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Electrical Specification Cu19 ELECTRICAL SPECIFICATION CU19 12/1/2011 Page 1 of 198 Electrical Specification - Rev A Contents REVISION HISTORY ELECTRICAL STANDARD INTRODUCTION DEFINITIONS AND REGULATIONS City University Site Safety Standards and Regulations Safety Access for Plant Installation/Removal Maintenance Isolation of Plant and Machinery ELECTRICITY SUPPLY Primary HV Distribution Secondary LV Distribution Low Voltage Supplies Switchgear - Tripping and Closing Supplies Portable Power Tools DESIGN CRITERIA AMTECH Electrical Design Software STANDARD OF MATERIALS / APPROVALS SUITED KEY SYSTEM HIGH VOLTAGE & LOW VOLTAGE SAFETY REGULATIONS HV SUPPLY / DISTRIBUTION PROTECTION AND METERING Instrument Transformers Metering HV SWITCHGEAR TRANSFORMERS General Fluid Immersed Transformers Dry Type Transformers 12/1/2011 Page 2 of 198 Electrical Specification - Rev A TRIPPING / CLOSING SUPPLIES Capacity of tripping supplies LV SUPPLY / DISTRIBUTION PROTECTION AND METERING REVISION HISTORY Instrument Transformers Metering Tariff Metering LV SWITCHROOMS LV SWITCHBOARDS General Enclosure Busbars Cabling Earthing Labelling Incoming and Outgoing Devices UNIT TYPE SWITCHBOARDS LV BUSBAR INSTALLATION DISTRIBUTION BOARDS - GENERAL General MCB Distribution Boards POWER FACTOR CORRECTION EQUIPMENT General Capacitors 12/1/2011 Page 3 of 198 Electrical Specification - Rev A POWER FACTOR CORRECTION EQUIPMENT CONTINUED… PFC unit construction INSTALLATION AND TESTING General Installation ESSENTIAL SUPPLIES STANDBY GENERATORS Controls And Interfaces Engines And Alternators Erection / Installation / Equipment Enclosures UPS SYSTEMS Controls And Interfaces System Overview System Operation and Performance Battery Unit Inverter Protection Devices Controls Testing and Commissioning CABLING SYSTEMS CABLE SELECTION / INSTALLATION General LV CABLES IN CONDUIT AND TRUNKING Cables Installation Circuit Protective Conductors Cable Sizing and Circuiting PVC/PVC INSULATED AND SHEATHED CABLES General PVC Insulated and Sheathed Cable - Surface Installation ARMOURED CABLES - PVC OR XLPE INSULATED - LV/HV Cables Cable Terminations Installation of Armoured PVC/XLPE Insulated Cables Electrical Specification Contents 12/1/2011 Page 4 of 198 Electrical Specification - Rev A 11kV Cabling ELV Cable Instrumentation / Control / TELEMETRY Cable Communication Cable Mineral Insulated Cables CABLE / FIXING AND CONTAINMENT Cable Termination / Cable Jointing Underground Cabling Cable Fixings Cable Ladder Cable Trays Cable Trunking Cable Basket Conduit Systems Metallic Conduit and Fittings Non-Metallic Conduit and Fittings Conduits and Fittings - Flameproof EARTHING AND BONDING General LIGHTNING PROTECTION General Testing/Commissioning SURGE PROTECTION DEVICES HAZARDOUS AREAS CLASSIFICATION Area Classification Equipment Classification INSTALLATION Cables and Wiring EQUIPMENT Motors Lighting Socket Outlets Materials INSPECTION AND MAINTENANCE Initial Inspection STATIC ELECTRICITY Building Finishes Plant Metalwork Isolated Conductors 12/1/2011 Page 5 of 198 Electrical Specification - Rev A Pipes Earthing points for Portable equipment Identification Testing and Certification LIGHTING GENERAL LIGHTING Luminaire Standards Luminaire Installation Wiring Installations Lighting Control Lighting Levels EMERGENCY LIGHTING Emergency Luminaire Systems Emergency Luminaire Installation And Testing REVISION HISTORY Testing Wiring Installation Emergency Lighting Control Lighting Levels EXTERNAL LIGHTING Wiring Installation External Lighting Control Lighting Levels LV POWER GENERAL LV POWER Isolators / Switches Socket Outlets Wiring Installations ELECTRIC HEATING / FROST PROTECTION Trace Heating Space Heating MOTORS General Three Phase Motors Single Phase Motors Commissioning 12/1/2011 Page 6 of 198 Electrical Specification - Rev A PACKAGED PLANT Design Requirements MCC PANELS General Enclosure Busbars Cabling Earthing Labelling Switching Devices Motor Starters Control Power Supply Unit BUILDING SERVICES FIRE ALARMS Fire Detection And Alarm Systems System Operation Specialist Supplier/Manufacturer Installation Details Testing and Commissioning Audibility Tests Documentation HSSD Systems Fire Extinguishing Systems Specialist Systems Standard Equipment Control Panels Automatic Devices Manual Devices Electrical Specification Contents Sounders SECURITY SYSTEMS General DATA COMMUNICATIONS VOICE COMMUNICATIONS BUILDING MANAGEMENT SYSTEMS IDENTIFICATION OF ELECTRICAL SYSTEMS Labelling City University Standards Shock Treatment Card TESTING, COMMISSIONING AND RECORDS 12/1/2011 Page 7 of 198 Electrical Specification - Rev A TESTING AND COMMISSIONING Plant Installation Test Schedules And Certificates Spares/Tools, Instruction Manuals Etc Working Drawings, Record And As-Fitted Drawings, Approvals Witness Tests Works Tests Acceptance Maintenance Contracts REVISION HISTORY 12/1/2011 Page 8 of 198 Electrical Specification - Rev A NOTE TO CONTRACTORS Whilst some references in these specifications refer to may US standards all specifications standards are to be based on current BS and or DIN standards 12/1/2011 Page 9 of 198 Electrical Specification - Rev A 1 ELECTRICAL STANDARD 1.1.1 The aim of this standard is to contribute to a co-ordinated electrical distribution system. New installations and modifications to existing parts of the system could cause adverse consequences to other users within City University and to the public supply network. 1.1.2 The University operates high voltage generation in parallel with the public supply network and is therefore subject to the requirements of the G59 code. The site’s main incoming supply is at 11kV. 1.1.3 All proposed modifications to the electrical distribution system, without exception, must be approved in advance by the Operations Department. This includes submission of drawings and calculations in sufficient detail to allow the Operations Department to assess the proposed modification. The Operations Department has absolute discretion to accept or decline any proposed modification or to request additional information. Therefore Contractors, Designers and Consultants should allow adequate time for this process as the Operations Department will not allocate resources to this activity to meet external deadlines. 1.1.4 All LV devices down to main isolators on final distribution boards shall be four pole or two pole unless specifically agreed in writing with City University operations Department. 1.1.5 Any equipment, cables, containment made redundant by works, including containment and fixings are to be removed from site and disposed of in accordance with relevant regulations. 1.1.6 Any making good or fire stopping made necessary by the removal of redundant equipment, cables, containment and fixings is to be included in the scope of the works including making good to finishes. 1.1.7 All equipment to be included in any installation shall be of a type and duty appropriate for the intended use. 1.1.8 Where there is an ongoing maintenance requirement, designers shall ensure that there is full and proper access for maintenance without use of specialist access equipment. 1.1.9 It is a fundamental expectation that all new plant and equipment can be accessed using at most a 1.8m step ladder and that persons of all heights and statures can easily perform any maintenance operation required. 1.1.10 Where controls or electronics are used these must be fully documented and of the open protocol type. No proprietary closed protocol equipment will be accepted under any circumstances. 12/1/2011 Page 10 of 198 Electrical Specification - Rev A 2 CONTROL OF DOCUMENT 2.1.1 Prior to commencement of each project design, tender or installation ensure that the Specification is the current copy. Obtain any amendments or appendices from City University Operations Department. It is the Designers and/or Installers responsibility to check he is in possession of the latest issue. 2.1.2 The Specification shall be controlled by City University Operations Department. No copy, either in its entirety, or parts thereof, shall be taken during the design, tender or installation, without prior written permission of City University Operations Department. No modification, adjustment, alteration or amendment shall be made to the Specification without approval by the City University Operations Department. 2.1.3 Any anomalies, discrepancies or errors considered to be found in the Specification during design, tender or installation shall be identified to City University Operations Department for verification. REVISION HISTORY REV DATE REVISION BY A 7/01/11 General revision and update DW/GH 12/1/2011 Page 11 of 198 Electrical Specification - Rev A 3 GENERAL 3.1.1 The Specification is intended to define and outline the minimum standards, including workmanship, safety, etc., expected from the Designer and/or Installer of Electrical Works at City University. It is not intended to be read in isolation, and careful cross-reference shall be made with all other City University Standard Specifications, Regulations and relevant Standards. 3.1.2 In the Specification when the word Installer is used, this shall mean the Company and/or Electrical Contractor appointed to carry out the design and/or installation, procurement and testing of the Electrical Engineering Services and Works. 3.1.3 If Particular Project Specification items are at variance with the Standard Specification sections then the Particular Specification shall take precedence. Deviations from this Specification shall not be permitted unless prior agreement is received in writing from
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