of emergency. The Gas Regulations BS:6400 state that the gas meter must not be within 150mm of the electricity meter and customers switch gear. Gas pipe work must not be within 25mm of the distribution service cable or cut out, any concerns must be reported through Airline for follow up.

(q) When working on cut outs all exposed live terminals must be shrouded sufficiently to prevent direct contact. Shrouding material must be used to prevent indirect contact with metallic parts of cut outs and exposed pipe work.

(r) Metering equipment under test or adjustment with exposed live parts must be under the immediate control of the operative. Under no circumstances must the meter

position be left unattended where there is a risk of direct or indirect contact with live parts.

(s) During some electrical work an operative will need to be accompanied by another employee. The Operative’s Line Manager will advise on the level of accompaniment.

(t) Any accident or dangerous occurrence must be reported to AIRline as soon as possible after the incident i.e.

x Electric shock x Flash over x Crossed polarity x Near misses

Whether causing injury or not, must be reported to AIRline as soon as possible after the event. All accidents must be recorded.

(u) On completion of the work the site must be left tidy and the waste material removed for correct disposal.

(v) When working on multi metering installations, back feeds and crossed neutrals must be considered. Where a back feed or crossed neutral is identified advice from a Line Manager must be sought before any further work commences.

3.2 MULTI PHASE

These requirements must be followed at all times so as to ensure the safety of Staff, Customers and Contractors.

(a) Operatives must have in their possession and use, when appropriate, such safety equipment as is required to complete their assigned tasks.

(d) Operatives with objections to job instructions prior to visiting a site must first communicate the reasons to a Line Manager and if necessary, to a higher authority. The objections must be satisfactorily dealt with before work continues on the part in dispute.

(f) Operatives must comply with customers own safety requirements i.e.

x Reporting to site manager’s office on building sites. x Comply with any induction requirements. x Wearing of Personal Protective Equipment

(g) When arriving on site a full risk assessment must be carried out before any work commences. If it is deemed not safe to continue with the work on the grounds of safety the customer and Airline must be informed.

(h) The polarity of the installation must be determined before and after all meter and equipment changes as per this Code of Practice. Every opportunity will be taken to validate the polarity of the customer’s installation on all other visits. If at any point the polarity is found to be incorrect a Line Manager must be contacted immediately. Before commencement of any work, the customer where practical, should be advised that the supply is to be interrupted and be invited to power down equipment and machinery.

(i) All cables must be polarity marked using an approved identification technique as per Appendix 1 of this document and the safe working methods contained in this Code of Practice.

(j) A phase rotation test must be carried out before any connections are disturbed at the meter position. Whether standard or non-standard the customers phase rotation must remain the same on completion of the job. Where practicable get confirmation of correct operation of three phase machinery from a site representative before and after completion of the job.

(k) Multi phase meters MUST NOT be changed without turning off the customer’s main isolator.

(l) The main isolator must be switched off and a visual check made on the meter to verify that no energy is being recorded before the fuse carriers are withdrawn from the incoming cut out. For any work on associated equipment satisfactory isolation must be afforded by the removal of the incoming cut out fuses. The only exception to this is the carrying out of approved testing procedures.

(m) All meters and associated equipment must be considered live until proved to be dead. Proof will be obtained by correct use of an approved testing device in accordance with the safe working methods (refer to sections 7 and 8 of this code of practice).

(n) Before working on the metering equipment complete isolation must be made from the distribution supply network. The only exception to this is the carrying out of approved testing procedures.

(o) All customers wiring must be treated as live until proven dead. Extra precautions must be taken under the following situations:

x Back feeds on new connections from adjoining properties (extension leads/generators). x Auto stand by generators without change over switches. x Other means of generating electricity onto the network, e.g. solar panels, wind generators.

(p) LIVE WORKING IS NOT PERMITTED, refer to section 2.5.

(q) If a gas meter or gas pipes are in the vicinity of the electric meter or associated equipment the operative must be aware of the position and operation of the customers gas control valve in case of emergency. The Gas Regulations BS:6400

state that the gas meter must not be within 150mm of the electricity meter and customers switch gear. Gas pipe work must not be within 25mm of the distribution service cable or cut out, any concerns must be reported through Airline for follow up.

(r) Metering equipment under test or adjustment with exposed live parts must be under the immediate control of the operative. Under no circumstances must the meter position be left where there is a risk of direct or indirect contact with electricity.

(s) All multi phase meter installations must be connected with a Standard phase rotation. The rotation will be determined by using an approved Phase Sequence Indicator (PSI). The leading phase must be identified as ‘L1’ and subsequent phases ‘L2’ – ‘L3’.

(t) When working on cut outs all exposed live terminals must be shrouded sufficiently to prevent direct contact. Shrouding material must be used to prevent indirect contact with metallic parts of cut outs and exposed pipe work.

(u) During some electrical work an Operative will need to be accompanied by another employee. The Operative’s Line Manager will advise on the level of accompaniment.

(v) Any accident or dangerous occurrence must be reported to AIRline as soon as possible after the incident i.e.

x Electric shock x Flash over x Crossed polarity x Near misses

Whether causing injury or not, these must be reported to AIRline and the Line Manager as soon as possible after the event. All accidents must be recorded.

(w) On completion of the work the site must be left tidy and the waste material removed for correct disposal.

When working on Multi metering installations, back feeds and crossed neutrals must be considered. Where a back feed or crossed neutral is identified advice must be sought from a Line Manager before any further work commences.

Special care must be taken where three single phase meters are being used to supply multi phase equipment. This must be determined at the start of the job by observing the type of installation, i.e., commercial or industrial and observing if multi phase equipment is connected.

3.3 SEALING OF METERING EQUIPMENT

All metering and ancillary equipment points must be sealed using approved sealing pliers, sealing ferrules and high tensile sealing wire. The indentation created by the sealing pliers must be clear and readable.

It is the Operative’s responsibility to periodically check for adequate sealing die impression and to ensure that the whole of the sealing die is applied to the ferrule seal to leave a full sealing ID.

Items that require sealing include: (all points must be sealed) x Meter terminal covers x Timing control devices x Terminal covers and inspection covers x Cut outs (both lugs to be sealed where possible and safe to do so) x Neutral covers x 4 amp fuse carriers x Single and double pole blocks x Contactors x Isolators x Test blocks x Meter panels

When sealing the metering equipment all seals shall be trimmed so that no high tensile wire extends from the sealing ferrule. Care should be taken when trimming sealing wire to ensure that surplus wire does not become ‘airborne’ and in doing so become a hazard.

All waste materials from the sealing operation shall be removed and disposed of in accordance with environmental procedures.

Sealing pliers must be maintained in a serviceable condition by the Operative.

Section 4

Testing

4.1 VISUAL INSPECTION AND RESPONSIBILITIES

Electrical Contractor:

It is the legal responsibility of the electrical contractor who is carrying out the work on the installation to ensure that it conforms to BS 7671.

Siemens Operational Services:

Are legally responsible to carry out a visual inspection of the installation in compliance with the ESQC Regs and any defects must be highlighted to the customer on the appropriate defect card. Where it is deemed that the installation is unsafe the supply could be withheld or disconnected. If in any doubt contact a Technical Manager for advice.

4.2 POLARITY TESTING

Before commencing work at a meter position, polarity will be confirmed at a socket outlet (eg ring main and cooker circuit). On completion of the job, polarity will be confirmed at the same socket as tested at the beginning of the job.

Polarity testing MUST be carried out using the company approved: x Neon Testoscope x Plug in test device x Volt Stick

The following equipment MUST be tested for correct polarity on the installation, maintenance and operation of:

x Cut outs x Meters x Timeswitches or teleswitches x Contactors x Isolators (top and bottom) x Connector Blocks x Test Terminal Blocks

Suitable polarity testing points on the customer’s installation are: x Socket outlets within the premises x Consumer unit(s) x Isolators x Main Switches and Panels

WARNING:

To ensure that work on the metering equipment has not altered the polarity of the customer’s installation; the polarity must be proved at the same points both before and after the work being carried out. If polarity testing is carried out at a cooker socket before work commenced, then it shall be carried out again at the cooker socket when work is completed, and not at any other sockets.

If at any time the polarity is found to be incorrect on the installation do not attempt to rectify any wiring, contact a Technical Manager immediately. DO NOT PROCEED WITH THE WORK

4.3 PROVING DEAD

Proving dead shall be undertaken using the approved test lamp. The operation of the test lamp must be proved before and after every test by the use of a proving device or confirmation on a known live supply. It is advisable that the operative always carries a spare test lamp bulb in case of failure.

4.4 WORKING AT OUTSIDE METER POSITIONS

When working at an outside meter position and access to the property is gained, the installation polarity MUST be verified in accordance with this Code of Practice.

Where access to the property cannot be gained the meter exchange should be aborted. The operative will contact scheduling and arrange a further appointment no shorter than 2 weeks in the future. This date will be entered onto a card which will be posted through the door at the property. On the return visit if access is gained the meter exchange will take place and the installation polarity MUST be verified in accordance with this Code of Practice. If the customer is still not present on the follow up visit then the load on the meter MUST be measured using test equipment to establish the load does not exceed 5 Amperes. If this is the case and no additional circuitry is in place or changes to wiring need to take place then the meter can be exchanged following this Code of Practice

Under no circumstances must a single phase meter be changed in an outside meter position when cold calling and no access to the installation is available.

The meter and customers cables must be identified with approved markers before any work commences. The polarity at the cut out and meter (incoming and outgoing) must be confirmed that they correspond with the cable markings before the cables are removed from the meter. This ensures that the cables can be reconnected so as not to alter the Polarity State of the installation. A note must be made on the MDT, ECO and witness sticker that the customer was not present at the time of the meter change.

If the tails cannot be marked while still connected to the meter, they MUST be marked individually as they are removed from the terminal.

Consideration MUST be given to the colour of the inner cores of the cable and that they correspond to the markings and the live and neutral terminals of the meter see example below.

If any of these scenarios are identified, a revisit to the premises MUST be arranged to confirm polarity of the installation. Inform your Line Manager and AIRline

Under no circumstances must a multi phase meter be changed in an outside meter position without access to the customer’s main isolation switches.

In situations where meters are mounted on a swing door and are to be changed to a pre- payment meter, accessed from inside the property, a meter board must be fitted at a suitable permanent position. This is to reduce mechanical stress and damage to the insulation of the meter tails when the customer credits the meter.

4.5 INSULATION RESISTANCE TESTING

For normal metering work there is no contractual requirement for OS to test the customer’s wiring. The meter tails are energised up to the main switch or isolator only (switch turned off) and the customer or their electrician is responsible for ensuring that adequate tests have been carried out on the installation in accordance with BS 7671.

Insulation resistance testing shall be undertaken on all properties that have been identified as having a Reverse Polarity as defined under Section 31 of The Electricity Safety, Quality and Continuity Regulations 2002.

Nominated staff within meter operations shall be authorised to carry out insulation resistance testing in accordance with the reverse polarity procedure and test results recorded.

In accordance with 4.15 of this Code of Practice, a glow test must be conducted with a test lamp across the cut out before inserting the fuse carrier. This is to determine if there is a risk of inserting a fuse while a short circuit is in place (e.g. tails trapped inside metal trunking or faulty meter). A full light indicates that there may be a fault and appropriate steps must be taken to determine the cause and the appropriate action taken.

4.6 VISUAL EARTHING CHECK (Where contractual arrangements dictate)

The Operative, so far as is reasonably practicable, must ensure that the PME Equipotential Bonding meets the necessary requirements of The IEE Wiring Regulations BS 7671. A copy of the Earthing Guidance Notes will be issued to operatives engaged on this type of work.

4.7 PHASE TO EARTH LOOP INPEDANCE TEST (Where contractual arrangements dictate)

The phase to earth loop impedance MUST always be tested at the service cut out, and not a socket outlet inside the property. The test at the service cut out should be carried out with all outgoing cables removed.

Where maximum values are exceeded as per contractual requirements, AIRline must be informed. The work must only be carried out on instruction from the Network Owner.

It is not permissible to connect any installation where there is no effective means of earthing. If in doubt seek advice from a Line Manager.

4.8 PHASE SEQUENCE CHECK

Phase sequence must be determined by using an approved PSI.

The meter must be connected with a standard phase sequence with the leading phase being labelled “L1” for all installations.

The phase sequence on the customer’s existing installation must remain unchanged on completion of the work.

IF IN DOUBT SEEK ADVICE FROM A TECHNICAL MANAGER

4.9 FAULT DIAGNOSIS (timing devices and contactors)

Before any seals are removed or physical work commences the operative should find out as much information as possible from the customer. Check that the switching times are as the SSC code and the time of day is correct. In all cases involving a timing device where the time can be physically altered, the time should be set to represent off peak hours and confirm correct operation of the meter or contactor.

Where it is necessary to test the switching operation of auxiliary equipment the operative must use an approved test lamp to bridge out the auxiliary terminals.

Under no circumstances must terminals be bridged using a piece of wire or other conductive material.

All outcomes should be entered into remarks section on the MDT or ECO.

4.10 DE-ENERGISATION OF SERVICE

Where meters are to be disconnected and removed, attach the current “DANGER – TREAT AS LIVE” safety label/tape to the cut out.

Where it is evident that a live service needs to be urgently removed, inform AIRline.

In the event that the supply to a property is via a solid link cut out, (e.g. rising mains in a block of flats) and access to the Supply Fuse is restricted, then all tests and isolation shall be carried out at the solid link cut out. Cables shall be physically removed from the solid link cut out, and open terminals shall be blanked off to restrict direct contact.

NOTE: The solid link barrel shall not be removed from the red head carrier, replace carrier, fit high security seals and apply “DANGER – TREAT AS LIVE” label/tape.

Before any meters or associated equipment are removed from the idle service, care must be taken that no back feed exists, and tests must be carried out using an approved voltage tester.

4.11 DISCONNECTIONS AND REMOVAL OF ALL OR PART OF METERING EQUIPMENT

Where Neutral tails are wired in a “not to current standard” manner (as per example photo page 43) and cannot be visually traced, then electrical checks using an approved test lamp shall be carried out on the consumer unit main switch to ensure the correct neutral tail has been left connected. The test lamp shall be proved before and after use.

The test lamp check shall be carried out on the incoming side of the main switch with the main switch in the OFF position. This will involve carefully removing the cover off the consumer unit.

Where neutral tails can be visually traced for 100% of their length there is no need to carry out the test lamp check.

It is the operative’s responsibility to ensure the correct neutral tail has been removed and that the customer’s installation is left in a safe state.

The operative must contact a TMO, or other technical person, where there are any concerns or doubts relating to disconnecting the correct neutral tail.

Neutrals must NOT be connected as per the photo over page. Outgoing neutrals must both be connected into a connector block with just one neutral connected to the meter.

Not acceptable

4.12 TEMPORARY SUPPLIES (AREAS OF SPECIAL RISK)

As a Meter Operator we are not responsible for the design of the installation. However in areas of special risk e.g. temporary supplies, caravans, boats, swimming pools, and building sites we have an obligation to ensure that connection to the Distribution Network does not represent a danger to the customer or the public. In such instances earth electrodes and Residual Current Devices (normally 30mA) would be expected. Reference must be made to the Earthing Guidance Notes. If there is any doubt please seek advice from a Line Manager or Safety Advisor.

4.13 SUSPECTED INTERFERENCE AT THE METER POSITION

Great care must be taken by the Operative when attending a job where tampering is suspected. An initial visual risk assessment must be carried out. If interference is suspected or found, contact AIRline immediately. They will inform the relevant Revenue Protection appointed agent.

Under no circumstances must the meter be physically touched without the removal of the incoming cut out fuse.

4.14 APPROVED TESTING DEVICES FOR VOLTAGE AND POLARITY

MARTINDALE Proving Polarity on customer’s sockets

VOLT STICK Voltage and Polarity Indication

TEST LAMP NEON TESTOSCOPE

For Proving Dead Hard Connection for Proving Polarity

4.15 GLOW TEST FOR SINGLE AND MULTI PHASE INSTALLATIONS

The glow test must be carried out on all meters prior to energisation, for both new and existing installations the reason for the tests is to highlight faults that may exist on meters, associated equipment and customer’s tails.

The test procedure is as follows:

x Check operation of the test lamp by the use of a proving device or known live supply.

x Insert one probe of the test lamp in the dead side of the cut out.

x Insert the other probe of the test lamp into the live side of the cut out.

x Observe the test lamp results, see following diagrams.

EXISTING INSTALLATION – ACCESS GAINED SINGLE AND MULTI PHASE

x Ensure that ALL Main Switches are in the OFF position, where reasonably practicable.

EXISTING INSTALLATION – NO ACCESS SINGLE PHASE ONLY OR REMOTE METER POSITIONS:

x When working at an outside meter position or remote meter position and access to the customer’s main switch cannot be gained, the customer’s tails must be removed from the meter before the test is carried out.

NEW INSTALLATION – TEST AND CONNECT SINGLE AND MULTI PHASE:

x Ensure that the new meter tails are connected into the meter and the customer’s main switch is in the off position.

NEW INSTALLATION – INSTALLING AN ISOLATOR SINGLE PHASE ONLY:

x Ensure that the new meter tails are connected into the isolator and the isolator is in the on position before the test is carried out.

Normal Operation (Meter Glow)

x This picture indicates the Test Lamp showing Meter Glow. This indicates normal operation and no fault exists.

Note: Electronic meters with LCD displays On certain electronic meters the test lamp WILL NOT indicate meter glow BUT the meter LED display will show. This will indicate normal operation and no fault.

Full Light (Fault Indicated)

x Full light (as shown) indicates that there is a possible fault on the installation between the

cut out and the customer’s main switch. x DO NOT insert the Main Cut out fuse. x Check that the Main Switch is in the OFF position. x Carry out a full visual inspection of tails, Isolator and/or Main Switch. x Disconnect customers outgoing tails and retest x Identify the fault if possible

x Isolate fault if possible. x Contact your Line Manager for further guidance.

The glow test must be carried on ALL phases of a multi phase meter

Meter Display illuminated. x

Note NO Glow visible on Test x Lamp.

x The example shown is a multi phase meter but the results are the same on some single phase credit and prepayment meters.

4.16 ONE FUSE TEST FOR MULTI PHASE NEW AND EXISTING INSTALLATIONS It is important that you establish you are not inserting a cut out fuse onto a phase to phase fault that could be present for e.g. at the meter, isolator or customer’s main switch. This procedure is as follows: The One Fuse Test (conducted after glow test)

x Carry out Polarity tests at the cut out. x Establish the Phase rotation at the cut out and visually check phase markers correspond to phases. x Ensure that ALL customers’ main switches are turned off.

Insert fuse in cut out “L1” only. x x Check with your Voltstick that both terminals labelled “L1” indicate a voltage. x Check all other live and neutral load terminals, there should be NO LIGHT on the Voltstick.

x If at anytime during the test procedure the Voltstick shows voltage on any other terminal then abort the test immediately.

x Rectify Fault (if possible) or seek technical assistance.

x Check “L1” terminal on Isolator / Main Switch, (Polarity Test).

x Remove Fuse from Cut out “L1” and Insert in cut out “L2”.

x Carry out procedure as for “L1”.

x Remove Fuse from Cut out “L2” and Insert in cut out “L3”.

x Carry out procedure as for “L2”.

4.17 PHASE ROTATION TEST

Photo shows mechanical drum type PSI. When correct phase rotation is identified the arrow will spin anti-clockwise.

Photo shows electronic type PSI. When correct phase rotation is identified the correct LED’s will light up.

Photo shows phase rotation being identified at a large power cut out. The PSI has been fitted with “crocodile clips” on two leads to assist with the connections.

4.18 TESTING PHASE TO NEUTRAL AND PHASE TO PHASE ACROSS MULTI PHASE METER TERMINALS WITH APPROVED TEST LAMP

4 1

L1 Phase to Neutral = 230 volts L1 Phase to L2 Phase = 400 volts

Normal brightness on test lamp Bright light on test lamp

2 5

L2 Phase to Neutral = 230 volts L1 Phase to L3 Phase = 400 volts

Normal brightness on test lamp Bright light on test lamp

3 6

L3 Phase to Neutral = 230 volts L2 Phase to L3 Phase = 400 volts Normal brightness on test lamp Bright light on test lamp

4.19 TESTING SEQUENCE AT A CUT OUT USING AN APPROVED TEST LAMP ON BOTH TNC-S AND TN-S EARTHING SYSTEMS

Neutral - Earth

Neutral to Live =

Live

TN-C-S

(PME)

Neutral to Live = Neutral Earth

Earth to Live =

Live

Earth to Neutral =

Neutral to Live = TN-S (SNE)

4.20 TESTING ISOLATORS

When an isolator has been fitted at a meter position, polarity must be confirmed at both incoming and outgoing sides of the isolator using an approved testing device.

Supply must be confirmed at both incoming and outgoing sides of the isolator. This must be competed using an approved test lamp with the Isolator in the “ON” position. On completion of the job the Isolator must be left in the “OFF” position and the appropriate disclaimer label attached.

Confirming polarity at an isolator with an approved testing device

Confirming supply at an isolator with an approved test lamp

Section 5

Layouts and Making Connections to Metering Equipment

5.1 TERMINATING CABLES

All conductor terminations shall be mechanically and electrically sound. Every connection at a cable termination shall securely contain and anchor all the wires of stranded conductors, and not impose an appreciable mechanical strain on the terminal. At every cable termination, the insulation shall be removed no further than is necessary so that illegal connections are prevented.

The trimming of cable cores to reduce the cross sectional area of the cable is strictly prohibited on all tails. Specific meters with large terminals shall be installed or an approved method of cable size reduction adopted.

In the case of single core PVC insulated and sheathed cables, the PVC insulation should first be cut back to expose a slightly longer length of conductor that is required to fully enter the terminal. The PVC sheath should be cut back to expose between 3mm and 5 mm of the PVC insulation to give a stepped effect.

Stepped 3mm to 5mm

All cable sizes 16mm and below must be twisted using pliers to ensure maximum mechanical and electrical connection, except on square/clamp terminal connections. (see 5.2) Trim conductor to length to ensure that the PVC insulation of the cable butts up to but does not enter the meter terminal block. The PVC sheath should just enter the tapered orifice in the moulded insulation. Ensure that the conductor is fully inserted into the terminal. Tighten the terminal screws nearest to the cable entry. Then tighten the terminal screw furthest to the cable entry, ensuring that it grips the cable conductor. Then give a final tightening to both terminal screws.

Only one conductor shall be connected to each terminal of meters, cut outs, time switches, isolators and associated equipment. Where more than one conductor is to be connected, a connector block shall be fitted.

After all connections have been made a final check on the tightness of all terminal screws MUST be carried out manually, not with a battery operated tool.

NB: When stripping the inner insulation from the cable, care must be taken not to damage the copper cores, where damage has occurred then the cable must be re- terminated or replaced.

5.2 SQUARE CLAMP CONNECTIONS

Certain meter types and metering equipment have a square, clamp type terminal for connecting meter tails.

Care must be taken to ensure the cable sits inside the square clamp and not behind, as this would cause the cable to overheat and potentially cause a fire. Mechanical security of the termination must be confirmed with a physical tug on the cable.

To ensure a good mechanical connection tails can be flattened to fit into the square clamp to ensure a tight fit within the terminal. The cable should be pulled and re tightened at least twice to verify the connection.

Care must be taken not to clamp the cable insulation with the bottom screw.

Clamp type connections on a heating contactor. Connection must be fully open to ensure cable sits inside and not behind the clamp.

5.3 CABLES

The cables between the cut out and all metering equipment shall, where practicable, be PVC, double insulated stranded copper conductors. The cable size for connection between the cut out and the meter shall be 25mm where the cut out is fused at 100 amps. Where 16mm tails are installed fuses should be installed with a rating of 60/80 amps. Cut out to meter cables must be upgraded where reasonably practicable if they are not suitable for use e.g. Refer to 5.14 x Undersized x Non PVC x Stressed, damaged or not fit for purpose

At existing meter positions or installations where single insulated cables are feeding the meter and run through trunking or conduit, the existing cables can be adopted if the cables are deemed to be in a good sound mechanical and electrical condition. In this scenario the meter MUST be fitted, as close as possible to the trunking to maintain mechanical protection. Where this cannot be achieved sleeving must be added to the single insulated cables to maintain double insulated standards. Contact a Technical Manager if in any doubt.

Auxiliary wiring used in the connection of time controllers and contactors will normally consist of 10mm up to the 4amp fuse where applicable, and 2.5mm between the 4amp fuse and control apparatus where applicable.

Polarity of cables must be clearly identified with approved markers irrespective of the outer sheath colour e.g. x For single phase Live = L x For multi phase = L1, L2 and L3 x For all Neutrals = N

The bunching of cables at the cut out or at the meter terminals is NOT permitted. Approved connector blocks must be used to segregate previously bunched cables. In the event of the customer’s meter tails being defective (i.e. single insulated, inadequate size or insulation) an isolator will be fitted using 25mm tails from the meter to the isolator and the customers’ tails connected to the outgoing side. The appropriate defect form/card should be left with the customer. If the customer’s tails are considered unsafe, advice should be sought from a Technical Manager before the work commences.

5.4 NEUTRALS DIRECT INTO METER

Where the Distribution neutral has been connected directly into a meter and the meter is to be changed, after completing a Risk Assessment as per this Code of Practice the neutral will be reconnected as found. On completion of the job, AIRline must be informed. AIRline will contact the DNO to complete remedial work.

L N N L

Where PME has been requested, a neutral block will be fitted and PME connected as per Earthing Guidance Notes.

PME

L N N L

5.5 HARMONISATION OF CABLE COLOURS

Great care must be taken where new and old colours exist on the same installation. In these cases a yellow Caution sticker must be stuck in a prominent position at the meter position.

Old Colours New Harmonised Colours

Red L1 Brown

Yellow L2 Black

Blue Grey L3

Neutral N Blue

L1 Load

L2 Load

L3 Load

Multi Phase Load

5.6 STANDARD LAYOUTS FOR WHOLE CURRENT METERING

General

This Code of Practice recommends standard layouts to cover all normal arrangements for whole current metering installations, to include domestic, commercial and light industrial tariffs.

5.7 LAYOUT OF METER BOARDS

Standard layouts shown for the position of the cut out, meters, time controller, connector blocks and contactors shall be followed as closely as practicable, examples of these can be found in the respective wiring diagrams.

Wherever possible the equipment on the meter board shall be positioned so that a clear space of 25mm is left around the edge of the board.

5.8 METER BOARDS

All metering and associated equipment shall be installed on an approved meter board as recommended by the DNO.

Where reasonably practicable an access space of at least 1200mm should be available in front of the meter board. The bottom edge of a meter board should not be less than 400mm above the finished floor level.

Where an existing meter board is not large enough to take additional metering equipment, then another meter board shall be fitted alongside.

Where a meter is installed on a non standard meter board or cabinet, i.e. metal plate or on brickwork, every effort should be made to install a standard meter board. Where this cannot be achieved fit meter as existing.

Meter board fixing screws must be secure. Where this is not the case operatives must endeavour to retighten/replace the screw into the original fixing hole. If this is not possible AIRline must be informed. It is NOT permitted to change any meter board containing a live service cut out.

Where a pre-payment meter is to be fitted to an existing installation and the service position is of unreasonable height or the customer is physically disadvantaged to safely

access the meter, a second meter board will be installed in a lower position and the pre- payment meter fitted to it. If this is not possible on the original visit, the job must be aborted and rebooked allowing extra time for the additional work to be completed.

All wiring required to lower the meter will be left neat and tidy and where necessary mechanically protected in plastic trunking.

5.9 OUTDOOR METER CUPBOARDS

Wherever practical the standard layout shall be used for outdoor meter cupboards.

5.10 DAMAGED METER BOXES

The Operative will endeavour to repair the damaged meter box or door at the time of the visit to protect the metering equipment. Where this is not possible a temporary repair should be made and the appropriate “Damaged Meter Box” warning label attached.

All damaged meter boxes and doors must be reported to AIRline.

5.11 STANDARD LAYOUT FOR SINGLE PHASE METER POSITION

L N N L

• All cables shall be single core, PVC, double insulated. • 25mm tails to be fitted when 100 amp service fuse has been installed. • Minimum 25mm gap to be left around edge 100A SERIES 7 of meter board.

IN UK IN • Both incoming and outgoing live and neutral tails must be clearly identified with MADE

SERIES 7 the appropriate cable markers. • Earth wires omitted for clarity.

E L

E H

5.12 STANDARD LAYOUT FOR MULTI PHASE METER POSITION

• All cables shall be single core, PVC, double insulated. • 25mm tails to be fitted when 100 amp service fuse has been installed. • All phase cables shall be marked L1,L2,L3 and N respectively. • Phase rotation shall be left standard across the meter terminals.

• Minimum 25mm gap to be left around edge of meter board. • Earth wires omitted for clarity.

L1 L2 L3 N

100A SERIES 7 100A 100A 100A

100A SERIES 7 MADE IN UK IN MADE UK IN MADE MADE IN UK MADE

SERIES 7

SERIES 7 S SERIES 7

E R

Y I

N 7

HENLEY HENLEY H

5.13 LOAD RESEARCH AND ENERGY EFFICIENCY EQUIPMENT

Where load research/energy efficiency equipment is being installed and connected, under no circumstances must a flex (normally supplied with this type of equipment) be connected directly into the cut out, meter or test blocks. Connection must be through a suitably rated fuse that provides adequate short circuit and over current protection.

5.14 FUSE RATING

All cut out fuses shall not exceed the current carrying capacity of the meter that is to be changed/installed, however there will be circumstances where the loading of the meter, sizing of the tails and current carrying capacity of the fuse DOES NOT match due to diversity of the customers installation. In cases where fuse sizes cannot be altered due to non standard fuse types not being available, then the customer, AIRline and the relative Network Owner shall be informed. If any doubt arises seek clarification from a Technical Manager. Refer to Fuse Sizing table below.

FUSE SIZING TABLE Cut Out Fuse Size Cut Out Customer Comments with ref to tails and meter to Meter Tails Tails 60 AMP 60 AMP 16mm 16mm or OK below 60 AMP 60 AMP 16mm 25mm Upgrade tails where practicable

60 AMP 60 AMP 25mm 16mm or OK below 100AMP 60AMP 16mm 25mm Upgrade cut out to meter tails to 25mm where reasonably practicable 100 AMP 100AMP 25mm 16mm Install isolator using 25mm from meter and connect customers’ 16mm tails into isolator. Leave safety notice with customer 100 AMP 100 AMP 25mm 25mm OK 100 AMP 100 AMP 16mm 25mm Upgrade cut out to meter tails to 25mm ABOVE 160AMP 25mm or 25mm or Determine why 160A fuses have been installed? If this 100 AMP and 35mm 35mm cannot be determined contact technical support for above advice before changing the meter. ABOVE 160AMP 50mm 50mm Determine why 160A or above fuses have been 100 AMP and and and installed? If this cannot be determined contact technical above above above support for advice before changing the meter.

Cut out Fuse Rating 60 A 80 A 100 A

Max ELZ Value (Ohms) (UKPN DNO)) 0.35 0.35 0.35 NO Fuse should be downgraded

All cables should be double insulated. Where the customers cables are single insulated, sleeving must be added to maintain double insulated standards. Contact a Line Manager if in any doubt.

5.15 RISING MAIN INSTALLATIONS AND PRE-PAYMENT METERS (DEBT COLLECTION DEVICES)

The standard layout of meter boards shall be used in situations where pre-payment meters are being used as debt collection devices. The carrier in the cut out adjacent to the meter shall be fitted with a solid link in place of the fuse. For identification purposes carriers fitted with solid links shall be coloured red. Where a solid link is found, under no circumstances should a HRC fuse be used to replace the link. Where HRC fuses are found under no circumstances must a solid link be fitted. On de-energisation of this type of installation then all out going tails must be removed from the red link cut out, terminals must be blanked off and the installation sealed. The idle service must now be labelled with the appropriate “Live Installation” warning label or tape.

Care must be taken when working on an installation where the cut out is remote from the meter position, this situation can be common with rising mains. Refer to Safe Working Method, 7.9.

5.16 CHECKING METER TOLERANCE /ACCURACY

The legal tolerance of a meter must be between 2.5% fast and 3.5% slow. If the test results fall within these tolerances then a meter is deemed accurate.

All equipment used for determining tolerance will be calibrated/dated and have a visible recalibration date attached.

Meter tolerance / accuracy will be completed by one of the following methods:

x Using a stop watch, clamp meter and calibrated fixed load (electric fan heater)

x Fitting a check meter

x Using a meter accuracy load testing device The preferred method for testing meter tolerance is using a stop watch, clamp meter and calibrated fixed load (electric fan heater). Where this method is used the test results will

be input into a “load calculator” on the MDT which will determine if the meter is in or out of tolerance.

The test will be completed three times and an average of the three test results will be taken.

The test results must be recorded as per contractual requirements eg

x Results on MDT x Verbal communication x Test result form

5.17 CONNECTION OF CHECK METERS

The method of connecting check meters is shown in the following diagrams. The diagrams are for reference only and cover the principle of connection for single and multi phase meter tariffs.

Where there is limited space for the installation of the check meter, a small meter board should be installed, and all meters must be securely fixed.

The phase rotation of any multi phase check meter shall be standard rotation, regardless to the billing meter that may be incorrect phase rotation. Refer to 5.18 single phase 5.19 multi phase

5.18 CONNECTION OF SINGLE PHASE CHECK METERS

Check Meter Disputed Meter

L N N L L N N L

100A

SERIES 7

IN UK IN

MADE All new meter tails to be 25mm double

SERIES 7 insulated.

HENLEY Where reasonably practicable the seal on the disputed meter should be left intact.

Meter tails to be removed from the cut

out and terminated into the load side of the new check meter.

5.19 CONNECTION OF MULTI PHASE CHECK METERS

Check Meter Disputed Meter

CE 1 2 3 4 5 6

100 10 1 kWh

ABB

TYPE E43B3B- 30 rev / kWh 3PH 4W A 3 x 40 - CI . 2 V 3 x 230 /

K05FAO265

EAST MIDLANDS

L1 L2 L3 N

L1 L2 L3 N N L1 L2 L3

L1 L2 L3 N

100A 100A 100A

M A D E IN SERIES7 SERIES7 SERIES7

All new meter tails to be 25mm SERIES

H HENLEY HENLEY HENLEY E Where reasonably practicable the N seal on the disputed meter should L be left intact.

Meter tails to be removed from the

cut out and terminated into the

load side of the new check meter.

5.20 SINGLE PHASE WHOLE CURRENT SUB METERING

Customer’s consumer unit

N OFF L

Sub Meter

Enclosure with red links and neutral block mounted on approved meter board

Incoming Sub Main removed from Switch Fuse and glanded into insulated enclosure Earth wire to ensure Earth Continuity

5.21 MULTI PHASE WHOLE CURRENT SUB METERING

Customers Switch Fuse

Sub Meter

Earth wire to ensure Earth Continuity

Incoming Sub Main removed from Switch Fuse and glanded into Enclosure Enclosure with red links and neutral block mounted on approved meter board

All Sub Metering work will be carried out to this Code of Practice (section 7.14) (section 7.15). A full risk assessment will be carried out in accordance with the safe working methods (7.1 to 7.3) in this Code of Practice and the Operative must have a full understanding of the task before any work can take place. If at any time the Operative is unsure technical advice must be sought.

A Sub Metering Electrical Isolation Pro-forma must be completed in conjunction with a responsible representative on site (Site contact) and any permits to work must be obtained, (where applicable).

5.22 Multi Way Distribution Boards (feeding sub mains and meters in remote locations)

When working on multi way distribution boards, the items listed below MUST be considered (e.g. Ryfield/Reyrole/MEM).

x Metal clad construction x Missing phase and fuse barriers giving risk of direct contact with live terminals x Identification of final sub circuits (flat numbers missing or incorrect) x Using fuse finders x Access to fuse terminals to carry out glow test and ELZ verification x Cable types x Cable terminations x Lock off procedure x Sealing of the installation x Reporting of hazards and associated risks

For details, refer to table over page.

Rising Mains with No Means of Local Isolation (Non Standard Cables) Table

Cable Types Action – Incoming Tails Action – Customer Tails Ensure that all cables are de- If tails are electrically and PYRO (MICC) energised as per this Code of mechanically sound, mark the tails VIR Practice. and connect into the meter. SWA Single Insulated No oversleeving to take place whilst If tails in poor condition and prove to PVC the cables are energised. be an electrical hazard, re-terminate cable to a point of safe condition,

oversleeve if necessary and Identify the tails before removing terminate into an isolator. from meter. Oversleeve with brown

and blue sleeving and apply appropriate markers as per this Leave defect card and record isolator COP. fitted on MDT.

Check that main fuse at remote supply position is correct rating (e.g 60 amps) and matched to the cables connected into the meter. Where single insulated tails are Where single insulated tails are Cables in Trunking exposed, mark the tails and apply exposed, mark the tails and apply oversleeving to exposed length. oversleeving to exposed length.

5.23 INTAKE ROOMS

Meter operatives must undertake a thorough risk assessment before deciding if a pre- payment meter can be safely installed inside an intake room.

Typical hazards or issues that may be present include the following:

x Intake room door damaged x Intake room door cannot be locked x Covers missing off switchgear x Terminal covers missing off meters x Covers missing off connector blocks x Exposed Live terminals or conductors x Perished VIR tails x Trunking lid hanging off x Signs of vandalism x Signs of drug misuse (needles on floor) x Risk of rain getting in

x Any other serious cause for concern Notices displayed inside intake rooms saying that pre-payment meters cannot be installed may not be official and may need to be clarified by a Safety Adviser.

OS policy is to continue to install pre-payment meters inside intake rooms provided, as a result of the risk assessment, it is deemed safe to do so. The Health and Safety Executive have been consulted over this issue. Where you are unsure, always seek advice.

Housing Associations and Landlords have a legal duty to ensure intake rooms are safe and secure.

Should the risk assessment determine it is unsafe to install the pre-payment meter; the job must be aborted and reported to AIRline.

Where jobs are risk failed please endeavour to capture the contact details for the site.

5.24 IMPORT / EXPORT METERING PRINCIPLES

Import/export metering is installed on a site that has the capability of producing surplus energy above its own requirements. This surplus energy can be measured by use of an import/export meter or separate export meter.

Before any work is carried out on import/export metering, isolation from the customer’s installation must be confirmed, to ensure there is no back feed generated from the customer’s equipment.

If the installation cannot be isolated or the customer is not present, the job must be aborted.

All work carried out on import/export metering must be completed in line with this Code of Practice, (safe working methods 7.1/7.3)

The following drawings show two separate meters, installed as Import and Export meters, as illustration only.

Schematic Drawing to Show Single Phase Import / Export Metering

Solar Panels

Generated Domestic

Import Meter Export Meter

Schematic Drawing to Show Multi Phase Import / Export Metering Solar Panels

ON ON

OFF OFF Generated Domestic

Import Meter Export Meter

5.25 HALF AND FULL CLARKE CABINETS

Great care must be taken when working on Half Clarke or Full Clarke cabinets because of the following hazards that may be present :

x Risk of foreign debris, eg such as metal objects or chain, stored in the cabinet falling down into the cut out, resulting in a serious flashover.

x Risk of gaps within the panel allowing enough room for fingers to come into direct contact with live terminals resulting in serious electric shock/burns (as per photos below)

Before any work commences a thorough visual risk assessment of inside the cabinet must be undertaken. Where safe to do so all foreign debris must be carefully removed from the bottom of the cabinet. Where any gaps are identified within the cabinet or between the cabinet and the cut out, the Operative must rectify these defects. If it is not OS responsibility to rectify these defects, then AIRline must be informed, so the local DNO can take corrective action.

Exposed live cables behind Test Block

5.26 CONNECTION OF EARTHING SYSTEMS TO CUT OUTS

A visual inspection must be made to establish the correct earthing system to be connected to a cut out. Fig 1 shows a combined neutral and earth. In this case the correct earthing system would be PME (TN-C-S).

Fig 1 Fig 2

The cut out shown in fig 2 has provision for a link bar to be fitted between the neutral and earth connections. This link has been left in the open position and must not be closed. The correct earthing arrangement in this case would be SNE (TN-S).

Where a BNO (business network operator) has installed cut outs in a block of flats fed from the local DNO service intake position, the BNO must always install SNE cut outs as per BS 7671.

If the cut out has a separate neutral and earth (fig 2) the cut out must not be connected to PME (TN-C-S).

Siemens must NOT close the link between neutral and earth on a SNE cut out.

Section 6

CT Operated Metering Commissioning Procedure

6.1 COMPLIANCE REQUIREMENT

The company shall as an approved Meter Operator undertake a commissioning procedure on all CT operated metering equipment, used for settlement purposes in accordance with the MOCOPA.

A commissioning test shall be performed on all new metering equipment, which is to provide metering data for settlements. Where replacement metering equipment is fitted as part of an existing metering system, a commissioning test covering the changes shall be conducted.

The Meter Operator shall provide such evidence to confirm that, following its commissioning, metering equipment shall meet the requirements of the Pooling and Settlement Agency (P&SA) and relevant Codes of Practice. This evidence will include a signed and dated commissioning record.

6.2 GENERAL COMMISSIONING PRINCIPLES

The commissioning procedure shall consist of three main areas:

x Confirming Current Transformer (and Voltage Transformer where applicable) details and configuration information. x Checking metering system functionality and that the installation conforms to the appropriate Code of Practice. x Conducting a load comparison test (where practically possible) against an independent energy recording device.

Please refer to the Safe Working Methods (section 8) in this Code of Practice.

6.3 WORKING PRACTICES

Only approved commissioning procedures shall be undertaken by authorised Meter Operator staff in compliance with the PS&A Code of Practice.

Any wiring, instrument or tool that is damaged or otherwise unsafe shall be withdrawn from service. The wiring, instrument or tool shall either be repaired or replaced.

Any Working Standard used in undertaking the load comparison test shall be calibrated against Reference Standards or Transfer Standards. The records showing the

traceability and previous calibration checks on these standards shall be made available to the Settlement Systems Administrator (SSA) or its agent as required.

6.4 COMMISIONING PROCEDURE

Equipment Identification and Configuration

For all installations with new/replaced measurement transformers, the commissioning report shall include the following information:

a) The installed CT/VT details including, serial numbers, rating, accuracy class b) CT ratio c) VT ratio

For installations with existing measurement transformers, where it is not practically possible to obtain the information related to (a), (b), (c), the commissioning report shall include the VT and CT ratios in use and the method by which this information was obtained, i.e. via on-site inspection or from Distribution (or transmission) Business documentation.

The commissioning procedure shall include checks to confirm the VT & CT connections at the Meter Operator interface (Test Terminal Block) to the Distribution (or transmission) Business are correct. Details of the operational burden and any non-settlement burdens shall be recorded.

6.5 METER(S) CONFIGURATION AND OPERATION

The commissioning report shall include details related to the meter and measurement configuration, including: a) Serial number, accuracy class, programmed CT & VT ratios. b) Register format and initial readings. c) Confirmation of register advance for Import & Export power flows. d) Confirmation of pulse outputs when linked to separate outstations. e) Correct meter operation on each phase independently in addition to normal multiphase current operation. f) Correct operation of both local and remote communication ports where fitted. g) Confirmation that the meter time is set to GMT ±5 seconds.

6.6 LOAD COMPARISON TEST RESULT

The energy value recorded by the meter shall be checked against an independent energy recording device to establish the correct operation of the overall metering system.

Where for practical or safety reasons, only a secondary injection can be undertaken the report shall detail the VT/CT ratio confirmed under section (6.4) above.

6.7 CUSTOMER PULSING CONSIDERATION

WARNING

Before any work is conducted on a CT operated metering installation an investigation shall be undertaken to establish if the metering equipment outputs information to the customer.

If an interface exists between the metering equipment and the customer, no work shall be undertaken on the metering system without liaison with the customer to establish the effect of any changes.

6.8 OPERATIONS AFFECTING PULSE OUTPUTS OR DATA STREAMS

The following list details some of the changes that can affect the pulse output configuration and the data storage values.

1. Change of CT and/or VT ratio programmed into meter 2. Change of meter type/configuration 3. Removal of isolating links in pulse interface circuit 4. Removal of auxiliary supply fuses controlling interface circuitry 5. Secondary current injection for routine test purposes

6.9 CODE OF PRACTICE COMPLIANCE

The metering equipment shall be capable of providing the following pulse outputs as required locally by the customer:

1. Pulsing for Import kWh, Export kWh, Import kVArh, Export kVArh and kVAh. 2. 30 minute reset pulse from voltage free contacts. In addition the customer may have access to the half hourly metering data, provided this is in accordance with the provisions of the P&SA and the agreed procedures. Such access must not interfere with or endanger the security of the data or the collection process for Settlement purposes. Customer access to stored metering data shall only be with the permission of the supplier.

6.10 TYPICAL EXAMPLE OF CT OPERATED METERING (Schematic Diagram 1)

Backup Fuses

If 16A/20A backup fuses are not installed, the installation must be reported to AIRline.

6.11 TYPICAL EXAMPLE OF CT OPERATED METERING (Schematic Diagram 2)

If 16A/20A backup fuses are not installed, the installation must be reported to AIRline.

6.12 ISOLATING LV CUBICLES

a) Where an LV cubical incorporates a moulded case breaker, isolation of the customer’s installation and metering equipment / CTs is via this breaker. Padlocks and safety notices must be attached to prevent unauthorised re- energisation.

b) For those LV cubicles that do not contain a moulded case breaker and are fed direct from an adjoining substation, isolation must be carried out by qualified Distribution Network staff only.

This is a Network Switching Operation that falls under Distribution Network procedures.

6.13 PRESENCE OF VOLTAGE ON A LV TEST BLOCK

When working on the LV test block, care must be taken regarding the unlikely presence of voltage. If a spark is noticed when opening or closing the CT links, checks of the panel wiring must be undertaken to determine if there is a loose termination or a possible open circuit CT, before any more work is carried out.

Section 7

Safe Working Methods Whole Current

7.1 Generic Risk Assessment at the Meter Position

7.2 Generic Risk Assessment of Meter Position and Cut Out (before work commences)

7.3 Working on Single and Multi Phase Cut Outs

7.4 Changing Single Phase Meter Where Access is Gained

7.5 Changing Single Phase Meter Where No Access

7.6 Installation of Single Phase Meters to an Energised Service (New Connections)

7.7 Changing a Multi Phase Meter Where Access to Installation Gained

7.8 Installation of Multi Phase Meters to an Energised Service (New Connections)

7.9 Changing a Single Phase Meter Where the Cut Out is Remote from the Meter Position

7.10 Reconnection of Single Phase Meter

7.11 Reconnection of Multi Phase Meter

7.12 Changing a Single Phase Meter to an Import/Export Meter

7.13 Changing a Multi Phase Meter to an Import/Export Meter

7.14 Installation of single phase whole current sub meter

7.15 Installation of multi phase whole current sub meter

7.16 Installation of Check Meters

7.17 Removal of Check Meters

7.18 De-energisation and Removal of Metering Equipment

7.19 Gas Escape Procedure (Domestic)

7.1 GENERIC RISK ASSESSMENT AT THE METER POSITION It is essential that a generic risk assessment is carried out at the meter position before any work is started. If at anytime during the job a distraction occurs then the operative must re-assess the situation before work continues. This guide of evaluating risk must be applied to every task involving work on a meter or associated equipment.

General Considerations Area of Risk Description Control Measures

Can safe access be gained to the meter position? Considerations to be Remove any restrictions where Access taken into account include: possible and use correct tools, obstructions, height, space restraints, equipment and PPE. difficult to reach, etc.

Can a safe exit be made from the Egress Ensure that egress is always clear. Meter position in case of emergency

Always consider environmental Are conditions wet, dusty, noisy, icy conditions while on site. etc, on site and at the meter position. Environment Be aware of third party vehicles and Wear reflective garments and make machinery. yourself visible whilst on site.

Is there enough light at the meter Ensure that there is adequate lighting Lighting position to enable safe working. to carry out the job safely.

Are there people or animals in the area of work that may cause distractions If distracted always re-assess the People and Animals whilst carrying out the job? situation.

Specific Considerations

Area of Risk Description Control Measures

Is the meter and associated equipment Evaluate the associated risk before Metering Equipment in good condition (physically and proceeding with any work. electrically)?

Check if correct size and fit for Are the customer’s load tails suitable purpose. Cables for use and comply with BS 7671? Evaluate panel wiring and replace as Inspect panel wiring. necessary.

Check for any voltage on any Using a neon testoscope confirm Extraneous metalwork surrounding metalwork there is no voltage present

Consider the age of the installation Treat asbestos in accordance with Asbestos when evaluating the presence of company policy. asbestos.

Direct electrical Can the cut out, meter or other live Use appropriate shrouds and/or contact contacts be shrouded? shrouding material.

7.2 GENERIC RISK ASSESSMENT AT THE METER POSITION AND CUT OUT (BEFORE WORK COMMENCES)

Considerations Area of Risk Description Control Measures Carry out a visual inspection and note Evaluate the associated risk before General Damage any obvious damage to any equipment. proceeding with any work. Ensure that any door enclosure can be easily opened or removed without Note any gas, water or steel structure contact to any metallic surface. Proximity of the cut out that may restrict the removal of the cut Insulate surfaces where reasonably to metallic objects out fuse. practicable.

Inform AIRline if the work cannot go ahead. Check for leakage of voltage around the cut out and equipment using an Are there any signs of dampness or approved neon tester. Water and dampness water marks around the cut out and equipment. Wear the appropriate PPE when it is deemed safe to continue with the work. If tampering is suspected then Inspect the seals for signs of contact AIRline immediately. tampering. If voltage is detected, where Seals possible, carry out further tests using Test seals for leakage of voltage with test lamps. If unsure contact your an approved neon tester. Line Manager. Do not try to remove the cut out fuse If leaking compound is excessive, then with pliers or other mechanical aids. Leaking compound tracking of compound up the fuse If the fuse cannot be removed whilst carrier may be evident. wearing appropriate PPE by hand, then inform AIRline. If there are signs of burning to cables, Before physically inspecting the area meters, associated equipment or the of burning always ensure that the Sign of burning cut out, then approach the work with installation is de-energised where extra caution. reasonably practicable. If damage to the Network Cable has occurred, then contact AIRline. Visually inspect all cables for signs of

Cable damage damage or breakdown of insulation Where damage to customer tails has including the incoming Network Cable. occurred, then follow the guidance as per this COP. Re-fix if safe to do so. Refer to section 5.8 Ensure that the board is securely fixed to the wall. Refer to section 2.22 Meter board If cement based, treat as asbestos. Replace meter board if the cut out is If the board is rotten, treat with caution not on the board. as the cut out fuse may prove difficult to remove. Support cut out base while removing fuse carrier. Inform AIRline if the DNO need to attend.

7.3 WORKING ON SINGLE AND MULTI PHASE CUT OUTS

No Action Detail

General risk A general risk assessment must be carried out in accordance with Safe 1 assessment Working Method 7.1.

A specific visual inspection to evaluate the risks must be conducted in Specific visual accordance with Safe Working Method 7.2. if at this stage it is deemed that 2 inspection of the cut the meter board contains Asbestos then the job will be aborted and AIRline out and meter position informed.

Eye protection must be Eye protection MUST be worn when working on all domestic and industrial worn before working on type cut outs or when carrying out tasks that involve a risk of eye injury. 3 single and multi phase Pitted or scratched lenses are dangerous and should be replaced cut outs immediately.

Test for voltage on the Using an approved neon testoscope, test for voltage on the cut out seals. If 4 cut out seals voltage is detected diagnose where voltage source is from i.e. dampness, if (ALL CUT OUT TYPES) this cannot be determined contact Line Manager and seek advice.

Test for voltage on the Using an approved neon testoscope, test for voltage on the casing of the cut casing of the cut out. out. If voltage is detected diagnose where voltage source is from i.e. 5 (METAL CLAD CUT dampness, if this cannot be determined call AIRline and seek advice from a OUT ALL TYPES) Line Manager.

Insulated cut outs Metal Clad cut outs Single & Phase Industrial type Single & Three Phase Three Phase Cut outs (All Insulated)

Remove the cut out seals Remove the cut out seals Remove the cut out seals

Care must be taken to Care must be taken to ensure Care must be taken to ensure that ensure that sealing wire or that sealing wire or debris does sealing wire or debris does not fall debris does not fall into any not fall into any gaps in the cut into any gaps in the cut out. gaps in the cut out. out.

Ensure that any debris is Ensure that any debris is Ensure that any debris is removed from around the removed from around the top of removed from around the top of top of the cut out i.e. the cut out i.e. disused sealing the cut out i.e. disused sealing disused sealing wire, cable wire, cable strands or foreign wire, cable strands or foreign strands or foreign objects. objects. objects.

Open the cut out Open the cut out enclosure Open the cut out enclosure enclosure door door door

Approved insulated gloves Approved insulated gloves Approved insulated gloves Must Must be worn at all times Must be worn at all times whilst be worn at all times whilst whilst carrying out this carrying out this operation. carrying out this operation. operation. Be aware of any obstacles that Be aware of any obstacles that Be aware of any obstacles may prevent the enclosure may prevent the enclosure being that may prevent the being opened i.e. gas pipes or opened i.e. gas pipes or other enclosure being opened i.e. other electrical cables. electrical cables. gas pipes or other electrical cables.

Visually inspect the fuse Visually inspect the fuse Visually inspect the fuse chamber and fuse carrier chamber and fuse carrier chamber and fuse carrier before withdrawing the before withdrawing the cut before withdrawing the cut out cut out fuse out fuse fuse

Before the fuses are Before the fuses are withdrawn Before the fuses are withdrawn withdrawn visually inspect visually inspect the fuse visually inspect the fuse chamber the fuse chamber and chamber and carrier for and carrier for damage or signs of carrier for damage or signs damage or signs of stress as stress as per Safe Working of stress as per Safe per Safe Working Method 7.2. Method 7.2. Working Method 7.2. Ensure that all fuse barriers are Ensure that all fuse barriers are in Ensure that all fuse barriers in place. place. are in place.

Remove the cut out fuse Remove the cut out fuse Remove the cut out fuse (approved insulated (approved insulated gloves (approved insulated gloves gloves MUST be worn for MUST be worn for this MUST be worn for this this operation) operation) operation)

On removal inspect the On removal inspect the carrier On removal inspect the carrier for carrier for signs of stress or for signs of stress or damage. signs of stress or damage. damage. Visually inspect the fuse size to Visually inspect the fuse size to Visually inspect the fuse ascertain it matches the ascertain it matches the size to ascertain it matches installation in accordance with installation in accordance with the installation in 5.14 of this Code of Practice 5.14 of this Code of Practice accordance with 5.14 of this Code of Do not use any mechanical Do not use any mechanical Practice aids to remove the fuse aids to remove the fuse carrier. carrier. Do not use any mechanical aids to remove the fuse carrier.

Fuse barriers Fuse barriers Fuse barriers

Carry out a visual inspection and Carry out a visual inspection and Carry out a visual inspection and note any obvious damage to or note any obvious damage to or note any obvious damage to or absence of fuse barriers. absence of fuse barriers. absence of fuse barriers.

If barriers are missing from the cut If barriers are missing from the If barriers are missing from the cut out report to AIRline and abort job. cut out report to AIRline and out report to AIRline and abort job. abort job.

Inspection of the fuse carrier Inspection of the fuse carrier Inspection of the fuse carrier

Look for signs of stress or Look for signs of stress or damage. Look for signs of stress or damage. Take note of any Take note of any discoloration of damage. Take note of any discoloration of the fuse prongs, the fuse prongs, as this could discoloration of the fuse prongs, as as this could indicate loose or indicate loose or damaged this could indicate loose or damaged connections. connections. damaged connections.

Check the carrier has the correct Check the carrier has the correct Check the carrier has the correct size fuse for the installation size fuse for the installation size fuse for the installation

Check terminals and fuse Check terminals and fuse holders Check terminals and fuse holders holders for tightness. for tightness. for tightness.

Inform AIRline if the work cannot Inform AIRline if the work cannot go Inform AIRline if the work cannot go ahead. ahead. go ahead.

Change fuse where necessary Change fuse where necessary Change fuse where necessary

Presence of asbestos Presence of asbestos Presence of asbestos

Inspect old switch gear as it may Inspect old switch gear as it may Inspect old switch gear as it may contain asbestos including the contain asbestos including the fuse contain asbestos including the fuse fuse carriers carriers carriers

Wear FFP3 face mask where Wear FFP3 face mask where Wear FFP3 face mask where presence of asbestos is presence of asbestos is suspected. presence of asbestos is suspected. suspected.

Cut out chamber/base Cut out chamber/base Cut out chamber/base

Inspect the cut out Inspect the cut out chamber/base Inspect the cut out chamber/base chamber/base for signs of for signs of overheating, loose for signs of overheating, loose overheating, loose terminals and terminals and excessive debris. terminals and excessive debris. excessive debris. Ensure that compound is not Ensure that compound is not Ensure that compound is not tracking up the fuse holder. tracking up the fuse holder. tracking up the fuse holder.

If signs of overheating are If signs of overheating are present If signs of overheating are present

present on the incoming side of on the incoming side of the cut out, on the incoming side of the cut out, the cut out, this must be referred this must be referred to AIRline. this must be referred to AIRline. to AIRline. If compound is present, ensure that If compound is present, ensure that If compound is present, ensure sound electrical contact is made sound electrical contact is made that sound electrical contact is between the fuse carrier and holder between the fuse carrier and holder made between the fuse carrier on re-energisation. on re-energisation. and holder on re-energisation.

Cut out terminals Cut out terminals Cut out terminals

All terminals must be tight as not All terminals must be tight as not to All terminals must be tight as not to to cause overheating. cause overheating. cause overheating.

Functional tightness of outgoing Functional tightness of outgoing Functional tightness of outgoing terminals must take place on all terminals must take place on all terminals must take place on all work. Exception to this is the work. Exception to this is the work. Exception to this is the incoming live terminals, if it is incoming live terminals, if it is incoming live terminals, if it is deemed that these are loose, deemed that these are loose, then it deemed that these are loose, then then it must be reported to must be reported to AIRline and it must be reported to AIRline and AIRline and DNO must attend. DNO must attend. DNO must attend.

Confirm the polarity of the Confirm the polarity of the Confirm the polarity of the cut out. cut out. cut out.

The polarity of the cut out The polarity of the cut out must The polarity of the cut out must must be confirmed using an be confirmed using an be confirmed using an approved testing device. approved testing device. approved testing device.

Shroud live terminals Shroud Live Terminals Shroud Live Terminals

Shroud all live incoming Shroud all live incoming Shroud all live incoming terminals with approved terminals by closing the cut out terminals by closing the cut out shrouds enclosure or door. enclosure or door.

When work is required inside When work is required inside or When work is required inside or or around the cut out i.e. around the cut out i.e. changing around the cut out i.e. changing changing tails then approved tails then approved shrouds or tails then approved shrouds or shrouds or shrouding shrouding material should be shrouding material should be material should be used used where reasonably used where reasonably where reasonably practical practical to prevent direct practical to prevent direct to prevent direct contact. contact. contact.

Approved insulated gloves Approved insulated gloves Approved insulated gloves MUST be worn when MUST be worn when MUST be worn when shrouding shrouding shrouding

Replacing the cut out fuse Replacing the cut out fuse Replacing the cut out fuse (approved insulated gloves and (approved insulated gloves (approved insulated eye protection MUST be worn and eye protection MUST be gloves and eye protection when carrying out this worn when carrying out this MUST be worn when operation) operation) carrying out this operation) Before the cut out fuse is replaced Before the cut out fuse is ensure that all fuse barriers are in replaced ensure that all fuse Before the cut out fuse is place and they are in good barriers are in place and they replaced ensure that all fuse condition. are in good condition. barriers are in place and they are in good condition.

Align the fuse blades with the Align the fuse blades with terminals inside the cut out, the terminals inside the cut Align the fuse blades with insert into the dead terminal out, insert into the dead the terminals inside the first then push the fuse carrier terminal first then push the cut out, insert into the firmly into the live terminal. fuse carrier firmly into the dead terminal first then live terminal. push the fuse carrier firmly into the live terminal.

Replace covers securely and Replace covers securely Replace covers securely ensure all seals applied as and ensure all seals applied and ensure all seals necessary as necessary applied as necessary

Take extra care when Take extra care when removing Take extra care when removing removing the lid from the lid from trunking to facilitate the lid from trunking to facilitate trunking to facilitate the the marking of tails as cables the marking of tails as cables marking of tails as cables may may spring forward. may spring forward. spring forward.

7.4 CHANGING A SINGLE PHASE METER WHERE ACCESS IS GAINED

No Action Detail

General risk A general risk assessment must be carried out in accordance with Safe 1 assessment Working Method 7.1.

On access to the installation the polarity must be tested at one of the socket outlets using an approved plug in polarity testing device with an audible tone. If at this stage the polarity is incorrect then another socket Plug in test at socket must be tested, if this socket is also reversed AIRline and the Line 2 outlet Manager must be contacted immediately. If it is evident that only one socket is reversed the work can continue. The appropriate “DO NOT USE” sticker must be applied to the socket and a fault card left with the customer.

Specific visual A specific visual inspection to evaluate the risks must be conducted in 3 inspection of the meter accordance with Safe Working Method 7.2. position

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at: Polarity indication Incoming cut out fuse 4 x check x Cut out to meter live cable x Outgoing live tail to customers installation x All neutral cables must be tested for zero voltage If the polarity is reversed at one of the above positions contact a Line Manager immediately.

The customer must be asked to power down their equipment before the main switch is turned off. Note the main switch positions as some switches 5 Power down may already be in the OFF position and must remain in the OFF position on re energisation.

Remove the main fuse On removal of the main fuse a full assessment of the condition of the fuse (insulated gloves and carrier must be undertaken in accordance with Safe Working Method 7.3. 6 eye protection must be

worn)

Confirm polarity at the Using an approved volt stick confirm the polarity on the incoming live

cut out with main fuse terminal of the cut out. 7 carrier removed Note: If volt stick fails, use approved neon testoscope. The incoming live terminal must then be shrouded (where practicable).

Remove terminal Remove meter terminal cover’s and prove the meter dead using an cover’s and prove the approved test lamp; the lamp must be proved before and after the test 8 meter DEAD either using the proving unit supplied with the test lamp or on a known live supply.

Apply permanent x Incoming and outgoing tails to be marked with one marker, both polarity markers live and neutral. x Off peak circuits must be identified with two markers. 9 Tails should be marked before removing them from the meter. NB: If the tails cannot be marked while still connected to the meter, they must be marked individually as they are removed from the terminal.

Change the Ensure that the correct meter and tariff are being installed as per the job

meter/associated instruction. When working at a multi service position installation with the 10 equipment tails removed from the meter, check for back feeds using a volt stick.

Tightness check Ensure that all terminals are tight including the out-going side of the cut 11 out and neutral block and other associated equipment terminals.

Glow test After the installation of the new meter and with the customer’s main switch

in the off position, conduct a Glow Test in accordance with guidance in 12 4.15 of this COP.

Visual inspection Visually inspect the installation ensuring that cable colours, cable markers 13 and sequence of cables are all correct.

Replace terminal covers Replace the terminal covers and install the main fuse into the cut out and re-energise ensuring that the fuse is inserted into the dead side of the cut out first and installation (insulated then the live contact second where applicable. 14 gloves and eye protection must be worn)

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at: x Incoming cut out fuse 15 Polarity indication x Cut out to meter live cable check x Meter to consumers main switch live x All neutral cables must be tested for zero voltage If the polarity is reversed at one of the above positions contact a Line Manager immediately.

Final visual checks Visually inspect the work carried out and confirm that the installation is 16 safe, cables marked and wired correctly.

Switch on customers Inform the customer that the installation is to be re-energised. Ensure that

main switch all main switches are turned back ON. Switches that where in the OFF 17 position at the start of the job must remain in the OFF position.

Plug in test at a socket Test the same socket on the customer’s installation that was tested in

outlet and affix witness stage 2 of this procedure. The installation must be left in the state of 18 label correct polarity. Ask the customer to witness the plug in test.

Seal equipment and Leave the old and new meter details on the appropriate card at the meter 19 leave meter readings position. Seal all equipment and remove any waste material.

7.5 CHANGING A SINGLE PHASE METER WHERE NO ACCESS (APPOINTMENT HAS BEEN MADE WITH THE CUSTOMER)

Note – Meters MUST NOT be changed on cold calls if the customer is not present

No Action Detail

General risk A general risk assessment must be carried out in accordance with Safe 1 assessment Working Method 7.1.

Specific visual

inspection of the meter A specific visual inspection to evaluate the risks must be conducted in 2 position accordance with Safe Working Method 7.2

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at:

Incoming cut out fuse Polarity indication x 3 Cut out to meter live cable check x x Outgoing live tail to customers installation x All neutral cables must be tested for zero voltage

If the polarity is reversed at one of the above positions contact a Line Manager immediately.

The load on the meter must be assessed to be below 5 Amps before the main fuse is withdrawn. If it is deemed excessive, re-evaluate if the customer is present at the property. Providing no cabling needs to be 4 Load on the meter changed and no auxiliary equipment needs to be removed the job can go ahead. If there is auxiliary equipment the job should be aborted until customer is present.

Remove the main fuse

(insulated gloves and On removal of the main fuse a full assessment of the condition of the fuse 5 eye protection must be carrier must be undertaken in accordance with Safe Working Method 7.3 worn)

Using an approved volt stick confirm the polarity on the incoming live Confirm polarity at the terminal of the cut out. 6 cut out with main fuse Note: If volt stick fails, use approved neon testoscope. carrier removed The incoming live terminal must then be shrouded (where practicable).

Remove meter terminal cover’s and prove the meter dead using an Remove terminal cover approved test lamp; the lamp must be proved before and after the test 7 and prove the meter either using the proving unit supplied with the test lamp or on a known live DEAD supply.

x Incoming and outgoing tails to be marked with one marker, both live and neutral.

Apply permanent x Off peak circuits must be identified with two markers. 8 Tails should be marked before removing them from the meter. NB: If the polarity markers tails cannot be marked while still connected to the meter, they must be marked individually as they are removed from the terminal.

Refer to section 4.4 of this Code of Practice

Confirm Inner Core It is essential to gain access to confirm Polarity where the inner cores do 9 Colours not match the meter terminals. If customer tails are undersized fit isolator. (Section 5.3)

Change the Ensure that the correct meter and tariff are being installed as per the job

meter/associated instruction. When working at a multi service position installation with the 10 equipment tails removed from the meter, check for back feeds using a volt stick.

Ensure that all terminals are tight including the out-going side of the cut 11 Tightness check out and neutral block.

After the installation of the new meter and with the customer’s tails

disconnected, conduct a Glow Test in accordance with guidance in 4.15 of 12 Glow test this COP.

Reconnect the customer’s tails into the meter/isolator taking note of the Reconnect customers 13 cable markers. tails

Visually inspect the installation ensuring that cable colours, cable markers 14 Visual inspection and sequence of cables are all correct.

Replace terminal covers and re-energise installation (insulated gloves and eye Replace the appropriate terminal covers and install the main fuse into the 15 protection must be cut out ensuring that the fuse is inserted into the dead side of the cut out worn first and then the live contact second. Inserting/Removing fuses )

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at:

Incoming cut out fuse Polarity indication x 16 Cut out to meter live cable check x x Meter to consumers main switch live x both sides of isolator if installed x All neutral cables must be tested for zero voltage If the polarity is reversed at one of the above positions contact a Line Manager immediately.

Visually inspect the work carried out and confirm that the installation is safe, cables marked and wired correctly.

17 Final visual checks Complete witness sticker and write “CPN” (Customer Not Present)

Seal equipment and Leave the old and new meter details on the appropriate card at the meter 18 leave meter readings position. Seal all equipment and remove any waste material.

7.6 INSTALLATION OF SINGLE PHASE METERS TO AN ENERGISED SERVICE (NEW CONNECTIONS)

No Action Detail

General risk A general risk assessment must be carried out in accordance with Safe 1 assessment Working Method 7.1.

Operatives may be requested to attend a site induction by the site Manager; this is to fulfil Health and Safety legislation. On all occasions 2 Site induction when visiting a site the Operative MUST sign in and let the site representative know he/she is on site.

A specific visual inspection to evaluate the risks must be conducted in Specific visual accordance with Safe Working Method 7.2.

inspection of the meter 3 position For areas of special risk, i.e. building site temporary supplies refer to 4.12 of this Code of Practice

Remove the main fuse

(insulated gloves and On removal of the main fuse a full assessment of the condition of the fuse 4 eye protection must be carrier must be undertaken in accordance with Safe Working Method 7.3 worn)

Prove the supply at the cut out using an approved test lamp; the lamp

Confirm supply at the must be proved before and after the test either using the proving unit 5 cut out supplied with the test lamp or on a known live supply.

Using an approved volt stick confirm the polarity on the incoming live terminal of the cut out. Confirm polarity at the 6 cut out with main fuse Note: If volt stick fails, use approved neon testoscope. carrier removed The incoming live terminal must then be shrouded (where practicable).

Install Meter and Isolator Test / Inspect and Connect

Conduct a visual inspection of the installation x for its compliance with:

ESQC Regs 2002 BS 7671 PME Requirements

x Validate ELZ reading at the cut out. x Validate ELZ reading at the cut out. TN-C-S (PME) = < 0.38 ohms TN-C-S (PME) = < 0.38 ohms TN-S (Sheath) = < 0.8 ohms TN-S (Sheath) = < 0.8 ohms DNO variations may apply please refer to DNO variations may apply please refer to Earthing Earthing Guidance Notes Guidance Notes x Install metering equipment, isolator and PME x Install metering equipment and connect earth block. DO NOT connect any of the customer tails if compliant with above. Ensure customer’s tails or earthing. Ensure that all that all terminals are tight including the out going terminals are tight including the out-going side side of the cut out and neutral block. of the cut out and neutral block. N.B. If the above requirements are not met take appropriate action as per contractual requests and leave appropriate fault card with site representative. x Mark the cables with approved markers x Mark the cables with approved markers

x Remove consumer unit cover and visually inspect that customer’s tails are connected. x Conduct a Glow Test in accordance with x Conduct a Glow Test in accordance with guidance in 4.15 of this COP. guidance in 4.15 of this COP. x Energise the installation after replacing x Energise the installation after replacing terminal terminal covers. (Insulated gloves and eye covers leaving the consumer unit in the off protection must be worn) position. (Insulated gloves and eye protection must be worn) x Polarity Indication Check x Polarity Indication Check The polarity indication test must be conducted using The polarity indication test must be conducted using an approved volt stick. The volt stick must be an approved volt stick. The volt stick must be proved proved operational by testing on the live supply. operational by testing on the live supply.

Indication of polarity must be conducted at: Indication of polarity must be conducted at:

x Incoming cut out fuse x Incoming cut out fuse x Cut out to meter live cable x Cut out to meter live cable x Meter to Isolator All neutral cables must be tested for zero voltage All neutral cables must be tested for zero voltage

Confirm the supply on the contractors side of Confirm the supply at the incoming terminals of the isolator using an approved test lamp, the lamp the consumer unit using an approved test lamp, the must be proved before and after the test using the lamp must be proved before and after the test using proving unit supplied with the test lamp, in the proving unit supplied with the test lamp, in accordance with guidance in 4.20 of this COP. accordance with guidance in 4.20 of this COP.

x Confirm the polarity on the contractors side x Confirm the polarity at the consumer unit of the isolator using an approved volt stick / (including off peak switches) with switch in neon tester. the off position. Replace cover and leave isolator in the off x Where polarity cannot be confirmed using a volt position. stick with the consumer unit cover in situ ensure that the main switch, breakers/fuses are off/removed before removing the consumer unit cover. Confirm polarity at the incoming cable connections. x Attach appropriate labels/stickers and seal x Attach appropriate labels/stickers and seal all all equipment. equipment.

- Disclaimer must be screwed to meter board - Disclaimer must be screwed to meter board - PME Earth Label - PME Earth Label - Witness sticker - Witness sticker x Leave the new meter details on the x Leave the new meter details on the appropriate appropriate card at the meter position. Remove card at the meter position. Remove any waste any waste material material

7.7 CHANGING A MULTI PHASE METER WHERE ACCESS TO INSTALLATION GAINED

No Action Detail

A general risk assessment must be carried out in accordance with Safe General risk 1 Working Method 7.1. assessment

Plug in test at socket must be tested, if this socket is also reversed AIRline and the Line 2 outlet Manager must be contacted immediately. If it is evident that only one socket is reversed the work can continue. The appropriate “DO NOT USE” sticker must be applied to the socket and a fault card left with the customer.

Specific visual

inspection of the meter A specific visual inspection to evaluate the risks must be conducted in 3 position accordance with Safe Working Method 7.2.

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply.

Indication of polarity must be conducted at:

Incoming cut out fuses Polarity indication x 4 Cut out to meter live cables check x x Outgoing live tails to customers installation x All neutral cables must be tested for zero voltage

If the polarity is reversed at one of the above positions contact a Line Manager immediately.

The customer must be asked to power down their equipment before the main switch is turned off. Note the main switch positions as some switches

may already be in the OFF position and must remain in the OFF position 5 Power down on re energisation. Ask the customer or their representative if they have a generator that may start after the installation is de-energised.

Remove the main fuses. (Insulated gloves and On removal of the main fuses a full assessment of the condition of the fuse 6 eye protection must be carrier’s must be undertaken in accordance with Safe Working Method 7.3. worn)

Using an approved volt stick confirm the polarity on the incoming live Confirm polarity at the terminals of the cut out. 7 cut out with main fuse Note: If volt stick fails, use approved neon testoscope. carriers removed The incoming live terminal must then be shrouded (where practicable).

Remove terminal cover Remove terminal cover from meter, re-energise and confirm the phase off the meter, re- sequence of the meter using an approved PSI. The phase sequence will energise and confirm be either:

the phase sequence 8 (Insulated gloves and Standard ABC – RYB – L1 L2 L3 eye protection must be Non Standard BAC – YRB – L2 L1 L3 worn)

Prove the meter dead using an approved test lamp; the lamp must be

proved before and after the test either using the proving unit supplied with De-energise and prove the test lamp or on a known live supply. Special consideration must be dead (Insulated gloves 9 given to the possibility of back feeds via a generator. and eye protection

must be worn) The incoming live terminals must be shrouded (where practicable).

Non Standard Phase Sequence Standard Phase Sequence

Mark the incoming and outgoing tails in pairs Ensure that in this situation that the pairs of tails are using the approved markers L1- L2- L3 and N. identified (incoming and outgoing). Mark the tails NB: If the tails cannot be marked while still across the meter as L1-L3-L2 and N. connected to the meter, they must be marked NB: If the tails cannot be marked while still individually as they are removed from the connected to the meter, they must be marked terminal. individually as they are removed from the terminal.

Change the meter ensuring that the pairs stay Change the meter ensuring that the tails are together L1-L2-L3-N in their respective pairs. connected as L1-L2-L3-N in their respective pairs.

Carry out a visual inspection Carry out a visual inspection

Ensure that all terminals are tight including the Ensure that all terminals are tight including the outgoing side of the cut out and neutral block and outgoing side of the cut out and neutral block and any any other associated equipment terminals other associated equipment terminals

Conduct a Glow Test on each phase of the meter Conduct a Glow Test on each phase of the meter in in accordance with guidance on 4.15 of this COP. accordance with guidance in 4.15 of this COP.

Conduct a One Fuse Test on each phase of the Conduct a one fuse test on each phase of the meter meter in accordance with guidance on 4.16 of this in accordance with guidance on 4.16 of this COP. COP. (Insulated gloves and eye protection must be (Insulated gloves and eye protection must be worn worn Inserting/Removing fuses) Inserting/Removing fuses)

Re-Energise and Confirm the Phase Sequence at Re-Energise and Confirm the Phase Sequence is meter terminals (Insulated gloves and eye Standard at meter and main switch (Insulated protection must be worn Inserting/Removing fuses) gloves and eye protection must be worn Inserting/Removing fuses)

De-Energise and replace meter terminal cover De-Energise and replace meter terminal cover (Insulated gloves and eye protection must be worn (Insulated gloves and eye protection must be worn when Inserting/Removing fuses) when Inserting/Removing fuses)

Final visual checks Visually inspect the work Final visual checks Visually inspect the work carried carried out and confirm that the installation is safe, out and confirm that the installation is safe, cables cables marked and wired correctly. marked and wired correctly.

Re-energise(Insulated gloves and eye protection Re-Energise(Insulated gloves and eye protection must be worn) must be worn)

Turn on main switches as appropriate after Turn on main switches as appropriate after informing the customer or the customer’s informing the customer or the customer’s representative. representative.

Plug in test at a socket outlet and affix witness Plug in test at a socket outlet and affix witness label label Test the same socket on the customer’s installation Test the same socket on the customer’s installation that was tested in stage 2 of this procedure. The that was tested in stage 2 of this procedure. The installation must be left in the state of correct installation must be left in the state of correct polarity. polarity. Ask the customer to witness the plug in Ask the customer to witness the plug in test. Sign test. Sign and affix the witness label. and affix the witness label.

Ensure with customer that multi phase equipment Ensure with customer that multi phase equipment operates correctly operates correctly

Seal equipment and leave meter readings. Leave Seal equipment and leave meter readings. Leave the old and new meter details on the appropriate the old and new meter details on the appropriate card card at the meter position. Seal all equipment and at the meter position. Seal all equipment and remove remove any waste material. any waste material.

7.8 INSTALLATION OF MULTI PHASE METERS TO AN ENERGISED SERVICE (NEW CONNECTIONS)

No Action Detail

General risk A general risk assessment must be carried out in accordance with Safe 1 assessment Working Method 7.1.

Operatives may be requested to attend a site induction by the site Manager, this is to fulfil Health and Safety legislation. On all occasions 2 Site induction when visiting a site the Operative MUST sign in and let the site Representative know he/she is on site.

A specific visual inspection to evaluate the risks must be conducted in

accordance with Safe Working Method 7.2 Specific visual

inspection of the meter 3 For areas of special risk, i.e. building site temporary supplies refer to position 4.12 of this Code of Practice

Remove the main fuses.

(Insulated gloves and On removal of main fuse a full assessment of the condition of the fuse 4 eye protection must be carrier’s must be undertaken in accordance with Safe Working Method 7.3. worn)

Prove the supply at the cut out using an approved test lamp; the lamp Confirm supply at the must be proved before and after the test either using the proving unit cut out. 5 supplied with the test lamp or on a known live supply. (phase to phase and

phase to neutral)

Using an approved volt stick confirm the polarity on the incoming live

terminal of the cut out. Confirm polarity at the

6 cut out with main fuse Note: If volt stick fails, use approved neon testoscope. carrier removed

Using an approved Phase Sequence Indicator (PSI), confirm the phase

sequence of the incoming live terminals of the cut out. The incoming live Confirm phase 7 terminal must be shrouded (where practicable). sequence at the cut out

Install Meter and Isolator (not contractually Test / Inspect and Connect required)

x Conduct a visual inspection of the installation for its compliance with:

ESQC Regs 2002 BS 7671 PME Requirements

x Validate ELZ reading at the cut out

TN-C-S (PME) = < 0.35 ohms TN-S (Sheath) = < 0.8 ohms DNO variations may apply please refer to Earthing Guidance Notes

Install meter and any other associated equipment

Ensure that all terminals are tight including the outgoing side of the cut out and neutral block.

Mark the cables with approved markers L1-L2-L3-N connect customer’s tails as appropriate ensuring standard phase sequence at the meter

Conduct a Glow Test in accordance with guidance in 4.15 of this COP.

Conduct a one fuse test on each phase of the meter in accordance with 4.16

Visually inspect the installation ensuring that cable colours, cable markers and sequence of cables are all correct

Remove distribution board covers where practicable

Energise the installation

Confirm phase sequence at the meter and associated equipment using a PSI

Confirm supply (where practicable) at the: - Distribution Board using an approved test lamp; the lamp must be proved before and after the test either using the proving unit supplied with the test lamp or on a known live supply. (all breakers off or fuses out and main switch in the on position)

Confirm phase rotation (where practicable) at the: - Distribution Board using a phase sequence indicator (PSI) (all breakers off or fuses out and main switch in the on position)

Conduct a polarity indication test (where practicable) at the: - Distribution Board using a volt stick (all breakers off or fuses out and main switch in the on position)

De-energise supply and replace ALL covers to the meter, distribution board and associated equipment

Re-energise installation

Attach appropriate labels/stickers and seal all equipment.

- Disclaimer must be screwed to meter board - PME Earth Label - Witness sticker

Leave the new meter details on the appropriate card at the meter position. Remove any waste material

7.9 CHANGING A SINGLE PHASE METER WHERE THE CUT OUT IS REMOTE FROM THE METER POSITION

No Action Detail

A general risk assessment must be carried out in accordance with Safe General risk 1 Working Method 7.1. assessment

Manager must be contacted immediately. If it is evident that only one Plug in test at socket 2 socket is reversed the work can continue. The appropriate “DO NOT USE” outlet sticker must be applied to the socket and a fault card left with the customer.

* If No Access to installation proceed to Stage 3 below

Specific visual

inspection of the meter A specific visual inspection to evaluate the risks must be conducted in 3 position accordance with Safe Working Method 7.2

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at:

Polarity indication Incoming and outgoing live meter tails 4 x check x All neutral cables must be tested for zero voltage

If the polarity is reversed at the above position contact a Line Manager immediately.

The customer must be invited to power down their appliances before the main switch is turned off. Note the main switch positions as some switches may already be in the OFF position and must remain in the OFF position 5 Power down on re-energisation.

x If No Access to installation proceed to Stage 6 below

Identify the location from where the meter is fed. This would normally be a locked multi-way intake position situated in another room or cupboard either within the building or outside. If the source of supply (fuse carrier) to Remove the main fuses. the meter cannot be located the job must be terminated until more site-

(Insulated gloves and specific information becomes available. 6 eye protection must be The use of a “fuse finder” may be applicable in certain circumstances. worn) On removal of the main fuse a full assessment of the condition of the fuse carrier’s must be undertaken in accordance with Safe Working Method 7.3.

Using an approved volt stick confirm the polarity on the incoming live Confirm polarity at the terminal of the cut out. 7 cut out with main fuse Note: If volt stick fails, use approved neon testoscope. carrier removed

To ensure that no other person (e.g. distribution operative or site caretaker etc) accidentally re-energises the rising main from the intake position it is important that the fuse is removed from the fuse carrier and kept with the operative. The empty fuse carrier must be replaced in the cut out and sealed.

Appropriate safety notices must be displayed warning that work is being Warning signage and carried out on the installation.

securing the intake 8 position against Covers/doors on multi-ways/service heads must be replaced to shield any unauthorised entry exposed live terminals and appropriate warning signage must be attached at the supply position. Where practicable the intake room/cupboard should be re-locked to prevent unauthorised access.

If the intake room is deemed to be at risk of entry by unauthorised persons (inc. children) while the work is being carried out, consideration must be given to sealing up any removable covers with high security seals.

Remove meter terminal cover’s and prove the meter dead using an Remove terminal cover approved test lamp; the lamp must be proved before and after the test 9 and prove the meter either using the proving unit supplied with the test lamp or on a known live DEAD supply.

x Incoming and outgoing tails to be marked with one marker, both live and neutral.

Apply permanent x Off peak circuits must be identified with two markers. 10 Tails should be marked before removing them from the meter. NB: If the polarity markers tails cannot be marked while still connected to the meter, they must be marked individually as they are removed from the terminal.

Ensure that the correct meter and tariff are being installed as per the job Change the instruction. When working at a multi service position installation with the 11 meter/associated tails removed from the meter, check for back feeds using a Volt Stick. equipment

Ensure that all terminals are tight including the out-going side of the cut 12 Tightness test out and neutral block and other associated equipment

With the customer’s main switch(es) already in the OFF position put Test Lamp probes across cut out terminals and carry out Glow Test. See 4.15 15 Glow test of this COP. If No Access to installation proceed to Stage 16

Visually inspect the meter installation ensuring that cable colours, polarity 13 Visual inspection markers and sequence of cables are all correct.

Fit terminal cover to meter before re-energising supply at remote service 14 Fit terminal cover intake location.

Re-energise installation Install the main fuse into the cut out ensuring that the fuse is inserted into (Insulated gloves and the dead side of the cut out first and then the live contact second where 16 eye protection must be applicable. worn)

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at: Polarity indication x Incoming cut out fuse check x Cut out to meter live cable x Outgoing live tail to customers installation 17 x All neutral cables must be tested for zero voltage If the polarity is reversed at one of the above positions contact a Line Manager immediately.

Visually inspect the work carried out and confirm that the installation is 18 Final visual checks safe and wired correctly

Where applicable ensure that all customer’s main switches are turned

Switch on customer’s back ON. Switches that where in the OFF position at the start of the job 19 main switch must remain in the OFF position.

Test the same socket on the customer’s installation that was tested in Plug in test at a socket stage 2 of this procedure. The installation must be left in the state of 20 outlet and affix witness correct polarity. Ask the customer to witness the plug in test. Sign and affix label the witness label.

Seal equipment and Leave the old and new meter details on the appropriate card at the meter 21 leave meter readings position. Seal all equipment and remove any waste material.

7.10 RECONNECTION OF SINGLE PHASE METER

No Action Detail

General risk A general risk assessment must be carried out in accordance with Safe 1 assessment Working Method 7.1

Specific visual

inspection of the meter A specific visual inspection to evaluate the risks must be conducted in 2 position accordance with Safe Working Method 7.2

The polarity indication test must be conducted using an approved volt stick. The Volt Stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at.

Polarity indication Incoming cut out fuse 3 x check x All neutral cables must be tested for zero voltage

If the polarity is reversed at any one of the above positions. Contact a Line Manager.

Conduct a visual inspection of the installation for its compliance with. Specific visual ESQC Regs 2002 4 inspection of the BS 7671 PME Requirements installation

Ensure all the customers switches are in the off position 5 Main switches

Remove the main fuse.

(Insulated gloves and On removal of the main fuse a full assessment of the condition of the fuse 6 eye protection must be carrier must undertaken in accordance with Safe Working Method 7.3 worn)

Risk assessment at the A full risk assessment must be undertaken at the cut out in accordance 7 cut out with Safe Working Method 7.3

Confirm polarity at the Using an approved volt stick confirm the polarity on the incoming live

cut out with main fuse terminal of the cut out. 8 carrier removed Note: If volt stick fails, use approved neon testoscope.

Validate ELZ reading at the cut out and ensure that it falls within the Confirm earthing 9 contractual guidelines of permissible values. arrangement

Remove meter terminal cover’s and prove the meter dead using an Remove terminal cover approved test lamp; the lamp must be proved before and after the test 10 and prove the meter either using the proving unit supplied with the test lamp or on a known live DEAD supply.

Remove meter terminal cover and ensure that all terminals are tight

including the out-going side of the cut out and neutral block and other 11 Tightness Test associated equipment. Replace all terminal covers.

With the customer’s main switch in the off position, conduct a Glow Test in 12 Glow Test accordance with guidance in 4.15 of this COP.

Re-energise installation Fit appropriate size fuse in the fuse carrier for the cable size and ELZ (Insulated gloves and reading. Install the main fuse into the cut out ensuring that the fuse is 13 eye protection must be inserted in to the dead side first and then the live contact second worn)

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply.

Indication of polarity must be conducted at:

Incoming cut out fuses Polarity indication x 14 Cut out to meter live cables check x x Outgoing live tails to customers installation x All neutral cables must be tested for zero voltage

If the polarity is reversed at one of the above positions contact a Line Manager immediately.

Confirm the supply at the consumer unit (including off peak switches) with switch in the off position, using an approved test lamp. The lamp must

be proved before and after using the attached proving unit. Confirm supply at 15 customers main switch x Ensure that the main switch, breakers/fuses are off / removed before removing the consumer unit cover.

Confirm the polarity at the consumer unit (including off peak switches) with switch in the off position.

Confirm polarity at 16 customers main switch x Ensure that the main switch, breakers/fuses are off/removed before replacing the consumer unit cover.

Visually inspect the work carried out and confirm installations is safe, 17 Final visual checks cables marked, correctly wired and all switches in the off position

Fit disclaimer notice.

Fit PME notice where appropriate. Seal all equipment and 18 Sign and affix the witness label. attach labels

Leave a copy of the start readings at the meter position or with the Leave the new meter 19 customer if requested. Remove any waste material details

7.11 RECONNECTION OF MULTI PHASE METER

No Action Detail

General risk A general risk assessment must be carried out in accordance with Safe 1 assessment Working Method 7.1

Specific visual A specific visual inspection to evaluate the risks must be conducted in 2 inspection of the meter accordance with Safe Working Method 7.2 position

The polarity indication test must be conducted using an approved volt stick. The Volt Stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at. Incoming cut out fuse Polarity indication x 3 All neutral cables must be tested for zero voltage check x

If the polarity is reversed at any one of the above positions. Contact a Line Manager.

Conduct a visual inspection of the installation for its compliance with: Specific visual 4 ESQC Regs 2002 inspection of the installation BS 7671 PME Requirements

5 Main switches Ensure all the customers switches are in the off position

Remove the main fuse. (Insulated gloves and On removal of the main fuses a full assessment of the condition of the fuse 6 eye protection must be carriers must undertaken in accordance with Safe Working Method 7.3 worn)

Using an approved volt stick confirm the polarity on the incoming live Confirm polarity at the terminals of the cut out. 7 cut out with the main fuse carriers removed Note: If volt stick fails, use approved neon testoscope.

Prove the supply at the cut out using an approved test 8 Confirm three phase lamp; the lamp must be proved before and after the test supply at the cut out either using the proving unit supplied with the test lamp or on a known live supply.

Using an approved PSI, confirm the phase sequence of the incoming live 9 Confirm phase terminals of the cut out. The incoming live terminals then must be shrouded sequence at the cut out (where practicable)

Confirm earthing Validate ELZ reading at the cut out and ensure that it falls within the 10 arrangement contractual guidelines of permissible values

Remove meter terminal Remove Meter Terminal Covers and Prove Meter Dead using an approved 11 covers and prove meter test lamp; the lamp must be proved before and after the test either using the dead proving unit supplied with the test lamp or on a known live supply.

12 Ensure that all terminals are tight including the outgoing side of the cut out Ensure that all and neutral block and any other associated equipment terminals. i.e.

terminals are tight contactors.

Conduct a Glow Test on At the meter and with the customer’s main switch in the off position, conduct 13 Each Phase a Glow Test in accordance with guidance in 4.15 of this COP.

Conduct a One Fuse Conduct a one fuse test on each phase of the meter in accordance with the 14 Test on each phase guidance in 4.16 of this COP

Fit appropriate size fuse in the fuse carrier for the cable size and ELZ reading. Install the main fuse into the cut out ensuring that the fuse is inserted in to the dead side first and then the live contact second Re-energise installation and carry out polarity The polarity indication test must be conducted using an approved Volt Stick. indication test on meter The Volt Stick must be proved operational by testing on the live supply. tails Indication of polarity must be conducted at. 15 (Insulated gloves and Incoming cut out fuse eye protection must be x Cut out to meter live cables worn when x Inserting/Removing x Outgoing live tails to customer installation fuses) x All neutral cables must be tested for zero voltage If the polarity is reversed at any one of the above positions. Contact a Line Manager.

Identify the phase sequence at the meter and main switch terminals (including off peak switches) with switch in the off position using PSI. The phase sequence will be either: Identify phase

16 sequence at the meter and main switch Standard e.g. ABC – RYB – L1 L2 L3 terminals Non Standard e.g. BAC – YRB – L2 L1L3

Confirm Polarity and Supply at Customers Main Switch (including off peak switches) with switch in the off position.

Confirm polarity and • Where polarity cannot be confirmed using a volt stick with the consumer supply at customer’s unit cover in situ ensure that the main switch, breakers/fuses are 17 main switch (including off/removed and supply disconnected before removing the consumer unit off peak switches) with cover. switch in the off • Confirm supply using an approved test lamp; the lamp must be proved position. before and after the test either using the proving unit supplied with the test lamp or on a known live supply.

De-energise and prove De-energise and Prove Meter Dead using an approved test lamp; the lamp meter dead must be proved before and after the test either using the proving unit (Insulated gloves and supplied with the test lamp or on a known live supply. 18 eye protection must be worn when Inserting/Removing (Insulated gloves and eye protection must be worn when fuses) Inserting/Removing fuses)

Standard Phase Sequence Non Standard Sequence

Mark the incoming and outgoing tails in Ensure that in this situation that the pairs are pairs using the approved markers L1-L2-L3 and identified (incoming and outgoing). Mark the tails N. across the meter as L1-L3-L2 and N. NB: If The tails cannot be marked while still NB: If The tails cannot be marked while still connected to the meter, they must be connected to the meter, they must be marked marked individually as they are removed individually as they are removed from the terminal. from the terminal. Reconnect the tails as L1-L2-L3 and N in their respective pairs

Carry out visual Inspection Carry out visual Inspection

Ensure that all terminals are tight including Ensure that all terminals are tight including the the outgoing side of the cut out and neutral outgoing side of the cut out and neutral block, other block, other associated equipment terminals associated equipment terminals and customer main and customer main switch terminals. switch terminals.

Conduct a glow test on each phase of the Conduct a glow test on each phase of the meter in meter in accordance with guidance on 4.15 of accordance with guidance on 4.15 of this Code of this Code of Practice Practice

Replace all covers Replace all covers

Re-energise and seal all equipment. Ensure Re-energise and seal all equipment. Ensure customers main switch is left in the off position. customers main switch is left in the off position. (Insulated gloves and eye protection must be (Insulated gloves and eye protection must be worn worn when Inserting/Removing fuses) when Inserting/Removing fuses)

Attach labels: Disclaimer, PME where Attach labels: Disclaimer, PME where appropriate. appropriate. Sign and affix the witness label. Sign and affix the witness label.

Seal equipment and leave meter readings. Seal equipment and leave meter readings. Leave the existing meter details on the Leave the existing meter details on the appropriate appropriate card at the meter position. Seal all card at the meter position. Seal all equipment and equipment and remove any waste material. remove any waste material.

7.12 CHANGING A SINGLE PHASE METER TO AN IMPORT / EXPORT METER WHERE ACCESS IS GAINED No Action Detail

General risk A general risk assessment must be carried out in accordance with 1 assessment Safe Working Method 7.1.

Plug in test at socket socket must be tested, if this socket is also reversed AIRline and the Line 2 outlet Manager must be contacted immediately. If it is evident that only one socket is reversed the work can continue. The appropriate “DO NOT USE” sticker must be applied to the socket and a fault card left with the customer.

Specific visual

inspection of the meter A specific visual inspection to evaluate the risks must be conducted in 3 position accordance with Safe Working Method 7.2

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply.

Indication of polarity must be conducted at:

Incoming cut out fuse Polarity indication x 4 Cut out to meter live cable check x x Outgoing live tail to customers installation x All neutral cables must be tested for zero voltage

If the polarity is reversed at one of the above positions contact a Line Manager immediately.

The customer must be asked to power down their appliances before the main switch is turned off. (Please note that there may be a

number of Main Switches to turn off on these installations) Note the 5 Power down main switch positions as some switches may already be in the OFF position and must remain in the OFF position on re energisation.

Remove the main fuse (Insulated gloves and On removal of the main fuse a full assessment of the condition of the 6 eye protection must be fuse carrier must be undertaken in accordance with Safe Working worn) Method 7.3

Using an approved volt stick confirm the polarity on the incoming live Confirm polarity at the terminal of the cut out. 7 cut out with the main Note: If the volt stick fails, use approved neon testoscope. fuse carrier removed The incoming live terminal must then be shrouded (where practicable)

Remove meter terminal cover and prove the meter dead using an approved test lamp; the lamp must be proved before and after the test

either using the proving unit supplied with the test lamp or on a known live Remove terminal cover supply. 8 and prove the meter

DEAD Special consideration must be given to the possibility of back feeds via a generator, wind turbine, solar panels etc

x Incoming and outgoing tails to be marked with one marker, both live and neutral.

Apply permanent x Off peak circuits must be identified with 2 markers. 9 Tails should be marked before removing them from the meter. NB: If the polarity markers tails cannot be marked while still connected to the meter, they must be marked individually as they are removed from the terminal.

Ensure that the correct meter and tariff are being installed as per the job Change the instruction. When working at a multi service position installation with the 10 meter/associated tails removed from the meter, check for back feeds using a volt stick.5.24 equipment

Ensure that all terminals are tight including the out-going side of the cut

Tightness check out and neutral block. 11

After the installation of the new meter and with the customer’s main

switch in the off position, conduct a Glow Test in accordance with 12 Glow Test guidance in 4.15 of this COP.

Visually inspect the installation ensuring that cable colours, cable markers

and sequence of cables are all correct and that particular attention is made 13 Visual inspection to the specific diagram.

Replace terminal covers and re-energise

installation Replace the appropriate terminal covers and install the main fuse into the ( insulated gloves and cut out ensuring that the fuse is inserted into the dead side of the cut out 14 eye protection must be first and then the live contact second where applicable. worn

inserting/removing fuses)

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at: Incoming cut out fuse Polarity indication x Cut out to meter live cable 15 check for import export x Meter to meter live cable metering x x Meter to consumers main switch live All neutral cables must be tested for zero voltage If the polarity is reversed at one of the above positions contact a Line Manager immediately.

Visually inspect the work carried out and confirm that the installation is 16 Final visual checks safe, cables marked and wired correctly.

Inform the customer that the installation is to be re energised. Ensure that

Switch on customers all main switches are turned back as appropriate ON. Switches that where 17 main switch in the OFF position at the start of the job must remain in the OFF position.

Test the same socket on the customer’s installation that was tested in Plug in test at a socket stage 2 of this procedure. The installation must be left in the state of 18 outlet and affix witness correct polarity. Ask the customer to witness the plug in test. label

Seal equipment and Leave the old and new meter details on the appropriate card at the meter 19 leave meter readings position. Seal all equipment and remove any waste material.

7.13 CHANGING A MULTI PHASE METER TO IMPORT / EXPORT METER WHERE ACCESS IS GAINED No Action Detail

General risk A general risk assessment must be carried out in accordance with Safe 1 assessment Working Method 7.1.

Specific visual

inspection of the meter A specific visual inspection to evaluate the risks must be conducted in 3 position accordance with Safe Working Method 7.2

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply.

Indication of polarity must be conducted at:

Incoming cut out fuses Polarity indication x 4 Cut out to meter live cables check x x Outgoing live tails to customers installation x All neutral cables must be tested for zero voltage

If the polarity is reversed at one of the above positions contact a Line Manager immediately.

The customer must be asked to power down their equipment before the main switch is turned off. Note the main switch positions as some

switches may already be in the OFF position and must remain in the OFF 5 Power down position on re-energisation. Ask the customer or their representative if they have a generator that may start after the installation is de-energised.

Remove the main fuses (Insulated gloves and On removal of the main fuses a full assessment of the condition of the 6 eye protection must be fuse carrier’s must be undertaken in accordance with Safe Working worn) Method 7.3

Using an approved volt stick confirm the polarity on the incoming

live terminals of the cut out. Confirm polarity at the Note: If volt stick fails, use approved neon testoscope 7 cut out with the main

fuse carriers removed The incoming live terminals must then be shrouded (where practicable).

Remove terminal cover, re-energise and confirm the phase sequence at Remove terminal cover the terminals of the meter using an approved PSI. The phase sequence and Re-energise and will be either: confirm the phase

8 sequence (Insulated Standard ABC – RYB – L1 L2 L3 gloves and eye

protection must be Non Standard BAC – YRB – L2 L1 L3 worn)

Prove the meter dead using an approved test lamp; the lamp must De-energise and prove be proved before and after the test either using the proving unit

dead (Insulated gloves supplied with the test lamp or on a known live supply. 9 and eye protection Special consideration must be given to the possibility of back feeds

must be worn) via a generator, wind turbine, solar panels

Incoming live terminals must be shrouded (where practicable)

Standard Phase Sequence Non Standard Phase Sequence

Ensure that in this situation that the pairs are Mark the incoming and outgoing tails in identified (incoming and outgoing). Mark the tails pairs using the approved markers L1 L2 L3 N. across the meter as L1-L3-L2 and N. NB: If the tails cannot be marked while still connected to the meter, they must be NB: If The tails cannot be marked while still marked individually as they are removed connected to the meter, they must be marked from the terminal individually as they are removed from the terminal.

Change / install the Import Export meter Change / install the Import Export meter ensuring that the pairs stay the same sequence ensuring that the pairs stay the same sequence on both meters L1 L2 L3 N. on both meters L1 L2 L3 N.

Carry out a visual inspection Carry out a visual inspection

Ensure that all terminals are tight including Ensure that all terminals are tight including the the outgoing side of the cut out and neutral outgoing side of the cut out and neutral block and block and any other associated equipment any other associated equipment terminals terminals

Conduct a glow test on each phase of the Conduct a glow test on each phase of the meter meter in accordance with guidance on 4.15 of in accordance with guidance on 4.15 of this COP. this COP.

Conduct a one fuse test on each phase of the Conduct a one fuse test on each phase of the meter in accordance with guidance on 4.16 of meter in accordance with guidance on 4.16 of this this COP. (Insulated gloves and eye protection COP. (Insulated gloves and eye protection must must be worn when removing/inserting fuses) be worn when removing/inserting fuses)

Re-energise and confirm phase sequence at Re-energise and confirm phase sequence at meter terminals. (Insulated gloves and eye meter terminals and main switch. (Insulated protection must be worn when gloves and eye protection must be worn when removing/inserting fuses) removing/inserting fuses)

De-energise and replace meter terminal De-energise and replace meter terminal cover. cover. (Insulated gloves and eye protection (Insulated gloves and eye protection must be must be worn when removing/inserting fuses) worn when removing/inserting fuses)

Final visual checks. Visually inspect the work Final visual checks. Visually inspect the work carried out and confirm that the installation is carried out and confirm that the installation is safe, safe, cables marked and wired correctly. cables marked and wired correctly.

Re-energise(Insulated gloves and eye Re-energise(Insulated gloves and eye protection protection must be worn when must be worn when removing/inserting fuses) removing/inserting fuses)

Plug in test at a socket outlet and affix Plug in test at a socket outlet and affix witness witness label. label. Test the same socket on the customer’s Test the same socket on the customer’s installation that was tested in stage 2 of this installation that was tested in stage 2 of this procedure. The installation must be left in the procedure. The installation must be left in the state of correct polarity. Ask the customer to state of correct polarity. Ask the customer to witness the plug in test. Sign and affix the witness the plug in test. Sign and affix the witness label. witness label.

Ensure with customer that multi phase Ensure with customer that multi phase equipment equipment operates correctly operates correctly

Seal equipment and leave meter readings. Seal equipment and leave meter readings. Leave the old and new meter details on the Leave the old and new meter details on the appropriate card at the meter position. Seal all appropriate card at the meter position. Seal all equipment and remove any waste material. equipment and remove any waste material.

7.14 INSTALLATION OF SINGLE PHASE WHOLE CURRENT SUB METER

No Action Detail

Report to site Report to appropriate person/department on site and receive any agent/representative 1 induction necessary and or receipt of any safety documentation i.e. receive Permit to Work Permit to Work. This is a legal Health & Safety requirement and must be if necessary adhered to at all times.

General risk 2 A general risk assessment must be carried out in accordance with Safe assessment Working Method 7.1

socket must be tested, if this socket is also reversed AIRline and the Line 3 Plug in test at socket Manager must be contacted immediately. If it is evident that only one outlet socket is reversed the work can continue. The appropriate “DO NOT USE” sticker must be applied to the socket and a fault card left with the customer.

Specific visual

inspection of the 4 A specific visual inspection to evaluate the risks must be conducted in metering and accordance with Safe Working Method 7.2 customers equipment

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply. 5 Polarity indication Indication of polarity must be conducted at: check x Customers Switch Fuse x All neutral cables must be tested for zero voltage If the polarity is reversed contact a Line Manager immediately.

The customer must be asked to power down their equipment before the

main switch is turned off. Note the main switch positions as some 6 Power down at switches may already be in the OFF position and must remain in the OFF customers switch fuse position on re-energisation.

The sub main cable feeding the customer’s switch fuse must be isolated and locked off. Any fuses removed must remain in the custardy of the

operative through out the job. An appropriate safety notice must be Isolation at local displayed at the main isolator, warning of the work being carried out. 7 distribution point of

customer’s sub- main On removal of the fuses a full assessment of the condition of the fuses cable and fuse carrier must be undertaken in accordance with Safe Working Method 7.3

Remove fuses from customer’s switch fuse On removal of the fuses a full assessment of the condition of the fuses 8 (Insulated gloves and and fuse carrier must be undertaken in accordance with Safe Working eye protection must be Method 7.3 worn)

The incoming and outgoing sides of the customer’s switch fuse must be

9 proven dead using an approved test lamp. Particular notice must be Proving dead given to the presence of back feeds.

Fit meter board, red Meter Board, Red Link and neutral Block to be fitted as per 5.20 of this 10 link and neutral block Code of Practice

Re-terminate customer’s sub-main cable into an insulated enclosure Re-termination of 11 ensuring continuity of earthing arrangements. As per 5.20 of this COP Customer’s sub-main Ensure all cables are identified using approved identification labels cable

12 Install meter Meter to be installed as per 5.20 of this Code of Practice

Where the steel wire armours of the sub main or a core of the steel wire armoured cable forms the installation earth, an earth cable must be 13 Customers earthing suitably installed between the insulated enclosure and the customer’s switch fuse to maintain earth continuity of the customer’s installation

Visually inspect the installation ensuring that cable colours, cable 14 Visual inspection markers and sequence of cables are all correct

Ensure all terminal connections are tight including: Red links and neutral block connections 15 x Tightness check x Meter terminals x Customers switch fuse

Re-energise 16 Ensure red links are removed and insulated enclosure lid is fitted. customer’s sub- main Re-energise customer’s sub main

Conduct a Polarity Test in accordance with this code of practice at the 17 Polarity test at red link red link using an approved volt stick

After the installation of the new meter and with the customers main

18 switch in the off position, conduct a Glow Test in accordance with Glow test guidance in 4.15 of this Code of Practice

Replace terminal covers and re-energise installation (insulated 19 gloves and eye Replace the meter terminal cover and install the red link into the cut out. protection must be worn when installing /removing fuses)

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at: Incoming cut out fuse x Polarity indication Cut out to meter live cable 20 x check x Meter to consumers main switch live x Customers consumer unit x All neutral cables must be tested for zero voltage If the polarity is reversed at one of the above positions contact a Line Manager immediately.

Visually inspect the work carried out and confirm that the installation is 21 Final visual checks safe, cables marked and wired correctly.

Inform the customer that the installation is to be re-energised. Ensure

Switch on customers that all main switches are turned back ON. Switches that where in the 22 main switch OFF position at the start of the job must remain in the OFF position.

Test the same socket on the customer’s installation that was tested in Plug in test at a socket stage 3 of this procedure. The installation must be left in the state of 23 outlet and affix witness correct polarity. Ask the customer to witness the plug in test. label

Seal equipment and Leave the old and new meter details on the appropriate card at the 24 leave meter readings meter position. Seal all equipment and remove any waste material.

7.15 INSTALLATION OF MULTI PHASE WHOLE CURRENT SUB METER

No Action Detail

A general risk assessment must be carried out in accordance with Safe 2 General risk Working Method 7.1 assessment

On access to the installation the polarity must be tested at one of the socket outlets using an approved plug in polarity testing device with an audible tone. If at this stage the polarity is incorrect then another 3 Plug in test at socket socket must be tested, if this socket is also reversed AIRline and the Line outlet Manager must be contacted immediately. If it is evident that only one socket is reversed the work can continue. The appropriate “DO NOT USE” sticker must be applied to the socket and a fault card left with the customer.

Specific visual 4 inspection of the A specific visual inspection to evaluate the risks must be conducted in customers equipment accordance with Safe Working Method 7.2

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply.

Indication of polarity must be conducted at: 5 Polarity indication Customer’s switch fuse check x x All neutral cables must be tested for zero voltage If the polarity is reversed at one of the above positions contact a Line Manager immediately.

The customer must be asked to power down their equipment before the

Remove fuses from customer’s switch fuse On removal of the fuses a full assessment of the condition of the fuses 7 (Insulated gloves and and fuse carrier must be undertaken in accordance with Safe Working eye protection must be Method 7.3 worn)

A phase rotation test must be carried out at the customer’s switch fuse to

8 establish correct rotation. The customer’s incoming tails must be Phase rotation correctly identified at this stage.

Using an approved volt stick confirm the polarity on the incoming live 9 Confirm polarity at terminals of the switch fuse. The volt stick must be proved operational by customer’s switch fuse testing on the live supply.

The sub main cable feeding the customer’s switch fuse must be isolated and locked off. Any fuses removed must remain in the custardy of the Isolation at local operative throughout the job. An appropriate safety notice must be distribution point of displayed at the main isolator, warning of the work being carried out 10 customer’s sub- main cable On removal of the fuses a full assessment of the condition of the fuses and fuse carrier must be undertaken in accordance with Safe Working Method 7.3

The incoming and outgoing sides of the customer’s switch fuse must be proven dead using an approved test lamp. The lamp must be proved

11 before and after the test either using the proving unit supplied with the Proving dead test lamp or on a known live supply. Particular notice must be given to the presence of back feeds.

Fit meter board, red 12 Meter Board, Red Links and neutral Block to be fitted as per 5.20 of this links and neutral block Code of Practice

Re-termination of Re-terminate customer’s sub-main cable into an insulated enclosure 13 customer’s sub-main ensuring continuity of earthing arrangements. As per 5.20 of this COP cable Ensure all cables are identified using approved identification labels

14 Install meter Meter to be installed as per 5.20 of this Code of Practice

Where the steel wire armours of the sub main or a core of the steel wire armoured cable forms the installation earth, an earth cable must be 15 Customers earthing suitably installed between the suitable enclosure and the customer’s switch fuse to maintain earth continuity of the customer’s installation

Carry out insulation 16 Carry out insulation resistance tests between phases and earth, neutral resistance testing and earth in accordance with BS7671 and document findings.

Carry out a visual Visually inspect the meter installation ensuring that cable colours, polarity 17 inspection markers and sequence of cables are all correct

Ensure all terminal connections are tight including:

Red links and neutral block connections 18 Ensure all terminals x are tight x Meter terminals Customers switch fuse

Ensure red links are removed and insulated enclosure lid is fitted. 19 Re-energise Re-energise customer’s sub main customer’s sub main

Polarity test at red 20 Conduct a Polarity Test in accordance with this code of practice at the links red link using an approved volt stick.

After the installation of the new meter and with the customers main

21 switch in the off position, conduct a Glow Test in accordance with Glow test guidance in 4.15 of this Code of Practice

Conduct a one fuse test on each phase of the meter in accordance with 22 One fuse test guidance on 4.16 of this COP. (Insulated gloves and eye protection must be worn when removing/inserting fuses)

Confirm the phase sequence at the terminals of the meter and customers Re energise and switch fuse using an approved PSI. The phase sequence MUST be : confirm phase 23 sequence at the meter Standard e.g. ABC – RYB – L1 L2 L3 - and customers switch Customers phase rotation must remain as found. fuse

De-energise and

24 replace covers and De-energise and replace the red links and seal the meter and red links. energise meter

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at: 25 Polarity indication x Incoming red link fuse check x Red link to meter live cable x Meter to customers main switch live x Customers Main Switch All neutral cables must be tested for zero voltage

Re-insert fuses in 26 customers switch fuse Ensure customers switch fuse is in the “OFF” position and replace fuses.

Visually inspect the work carried out and confirm that the installation is 27 Final visual checks safe, cables marked and wired correctly.

Inform the customer that the installation is to be re energised. Ensure that 28 Switch on customers all main switches are turned back ON. Switches that where in the OFF main switch position at the start of the job must remain in the OFF position.

29 Test the same socket on the customer’s installation that was tested in Plug in test at socket stage 3 of this procedure. The installation must be left in the state of outlet and affix witness correct polarity. Ask the customer to witness the plug in test. label

Operation of 30 customers equipment Ensure with customer that multi phase equipment operates correctly

Leave new meter details on appropriate card at the meter position. Seal 31 Seal equipment and all equipment and remove any waste materials. leave meter readings

Report to appropriate person/department, cancel any Permit to Work that 32 Report egress from site has been issued and inform of departure from site.

7.16 INSTALLATION OF CHECK METERS

No Action Detail

A general risk assessment must be carried out in accordance with Safe 1 General risk assessment Working Method 7.1.

socket must be tested, if this socket is also reversed AIRline and the Plug in test at socket Line Manager must be contacted immediately. If it is evident that only 2 outlet one socket is reversed the work can continue. The appropriate “DO NOT USE” sticker must be applied to the socket and a fault card left with the customer.

Specific visual A specific visual inspection to evaluate the risks must be conducted in inspection of the meter accordance with Safe Working Method 7.2. 3 position

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at: Incoming cut out fuse 4 x Polarity indication check x Cut out to meter live cable x Outgoing live tail to customers installation x All neutral cables must be tested for zero voltage If the polarity is reversed at one of the above positions contact a Line Manager immediately.

The customer must be asked to power down their appliances before the main switch is turned off. Note the main switch positions as some 5 Power down switches may already be in the OFF position and must remain in the OFF position on re energisation.

Single Phase Multi Phase

Remove the main fuse Remove the main fuses (Insulated gloves and eye protection must be (Insulated gloves and eye protection must be worn) worn) On removal of the main fuses a full risk assessment of On removal of the main fuse a full risk the condition of the fuse carriers must be undertaken in assessment of the condition of the fuse carrier accordance with Safe Working Method 7.3 must be undertaken in accordance with Safe Working Method 7.3

Confirm polarity at the cut out with main fuse Confirm polarity at the cut out with main fuse carrier removed carriers removed

Using an approved volt stick confirm the polarity Using an approved volt stick confirm the polarity on on the incoming live terminal of the cut out. the incoming live terminals of the cut out. Note: If volt stick fails, use approved neon Note: If volt stick fails, use approved neon testoscope. testoscope. The incoming live terminals must then be shrouded The incoming live terminal must then be (where practicable). shrouded (where practicable).

Where possible do not remove the existing meter terminal cover. If the existing tails between the cut out and meter are too short to reach the check meter position, the existing terminal cover must be removed and the meter proved Dead before changing the tails.

Confirm the phase sequence at the cut out

Confirm the phase sequence of cut out using an

approved PSI. The phase sequence will be either:

Standard e.g. ABC – RYB – L1 L2 L3 Non Standard e.g. BAC – YRB – L2 L1 L3

Prove the supply tails DEAD at the outgoing Prove the supply tails DEAD at the outgoing side of side of the cut out the cut out Prove the outgoing side of the cut out dead using an Prove the outgoing side of the cut out dead using approved test lamp; the lamp must be proved before an approved test lamp; the lamp must be and after the test either using the proving unit supplied proved before and after the test either using the with the test lamp or on a known live supply. proving unit supplied with the test lamp or on a known live supply.

Apply permanent polarity markers Apply permanent polarity markers

Meter tails from the cut out MUST be marked with Meter tails from the cut out MUST be marked with the the appropriate marker, L & N appropriate marker, L1, L2, L3 & N if multiphase.

Tails should be marked before removing them Tails should be marked before removing them from the from the cut out. NB: If the tails cannot be cut out. NB: If the tails cannot be marked while still marked while still connected to the cut out, connected to the cut out, they must be marked they must be marked individually as they are individually as they are removed from the terminals. removed from the terminals.

Install new single rate check meter Install new single rate multi phase check meter

5,18 Single phase 5.19 Multiphase

Install the check meter ensuring all terminations Install the check meter ensuring all terminations are are tight tight and phase rotation is standard.

If there is any doubt as to the tightness of the tails If there is any doubt as to the tightness of the in the existing meter the terminal cover should be tails in the existing meter the terminal cover removed and all terminals tightened accordingly. should be removed and all terminals tightened accordingly.

Glow test Glow test Conduct a glow test on the meter in accordance Conduct a glow test of each phase of the meter in with guidance 4.15 of this Code of Practice accordance with guidance 4.15 of this Code of Practice

Caution – The test lamp will glow slightly brighter Caution – The test lamp will glow slightly brighter due to due to two meters being in series. two meters being in series.

One fuse test Insulated gloves and eye protection must be worn

Conduct a one fuse test on each phase of the meter in accordance with guidance in 4.16 of this COP

Re-energise and confirm the phase sequence (Insulated gloves and eye protection must be worn)

Confirm the phase sequence of the check meter using an approved PSI.

De-energise installation (Insulated gloves and eye protection must be worn) Remove fuses and replace the appropriate terminal covers, where removed.

Visual inspection Visual inspection

Visually inspect the installation ensuring that Visually inspect the installation ensuring that cable cable colours, cable markers and sequence of colours, cable markers and sequence of cables are all cables are all correct. correct.

Re-energise installation (Insulated gloves and Re-energise installation (Insulated gloves and eye eye protection must be worn) protection must be worn)

Replace all terminal covers and install the main Insert the main fuse/s into the cut out ensuring that the fuse into the cut out ensuring that the fuse is fuse is inserted into the dead side of the cut out first and inserted into the dead side of the cut out first and then the live contact second where applicable. then the live contact second where applicable.

Polarity indication check Polarity indication check

The polarity indication test must be conducted The polarity indication test must be conducted using an using an approved volt stick. The volt stick must approved volt stick. The volt stick must be proved be proved operational by testing on the live operational by testing on the live supply. supply. Indication of polarity must be conducted at: Indication of polarity must be conducted at: x Incoming cut out fuses x Incoming cut out fuse x Cut out to check meter to existing meter live cable x Cut out to check meter live cable x Meter to consumers main switch live x Check meter to existing meter live cable x All neutral cables must be tested for zero voltage x Meter to consumers main switch live cable If the polarity is reversed at one of the above positions x All neutral cables must be tested for zero contact a Line Manager immediately. voltage If the polarity is reversed at one of the above positions contact a Line Manager immediately.

Final visual checks Final visual checks

Visually inspect the work carried out and confirm that Visually inspect the work carried out and confirm the installation is safe, cables marked and wired that the installation is safe, cables marked and correctly. wired correctly.

Switch on customers main switch Switch on customers main switch

Inform the customer that the installation is to be Inform the customer that the installation is to be re re energised. Ensure that all main switches are energised. Ensure that all main switches are turned turned back ON. Switches that where in the OFF back ON. Switches that where in the OFF position at position at the start of the job must remain in the the start of the job must remain in the OFF position. OFF position.

Plug in test at a socket outlet and affix Plug in test at a socket outlet and affix witness label witness label

Test the same socket on the customer’s Test the same socket on the customer’s installation that installation that was tested in stage 2 of this was tested in stage 2 of this procedure. The installation procedure. The installation must be left in the must be left in the state of correct polarity. Ask the state of correct polarity. Ask the customer to customer to witness the plug in test. witness the plug in test.

Ensure with customer that multi phase equipment operates correctly

Seal equipment and leave meter readings Seal equipment and leave meter readings

Leave the existing meter and check meter details Leave the existing meter and check meter details on the on the appropriate form at the meter position. appropriate form at the meter position. Seal all Seal all equipment and remove any waste equipment and remove any waste material. material.

7.17 REMOVAL OF CHECK METERS

No Action Detail

A general risk assessment must be carried out in accordance with Safe 1 General risk assessment Working Method 7.1.

On access to the installation the polarity must be tested at one of the socket outlets using an approved plug in polarity testing device with an audible tone. If at this stage the polarity is incorrect then another 2 Plug in test at socket socket must be tested, if this socket is also reversed AIRline and the outlet Line Manager must be contacted immediately. If it is evident that only one socket is reversed the work can continue. The appropriate “DO NOT USE” sticker must be applied to the socket and a fault card left with the customer.

Specific visual A specific visual inspection to evaluate the risks must be conducted in 3 inspection of the meter accordance with Safe Working Method 7.2. position

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at: Incoming cut out fuse x 4 Cut out to check meter live cable/s check meter to existing meter Polarity indication check x live cable/s x Outgoing live tail to customers installation x All neutral cables must be tested for zero voltage If the polarity is reversed at one of the above positions contact a Line Manager immediately.

The customer must be asked to power down their appliances before the main switch is turned off. Note the main switch positions as some

5 switches may already be in the OFF position and must remain in the Power down OFF position on re energisation.

Single Phase Multi Phase

Remove the main fuse Remove the main fuses (Insulated gloves and eye protection must be (Insulated gloves and eye protection must be worn) worn)

Before the main fuse is removed a full assessment Before the main fuses are removed a full assessment of the condition of the fuse carrier must be of the condition of the fuse carrier must be undertaken undertaken in accordance with Safe Working in accordance with Safe Working Method 7.3. Method 7.3.

Confirm polarity at the cut out with main fuse Confirm polarity at the cut out with main fuse carrier removed carriers removed

Using an approved volt stick confirm the polarity Using an approved volt stick confirm the polarity on on the incoming live terminal of the cut out. the incoming live terminal of the cut out. Note: If volt stick fails, use approved neon Note: If volt stick fails, use approved neon testoscope. testoscope.

The incoming live terminal must then be shrouded The incoming live terminal must then be shrouded (where practicable). (where practicable).

Re-energise and confirm the phase sequence (Insulated gloves and eye protection must be worn)

Confirm and record the phase sequence of x existing meter using an approved PSI. The phase sequence will be either:

x Standard e.g. ABC – RYB – L1 L2 L3 x Non Standard e.g. BAC – YRB – L2 L1 L3

x Where this is found to be non-standard on the existing meter the wiring should be corrected to provide standard rotation at the meter terminals without affecting the customers phase rotation.

Remove terminal covers and prove meters dead De-energise and prove DEAD (Insulated gloves and eye protection must be (Insulated gloves and eye protection must be worn) worn)

Remove all terminal covers and prove dead using Remove fuse/s and all terminal covers and prove an approved test lamp; the lamp must be proved dead using an approved test lamp; the lamp must be before and after the test either using the proving proved before and after the test either using the unit supplied with the test lamp or on a known live proving unit supplied with the test lamp or on a known supply. live supply.

Remove the check meter Remove the check meter

Remove check meter and reconnect existing meter Remove check meter and reconnect existing meter to to the cut out the cut out

Tightness check Tightness check

Ensure all terminals are tight including out going side Ensure all terminals are tight including out going of cut out and any auxiliary equipment existing or side of cut out and any auxiliary equipment existing replaced meter or replaced meter

Visual inspection Visual inspection

Visually inspect the installation ensuring that cable Visually inspect the installation ensuring that cable colours, cable markers and sequence of cables are colours, cable markers and sequence of cables are all all correct correct.

. Glow test Glow test

With the existing meter connected, or a With the existing meter connected, or a replacement if replacement if found to be faulty, and the found to be faulty, and the customer’s main switch in customer’s main switch in the off position, conduct the off position, conduct a Glow Test in accordance a Glow Test in accordance with guidance in 4.15 of with guidance in 4.15 of this COP. On all phases this COP. On all phases where applicable where applicable

One fuse test (Multiphase only) (Insulated gloves and eye protection must be worn) Conduct a one fuse test on each phase of the meter in accordance with guidance in 4.16 of this COP

Re-energise installation (Insulated gloves and Re-energise and confirm the phase sequence eye protection must be worn) (Multiphase only) (Insulated gloves and eye protection must be Replace the appropriate terminal covers and install worn) the main fuse into the cut out ensuring that the fuse is inserted into the dead side of the cut out first and x Confirm the phase sequence of the existing then the live contact second where applicable. or replaced meter using an approved PSI. x Phase rotation MUST be checked at the customer’s main switch to ensure rotation is as found on arrival at site. If this is not the case then rotation has not been corrected at the meter correctly. Further investigation will need to be done.

De-energise installation (Insulated gloves and eye protection must be worn) Remove fuses and replace the terminal cover.

Re-energise installation (Insulated gloves and eye protection must be worn) Insert the main fuse/s into the cut out ensuring that the fuse is inserted into the dead side of the cut out first and then the live contact second where applicable.

Polarity indication check Polarity indication check

The polarity indication test must be conducted using The polarity indication test must be conducted using an approved volt stick. The volt stick must be an approved volt stick. The volt stick must be proved operational by testing on the live supply. proved operational by testing on the live supply. Indication of polarity must be conducted at: Indication of polarity must be conducted at: x Incoming cut out fuse/s x Incoming cut out fuse/s x Cut out to meter live cable x Cut out to meter live cable x Meter to consumers main switch live x Meter to consumers main switch live x All neutral cables must be tested for zero x All neutral cables must be tested for zero voltage voltage If the polarity is reversed at one of the above positions If the polarity is reversed at one of the above contact a Line Manager immediately. positions contact a Line Manager immediately.

Final visual checks Final visual checks

Visually inspect the work carried out and confirm Visually inspect the work carried out and confirm that that the installation is safe, cables marked and the installation is safe, cables marked and wired wired correctly. correctly.

Switch on customers main switch Switch on customers main switch

Inform the customer that the installation is to be re Inform the customer that the installation is to be re energised. Ensure that all main switches are turned energised. Ensure that all main switches are turned back ON. Switches that where in the OFF position back ON. Switches that where in the OFF position at at the start of the job must remain in the OFF the start of the job must remain in the OFF position. position.

Check customers equipment (multiphase only) Ask customer to check any multi phase machinery on site is working correctly

Plug in test at a socket outlet and affix witness Plug in test at a socket outlet and affix witness label label

Test the same socket on the customer’s installation Test the same socket on the customer’s installation that was tested in stage 2 of this procedure. The that was tested in stage 2 of this procedure. The installation must be left in the state of correct installation must be left in the state of correct polarity. polarity. Ask the customer to witness the plug in Ask the customer to witness the plug in test. test.

Seal equipment and meter readings Seal equipment and meter readings

Leave the existing meter and check meter details Leave the existing meter and check meter details on on the appropriate card at the meter position. the appropriate card at the meter position. Seal all equipment and remove any waste material. Seal all equipment and remove any waste material.

7.18 DE-ENERISATION AND REMOVAL OF METERING EQUIPMENT

1 General risk A general risk assessment must be carried out in accordance with Safe assessment Working Method 7.1.

2 Plug in test at socket outlet On access to the installation the polarity must be tested at one of the socket (If property is outlets using an approved plug in polarity testing device with an audible energised) tone. If at this stage the polarity is incorrect then another socket must be tested, if this socket is also reversed AIRline and the Line Manager must be contacted immediately. If it is evident that only one socket is reversed the work can continue. The appropriate “DO NOT USE” sticker must be applied to the socket and a fault card left with the customer.

3 Specific visual A specific visual inspection to evaluate the risks must be conducted in inspection of the accordance with Safe Working Method 7.2 meter position

4 Polarity indication The polarity indication test must be conducted using an approved volt stick. check The volt stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at: x Incoming cut out fuse x Cut out to meter live cable x Outgoing live tail to customers installation x All neutral cables must be tested for zero voltage If the polarity is reversed at one of the above positions contact a Line Manager immediately.

Part Removal Full Removal

Identification of cables where part removal of Power down equipment is required The customer must be asked to power down their Where neutral cables are to be removed from a equipment before the main switch is turned off. redundant part of the installation e.g. Off Peak Note the main switch positions as some switches equipment no longer required, great care must be may already be in the OFF position and must taken to trace the redundant neutral cables back to remain in the OFF position on re-energisation. their source.

If this cannot be confirmed visually, it must be verified electrically by using an approved test lamp.

Power down Remove the main fuse/s (insulated gloves and The customer must be asked to power down their eye protection must be worn) equipment before the main switch is turned off. Note the main switch positions as some switches may On removal of the main fuse a full assessment of already be in the OFF position and must remain in the the condition of the fuse carrier must be undertaken OFF position on re-energisation. in accordance with Safe Working Method 7.3.

Remove the main fuse/s (insulated gloves and eye Confirm polarity at the cut out with main fuses protection must be worn) removed

On removal of the main fuse a full assessment of the Using an approved volt stick confirm the polarity condition of the fuse carrier must be undertaken in on the incoming live terminal of the cut out. accordance with Safe Working Method 7.3. Note: If volt stick fails, use approved neon testoscope. The incoming live terminal must then be shrouded (where practicable).

Confirm polarity at the cut out with main fuses Remove terminal covers and prove meter dead removed Remove meter terminal cover’s and prove the meter Using an approved volt stick confirm the polarity on dead using an approved test lamp; the lamp must the incoming live terminal of the cut out. be proved before and after the test either using the Note: If volt stick fails, use approved neon proving unit supplied with the test lamp or on a testoscope. known live supply. The incoming live terminal must then be shrouded (where practicable).

Remove terminal covers and prove meter dead Remove all metering equipment and cables

Remove meter terminal cover’s and prove the meter dead using an approved test lamp; the lamp must be proved before and after the test either using the proving unit supplied with the test lamp or on a known live supply.

Redundant meter tails and associated equipment Blank off all holes and remove fuse/s from carrier/s All redundant meter tails and associated equipment shall be removed. All redundant meter tails and associated equipment shall be removed. Plastic bungs will be fitted into any live and neutral spare terminal holes. Plastic bungs will be fitted into any live and neutral spare terminal holes. Fuses must be removed from fuse carriers on all idle services where practicable. Cut outs must be sealed top and bottom.

Tightness check Visual inspections

Ensure that all terminals are tight including the out- Visually inspect the installation ensuring that cable going side of the cut out and neutral block and other colours, cable markers and sequence of cables are associated equipment terminals all correct.

Refit fuse carrier/s and seal cut out Glow test

After the removal of equipment and with the customer’s main switch in the off position, conduct a Glow Test in accordance with guidance in 4.15 of this COP.

Fit appropriate labels and warning tape Visual inspections Leave the old meter details on the appropriate card at the meter position. Seal all equipment and Visually inspect the installation ensuring that cable remove any waste material. Apply warning tape as colours, cable markers and sequence of cables are all appropriate. correct.

Informing AIRline or Distribution Network Replace terminal covers and re-energise Operator

Replace the terminal covers and install the main fuse Where the redundant service and cut out require into the cut out ensuring that the fuse is inserted into urgent removal or are deemed unsafe, AIRline/DNO the dead side of the cut out first and then the live must be informed immediately. contact second where applicable.

Polarity indication check

The polarity indication test must be conducted using an approved volt stick. The volt stick must be proved operational by testing on the live supply. Indication of polarity must be conducted at: x Incoming cut out fuse x Cut out to meter live cable x Meter to consumers main switch live x All neutral cables must be tested for zero voltage If the polarity is reversed at one of the above positions contact a Line Manager immediately.

Final visual checks

Visually inspect the work carried out and confirm that the installation is safe, cables marked and wired correctly.

Switch on customers main switch

Inform the customer that the installation is to be re- energised. Ensure that all main switches are turned back ON. Switches that where in the OFF position at the start of the job must remain in the OFF position.

Plug in test

Test the same socket on the customer’s installation that was tested in stage 2 of this procedure. The installation must be left in the state of correct polarity. Ask the customer to witness the plug in test..

Labelling

Leave the old and new meter details on the appropriate card at the meter position. Seal all equipment and remove any waste material.

7.19 GAS ESCAPE PROCEDURE (DOMESTIC) No Action Detail

1 Turn off gas supply Turn off gas supply at the Emergency Control Valve.

To extinguish all sources of ignition and naked flames. 2 No to operate any electrical switches or appliances. Instruct the occupier Ventilate the immediate area by opening doors/windows.

3 Use of mobile phone Do not use your mobile phone, MDT or HHU in the affected area.

Only evacuate the property where: 4 Evacuation from Occupant safety is at risk. property Persons are overcome by gas or products of combustion.

Contact NATIONAL GRID on 0800 111 999 and give the following details: Controlled or uncontrolled gas escape. Name, address and postcode of customer. Your name and contact number. 5 When the smell was first noticed and location. Contact National Grid Is the Emergency Control Valve off? Any other properties affected. Is there a smell of gas outside the property? Give any extra information that may be relevant. Ask for a Reference Number for your records.

Write the Reference Number on the ‘Notification of Gas Escape’ card. 6 Record reference Attach the card to the Emergency Control Valve. number on card

Inform the occupier or responsible person, that the gas supply can only

7 be restored by a NATIONAL GRID Engineer and that they will require Inform the occupier immediate access even if the meter is outside the property.

8 Notify AIRline Inform AIRline on 0800 092 1361

Section 8

Safe Working Methods CT Operated Metering

8.1 Installation and replacement of GSM modems

8.2 LV CT Operated Meter Install or Change to Panel Only

8.3 Installation of LV CT Chamber / Cabinet and CT’s

8.4 Installation of LV metering terminal (T) box

8.5 Installation of HV metering terminal (T) box

8.6 HV CT Operated Meter Install or Change to Panel Only

8.7 COP 4 Testing of HV AND LV Meters

8.8 Installation of Half Hourly Sub-Meter

8.1 INSTALLATION OR REPLACEMENT OF GSM MODEMS No Action Detail

Report to Site Agent/ Report to appropriate person/department on site and receive any Representative induction necessary and or receipt of any safety documentation. This is 1 a legal Health & Safety requirement and must be adhered to at all times.

Carry out risk Carry out visual Risk Assessment of Access/Egress to meter position. 2 assessment Carry out visual Risk Assessment of metering equipment and Environment.

3 Check signal Test for adequate GSM signal strength.

4 Install aerial Install aerial in a suitable location and to maximise the signal strength.

5 Install aerial cable Neatly install and fix aerial cable to modem location.

Connect modem If GSM Modem requires separate power supply, isolate Metering 6 Fuses, Install and connect Modem Power supply including discriminatory fusing, Re-energise Meter and Modem Power Supply

Check modem Once suitable signal strength obtained test dial from MDT or if in doubt 7 call dial up team for download of Meter Data to confirm operation of GSM Modem.

Take manual meter readings and reseal metering against illegal 8 Record readings interference.

Remove any rubbish/waste materials that Siemens are responsible for 9 Good housekeeping in accordance with OS environmental procedures.

Report egress from site Report to appropriate person/department and inform of departure from 10 site.

8.2 LV CT OPERATED METER INSTALL OR CHANGE TO PANEL ONLY No Action Detail

Report to Site Agent/ Report to appropriate person/department on site and receive any 1 Representative induction necessary and or receipt of any safety documentation. This is a legal Health & Safety requirement and must be adhered to at all times.

Carry out risk Carry out visual Risk Assessment of Access/Egress to meter position. 2 assessment Carry out visual Risk Assessment of metering equipment and Environment.

Capture meter data on HH - Obtain remote download of any existing meters stored data by 3 change only Data Collector. NHH – Take and record all meter readings

Check operation of Ensure that existing meter and associated equipment is functioning 4 existing metering correctly.

Confirm and record Confirm and record CT Details, ensure CT Burdens are not exceeded. 5 site CT details

Isolate metering Isolate metering system by removing metering fuses and shorting CT 6 equipment where Links. meter to be changed

Proving dead at meter Prove Voltage Terminals to be dead using approved test lamp. The test terminal block operation of the test lamp must be proved before and after test. 7 Confirm visually that CT’s are shorted out.

Install/change Remove old meter and communications equipment where necessary 8 metering equipment and install new meter and communications equipment.

Carry out visual Ensure that all cables are identified in accordance with the MOCOPA 9 wiring checks. agreement and are in good condition.

Re-energise metering Replace Metering fuses to re-energise metering, checking phase failure 10 equipment indication is working.

Check correct Remove shorting links from CT’s individually confirming correct 11 operation of meter operation of meter.

Commission new Commission metering system as per this Code of Practice to prove 12 metering equipment correct operation and communications.

Protection against Blank off any redundant holes and slots to protect against direct contact 13 direct contact with exposed live parts.

8.3 INSTALLATION OF LV CT CHAMBER/CABINET AND CT’s No Action Detail

Report to Site Agent/ Report to appropriate person/department on site and receive any Representative induction necessary and or receipt of any safety documentation. 1 This is a legal Health & Safety requirement and must be adhered to at all times.

General risk Carry out visual Risk Assessment of Access/Egress to meter 2 assessment position. In accordance with Safe Working Method 7.1

Specific risk Carry out visual Risk Assessment of metering equipment and assessment surrounding environment. In accordance with Safe Working Method 3 7.2 Check customer’s main tails for size and suitability.

Remove the Main On removal of the main fuses a full assessment of the condition of Fuse carriers. the fuse carrier’s must be undertaken in accordance with Safe 4 (Insulated gloves and Working Method 7.3. eye protection must If shrouds are on the prongs of the cut out ensure they are be worn) correctly installed.

Confirm Polarity at Using an approved volt stick confirm the polarity on the incoming the Cut Out with main live terminals of the cut out. 5 fuse carrier removed Note: If volt stick fails, use approved neon testoscope.

Confirm Supply at the Prove the supply at the cut out using an approved test lamp; must Cut Out. (phase to be proved before and after the test either using the proving unit 6 phase and phase to supplied with the test lamp or on a known live supply. neutral)

Confirm Phase Using an approved Phase Sequence Indicator (PSI), confirm the 7 Sequence at the Cut phase sequence of the incoming live terminals of the cut out. Out

Earth Loop Confirm ELZ at cut out complies with DNO requirements, (Where 8 Impedance (ELZ) applicable).

Protection against Fit appropriate shrouds in cut out wearing LV gloves. 9 direct contact Replace cut out cover if necessary to prevent contamination while installing chamber/cabinet.

Fix CT Fix CT chamber securely above service head. 10 chamber/cabinet

Fix CT’s and connect Fix CT’s securely in chamber and in correct direction for energy flow. Size CT’s as appropriate for declared load. Connect secondary 11 wiring applying approved cable identification. If service not ‘live’ connect CT’s as ‘standard’ rotation.

Fit and connect meter Connect 10 mm meter supply cables between service head and 12 supply cables metering back up fuses. If service not ‘live’ connect CT’s as ‘standard’ rotation.

Earth cabinet and Fix and connect supplementary bonding from the cabinet to the connect customers earthing terminal on service head. 13 earth if appropriate Connect customer’s main earth to earthing terminal in accordance with current PME requirements.

Insulation resistance With customer’s main switch in the off position and tails test on customer’s disconnected from the cut out, confirm the insulation resistance 14 tails between phases and earth and neutral and earth and between phases (in accordance with BS7671).

Connect customer’s Connect tails to service head. If service not ‘live’ connect as 15 main tails. ‘standard’ rotation.

16 Check phase barriers. Check that all service head and CT chamber barriers and panels have been re-fitted correctly.

Energise supply Confirm that fuses are correct size and insert fuse carriers wearing 17 (where meter is to be insulated LV gloves and eye protection (and additional PPE, where fitted as per 8.2) appropriate).

If supply is not Leave links in closed position and ALL fuses removed from fuse 18 provided or where carriers meter is NOT fitted.

Seal chamber and Ensure that CT chamber and service head are sealed against illegal 19 service head. interference

20 Good housekeeping. Remove any rubbish/waste that Siemens are responsible for in accordance with OS Environmental Procedures.

Report to Site Report to appropriate person/department and inform of departure 21 Agent/Representative from site. before leaving site

8.4 INSTALLATION OF LV METERING TERMINAL (T) BOX No Action Detail

Report to Site Report to appropriate person/department on site and receive Agent/Representative any induction necessary and or receipt of any safety 1 documentation. This is a legal Health & Safety requirement and must be adhered to at all times.

General risk assessment Carry out visual Risk Assessment of Access/Egress to meter 2 position. In accordance with Safe Working Method 7.1

Specific risk assessment Carry out visual Risk Assessment of metering equipment and 3 surrounding environment. In accordance with Safe Working Method 7.2

Carry out essential tests Using an approved volt stick confirm correct polarity on inside at supply cubicle of supply cubicle. Confirm three phases and neutral present at supply cubicle, using an approved test lamp. The operation of the test lamp 4 must be proved before and after test. Determine standard phase sequence using approved PSI. Confirm ELZ at supply cubicle complies with distribution requirements. (where applicable)

Before any work commences in the cubicle, prove the bus bars are dead using an approved test lamp. The operation of the test 5 Proving dead lamp must be proved before and after test. Lock off MCB where applicable and apply appropriate warning signs.

Fix LV ‘T’ box Mount LV ‘T’ box at a suitable location taking in to account maximum length of cable allowed. 6 Care must be taken when drilling holes to ensure that waste does not fall into cut out/wiring. Clear any debris from inside of cabinet.

Install pilot cable. Install multi-core pilot cable between supply cubicle and ‘T’ box 7 along route agreed with customer.

Mark and connect pilot Mark and connect cables in accordance with MOCOPA 8 cables agreement.

9 Note site details Note all CT details from site.

10 Seal equipment Seal ‘T’ box and supply cubicle against illegal interference.

Energise supply upon Where safe to do so, the supply will be energised up to the 11 request (where meter is customer’s main switch. fitted as per 8.2)

Remove any rubbish/waste materials that Siemens are 12 Good housekeeping responsible for in accordance with OS Environmental Procedures.

Report to appropriate person/department and inform of 13 Report egress from site departure from site.

8.5 INSTALLATION OF HV METERING TERMINAL (T) BOX No Action Detail

Report to Site Agent/ Report to appropriate person/department on site and receive any Representative induction necessary and or receipt of any safety documentation. This 1 is a legal Health & Safety requirement and must be adhered to at all times.

General risk Carry out visual Risk Assessment of Access/Egress to meter 2 assessment position. In accordance with Safe Working Method 7.1

Specific risk Carry out visual Risk Assessment of metering equipment and assessment surrounding environment. In accordance with Safe Working Method 3 7.2

Carry out essential Using an approved volt stick confirm correct polarity at the test tests at test block block. 4 Confirm supply is present at test block, using an approved test lamp. The operation of the test lamp must be proved before and after test. Determine standard phase sequence using approved PSI.

Before any work commences in the cubicle, prove the bus bars are dead using an approved test lamp. The operation of the test lamp 5 Proving dead must be proved before and after test. Lock off MCB where applicable and apply appropriate warning signs.

Fix HV ‘T’ box Mount HV ‘T’ box at a suitable location taking in to account maximum length of cable allowed. 6 When drilling holes ensure that internal barriers are in position. Clear any debris from inside of cabinet.

Install pilot cable. Install multi-core pilot cable between supply cubicle and ‘T’ box 6 along route agreed with customer.

Connect pilot cable Gland off and connect pilot cable. Mark cables in accordance with 7 MOCOPA agreement.

8 Note site details Note all CT and VT details from site.

9 Seal equipment Seal ‘T’ box and supply cubicle against illegal interference.

Good housekeeping Remove any rubbish/waste materials that Siemens are responsible 10 for in accordance with OS Environmental Procedures.

Report egress from Report to appropriate person/department and inform of departure 11 site from site.

8.6 HV CT OPERATED METER INSTALL OR CHANGE TO PANEL ONLY No Action Detail

Carry out risk Carry out visual Risk Assessment of Access/Egress to meter assessment position. 7.1 2 Carry out visual Risk Assessment of metering equipment and Environment. 7.2

Capture meter data Obtain remote download of any existing meters stored data by Data 3 Collector.

Preliminary checks Carry Out preliminary checks on existing metering equipment 4 including Voltage checks, Earthing checks, Phase Rotation and take final readings from any meters to be replaced.

Confirm and record site Confirm and record VT/CT Details, Ensure VT and CT Burdens are 5 details not exceeded.

Isolate metering Isolate Metering system by removing metering fuses and shorting 6 equipment CT Links.

Proving dead at meter Prove Voltage Terminals to be dead using approved test lamp. The 7 test terminal block operation of the test lamp must be proved before and after test. Confirm visually that CT’s are shorted out.

Install/change metering Remove old meter and communications equipment where 8 equipment necessary and Install new Meter and communications equipment.

Carry out visual wiring Ensure that all cables are identified in accordance with the 9 checks. MOCOPA agreement and are in good condition.

Re-energise metering Replace Metering fuses to re-energise metering, checking Phase 10 equipment failure indication is working.

Check correct operation of meter Remove shorting links from CT’s individually confirming correct 11 operation of meter.

Commission new Commission Metering system as per this Code of Practice to prove 12 metering equipment correct operation and communications.

Protection against direct Blank off any redundant holes and slots to protect against direct contact contact with exposed live parts. 13 Seal all metering and associated equipment against illegal interference.

Good housekeeping Remove any rubbish/waste materials that Siemens are responsible 14 for in line with OS environmental procedures.

Report egress from site Report to appropriate person/department and inform of departure 15 from site.

8.7 COP 4 TESTING OF HV AND LV METERS

No Action Detail

Report to Site Agent/ Report to appropriate person/department on site and receive any induction 1 Representative necessary and or receipt of any safety documentation. This is a legal Health & Safety requirement and must be adhered to at all times.

A general risk assessment must be carried out in accordance with Safe General risk 2 Working Method 7.1. assessment

A specific visual inspection to evaluate the risks must be conducted in Specific Risk 3 accordance with Safe Working Method 7.2. Assessment

Capture meter data Obtain remote download of any existing meters stored data by Data Collector. 4 Record readings

Ensure that existing meter and associated equipment is functioning Check operation of correctly. 5 existing metering

Confirm and record meter and CT/VT Details. 6 Confirm site details

Isolate metering Isolate metering system by removing metering fuses. 7 equipment Short out CT’s by closing links

Proving dead at meter Prove voltage terminals to be dead using approved test lamp. The test terminal block operation of the test lamp must be proved before and after test. 8 Confirm visually that CT’s are shorted out.

Connect COP4 test equipment and injection kit if required. Connect test 9 equipment

Test meter 10 Complete COP4 tests.

Remove metering fuses and close CT links to enable safe disconnection of De-energise metering test equipment. equipment and 11 disconnect test equipment

Replace metering fuses and open CT links to restore meter to normal Re-energise metering 12 running. equipment

Commission metering system to prove correct operation. Commission metering 13 equipment

14 Seal all equipment Reseal all metering and associated equipment against illegal interference.

Remove any rubbish from site. 15 Good housekeeping

Report to appropriate person/department and inform of departure from site. Report to Site 16 Agent/Representative before leaving site

8.8 INSTALLATION OF HALF HOURLY SUB METER No Action Detail

Carry out risk Carry out visual Risk Assessment of Access/Egress to meter position.

assessment Carry out visual Risk Assessment of metering equipment and 2 Environment.

Fix meter cabinet Fix meter cabinet and meter securely, adjacent to customers switch 3 chamber and meter fuse.

Carry out essential Using Testoscope confirm correct polarity on sub main isolator tests at sub main Confirm three phases and neutral present, using test lamp (prove

isolator before and after use) 4 Determine standard phase rotation using PSI (Indicator). Confirm ELZ complies with distribution requirements.

Isolation The customer’s isolator must be switched off and access gained to the 5 customers fuses and incoming cable tails.

Fix C/T’s and connect Fix C/T’s securely over cable tails inside customers switch fuse. Size

C/T’s as appropriate for declared load. Connect secondary wiring 6 checking for approved cable identification.

Fit and connect meter Connect meter supply cables between incoming terminals of customer 7 supply cables switch and metering back up fuses.

Check phase barriers. Check that all C/T chamber barriers and panels have been re-fitted 8 correctly.

Energise supply Confirm that fuses are correct size and insert fuse carriers wearing LV 9 (where meter is fitted) gloves (and additional PPE, where appropriate).

Check correct Remove shorting links from CT’s individually confirming correct operation 11 operation of meter of meter.

Commission new Commission metering system as per this Code of Practice to prove correct 12 metering equipment operation and communications.

10 Seal meter and meter Report to appropriate person/department and inform of departure from site. cabinet.

Good housekeeping. Remove any rubbish/waste that Siemens are responsible for in accordance 11 with OS environmental procedures.

Report egress from Report to appropriate person/department and inform of departure from site. 12 site

APPENDIX 1 (Appendix 11 of the MOCOPA)

IMPACT OF EU HARMONISATION OF CABLE COLOURS

This Appendix commenced from 1st January 2005

A11.1 For whole current metering, load-carrying conductors shall be marked either L and N for single phase supplies, or L1, L2, L3 and N for multi phase supplies, whenever metering work is carried out. The markings shall be applied as a minimum: a) at the meter terminals (except the incoming terminals where security devices are fitted); and b) at any equipment fitted by a Meter Operator, Distribution Business or UMetS provider on the outgoing side of the meter which interfaces to the customer’s installation (eg isolation/supply switch, timeswitch, terminal blocks).

The markings may be by printed tape, tag or other suitable permanent medium.

A11.2 The Meter Operator shall only connect a new customer’s circuit provided it is clearly and unambiguously identified at the end to be connected, either by colour or marking (eg L, L1, L2, L3, N), in accordance with the current version of BS 7671.

A11.3 Meter Operators, Distribution Businesses and UMetS providers will adopt the new conductor colours for load carrying conductors they provide for all new and replacement wiring. For avoidance of doubt, the insulation of multi phase conductors may be either a. all brown (but marked L1, L2, L3 at both ends*) or b. brown, black and grey (and additionally marked in accordance with 1).

(*for conductors of less than 500mm in length and visible throughout, marking at one end may be considered acceptable)

All neutral conductors shall have blue insulation and marked N in accordance with 1.

A11.4 For avoidance of doubt, the outer sheath may be any colour. This may include grey. It is recommended that only one outer sheath colour is used for new and replacement cables for both phase and neutral conductors.

A11.5 Distribution Businesses adopt the BEBS 12 standard ferruling marking at the interface (test terminal block and/or fuses/link) for all new and altered wiring. At the Distribution Business terminations, the markings shall be: CTs: D11, D10, D31, D30, D51, D50 (odd is “feed”)

(Where a common return is used, then D10, D30, D50 become D70) Metering Potentials:

E10 or E11, E30 or E31, E50 or E51 (depending on whether the interface is the fuse/link or the test terminal block after the fuse).

A11.6 Distribution Business CT metering secondary voltage and current conductors shall be either: a) all one colour; or

b) brown, black, grey (phase colours) and blue (neutral).

all one colour for all new and altered wiring.

A11.7 Meter Operators shall adopt the BEBS 12 ferruling marking for all new and altered CT metering wiring, and all CT metering secondary voltage and current conductors shall be: a) all one colour; or b) Brown, black, grey (phase colours) and blue (neutral).

For avoidance of doubt, this may be a different colour to that provided by the Distribution Business. Auxiliary wiring (eg pulse, rate change and communications signals) does not need to conform, but should be suitably identified.

For clarity, the BEBS12 requirements in A11.5 and A11.7 secure a clear identification of the different conductors and should be adopted as best practice for identification.

APPENDIX 2

DOOR STEP PROTOCOL

It is very important to ensure that all Company Field Staff adhere to the National Doorstep Protocol and conduct themselves in the correct manner when working at customers’ premises.

x Staff must always display their identity card.

x Staff must always be friendly, courteous, sensitive to the customer’s needs and be non-threatening. x Staff must be of smart appearance and wearing the current branded uniform.

x Vehicles must be clean and tidy and in a presentable condition. x Any password held on record shall be quoted on arrival at customer’s premises. x Staff must introduce themselves to the customer in the following manner:

¾ Staff must offer their ID card for verification by the customer and display it at all times.

¾ Good morning/ afternoon/ evening Customers’ Name (where practicable)

¾ Your name from Siemens Operational Services providing metering services for (Supplier’s Details eg, British Gas, EDF etc)

¾ Here to carry out (give a job description) on their behalf

¾ Give an indication of the length of time the job will take to complete.

x Staff must verify the customer’s name, address and supplier. If details are different then the correct information must be documented in the “Operatives Remarks” on the MDT.

x Staff must invite the customer to power down appliances and equipment and advise that the supply will be interrupted.

x Staff must ensure adequate precautions are taken to protect customer’s property.

x Accidental damage caused to a customer’s property must be reported to AIRLine/ Area Manager immediately. The operative must make every effort to resolve the issue whilst on site. x Staff must not smoke, drink alcohol or take drugs on the customer’s premises.

x Staff must demonstrate the operation of the metering equipment, i.e. Prepayment Meters.

x Staff must allow extra time to demonstrate prepayment meters to elderly and disabled customers. If the customer is deaf then staff should talk to the consumer “face to face” as they maybe able to lip-read.

x Staff must ensure that the Disability Discrimination Act 1995 and any subsequent amendments are adhered to at all times. x Staff must be mindful at all times of their duties under the Health and Safety at Work etc Act 1974.

x All information must be treated as confidential as defined under the Data Protection Act 1995. x Staff must not give tariff advice or compare Suppliers in any way.

APPENDIX 3

MANAGEMENT OF METER STOCKS WITHIN THE FIELD

It shall be the Operatives responsibility to ensure that all off circuit meters / associated equipment are returned to the local storage location or reused as per contractual requirements (as in agreed certification time). Any faulty metering equipment must be identified with the appropriate fault label and returned to the appropriate storage location.

Meters must be segregated in the vehicle and storage locations so that they can be easily identified in relationship to the asset owner and to allow stock rotation to take place.

Consideration must be given to staff that are not installing meters for long periods of time. Meters must be returned so they are available for installation by other Operatives.

It remains the Operatives responsibility to maintain correct vehicle stock levels in line with contractual requirements and company policy. This is to ensure that the correct meter relating to the asset owner is installed in line with the suppliers’ job instructions.

Meters shall be electronically scanned where contractual requirements dictate, from the storage location to the vehicle and from the vehicle to the wall and visa versa where applicable. Off circuit good meters MUST be reused in line with contractual and company requirements.

Non scanned meters must be recorded manually, either via MDT or ECO. Information will be returned for deprogramming.