EDD Regulation for Electricty Installaltions En.Pdf
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KINGDOM OF BAHRAIN ELECTRICITY AND WATER AUTHORITY REGULATIONS FOR ELECTRICAL INSTALLATIONS REGULATIONS FOR REGULATIONS INSTALLATIONS ELECTRICAL KINGDOM OF BAHRAIN ELECTRICITY AND WATER AUTHORITY REGULATIONS FOR ELECTRICAL INSTALLATIONS REGULATIONS FOR ELECTRICAL INSTALLATIONS PREFACE This revised and enlarged edition of the wiring regulation replaces the 1985 edition of the Regulations for Electrical Installations. The EWA has adopted many of the clauses from the latest editions of the IEC, IEE & KUWAIT Regulations, modifying them to suit Bahrain conditions where necessary. It is the intention of the EWA to re- examine these Regulations periodically and to issue amendment sheets whenever it is considered necessary. Engineers, Consultants, and Contractors are advised to contact the Electricity Distribution Directorate at six monthly intervals and collect any such amendment sheets which may have been issued. Certain clauses and tables of the present Regulations are included by permission of the International Electrotechnical Commission which retain the copyright. Some other clauses and material of the present Regulations are included from the 16th edition of the IEE Regulations which retains the copyright. 1 FOR REGULATIONS INSTALLATIONS ELECTRICAL 5 REGULATIONS FOR ELECTRICAL INSTALLATIONS CONTENTS 1. Scope 13 2. Definitions 16 3. General requirements for electrical installations 24 4. Customer service point 29 5. Excess current protection 40 6. Earthing and earth leakage protection 43 7. Wiring and distribution arrangements 48 700 Wires and cables 701 Flexible cords and cables 702 Joints, connections and terminations 703 Bunching and segregation of conductors 704 Rigid metallic conduits 705 Rigid non-metallic conduits 706 Cable trays 707 Cable trunking 708 Flexible conduits 709 Bus bar trunking 710 Final circuits 711 Wiring accessories - Local switches 712 Wiring accessories - Socket outlets and plugs 713 Wiring accessories - Junction boxes & spur boxes 714 Wiring accessories - Lamp holders 715 Wiring accessories - Ceiling roses 716 Wiring accessories - Mounting blocks and boxes 717 Switches and isolators 718 Distribution boards 719 Under floor ducts 720 Conservation of electricity 8. Electric motors, motor circuits and controllers 77 9. Other electrical equipment 83 3 FOR REGULATIONS INSTALLATIONS ELECTRICAL 7 900 Domestic appliances 901 Air-conditioners 902 Electrical Storage water heaters & Electrode boilers 903 Underwater lighting 10. Emergency and Standby systems 88 1000 Emergency systems 1001 Standby systems 11. Inspection and Testing 92 12. Electric Discharge Lamp Installations 96 13. Temporary Electricity Supplies in Construction & 98 Building Sites 14. Appendices, Tables, Graphic symbols Appendix 1 Coordination between conductor size and excess 102 current protection device employed Appendix 2 General methods of installation of cables 106 Table 2.1 Methods of installation 107 Table 2.2 Correction factors for groups of more than three single core cables Table 2.3 Correction factors for groups of more than one multi-core armoured and non-armoured cables Table 2.4 Correction factors for groups of more than one multi-core armoured and non-armoured cables buried in ground Table 2.5 Correction factors for ambient temperatures higher 108 than 40°C to be applied to the current carrying capacity shown in various tables Table 2.6 Current carrying capacity of P.V.C. insulated single 108 core copper cables with or without sheath at 40°C ambient temperature and for installation methods 1,2 and 3 Table 2.7 Current carrying capacity of single core P.V.C. 109 insulated and sheathed copper cables at 40°C ambient temperature for installation method 4 REGULATIONS FOR REGULATIONS INSTALLATIONS ELECTRICAL 4 8 Table 2.8 Current carrying capacity of P.V.C. insulated 110 multicore copper cables at 40°C ambient temperature and for installation methods 4, 5, 6 & 7 Table 2.9 Current carrying capacity of multi-core cross linked 110 polyethylene (X.L.P.E.) copper cables at 40°C ambient temperature and for installation methods 4,5, 6 and 7 Table 2.10 Current carrying capacity of single core and multi- 111 core mineral insulated copper cables at 40°C ambient temperature Table 2.11 Current carrying capacity of multi-core copper 112 cables at 30°C ground temperature for P.V.C. and X.L.P.E. insulated and armoured cables and for installation method 8 Table 2.12 Current carrying capacity and mass supportable for 112 flexible copper cords insulated with silicon rubber Table 2.13 Number of cables that may be installed in cable trays 113 Appendix 3 Capacity of conduits, trunking and underfloor ducts 114 Table 3.1 Capacity of conduits for simultaneous drawing of single core PVC insulated cables for a straight run up to 10 metres without bends Table 3.2 Capacity of conduits for simultaneous drawing of 114 single core PVC insulated cables for a run up to 10 metres with one bend Table 3.3 Capacity of conduits for simultaneous drawing of 115 single core PVC insulated cables for a run up to 10 metres with two bends Table 3.4 Capacity of conduits for simultaneous drawing of 116 different sizes of single core PVC insulated cables in runs up to 10 metres without bends, with one bend and with two bends 5 FOR REGULATIONS INSTALLATIONS ELECTRICAL 9 Tables 3.5 Maximum number of single core PVC insulated 116 cables in trunking of various sizes Table 3.6 Maximum number of single core PVC insulated 117 cables in underfloor ducts of various sizes Appendix 4 Miscellaneous tables and details 119 Table 4.1 Size of earth continuity conductors and earthing lead 119 Table 4.2 Graphic symbols 120 Table 4.3 Connection of 13 A sockets in ring circuit in non- 123 metallic conduit Appendix 5 Testing of PVC insulated single core non-armoured 124 electric cables before installation Table 5.1 Electrical test requirements 125 Table 5.2 Electrical test applied 126 Table 5.3 Physical test requirements 128 Appendix 6 Terms and conditions for providing 11 kV supply 129 Appendix 7 Maximum demand, cable sizes and cut-out/ 132 circuitbreaker sizes Appendix 8 Building permission requirements 133 Appendix 9 Limits of harmonics in the power system 136 Appendix 10 Earth rod arrangement with handhole 138 Appendix 11 List of cables which can be used for installation 140 Appendix 12 Bus riser arrangement for multi-storey buiding 141 Appendix 13 Arms reach 142 Drawings: Ducting arrangement for single customer buildings Ducting arrangement for multi-metering buildings REGULATIONS FOR REGULATIONS INSTALLATIONS ELECTRICAL 6 10 GENERAL NOTES In these Regulations, unless the context otherwise requires "Authority" means the Electricity and Water Authority. "Customer Services means the Customer Services Directorate of Directorate” the Electricity and Water Authority "Person" means a physical and/or legal person. "Customer" including an applicant for a supply of electricity or a prospective customer. "Premises" includes any building, structure, land or place, "Street" includes any square, road, bridle path, pathway, blind-alley, passage, footway, pavement, quay, public garden, or public place. “EDD” means Electricity Distribution Directorate of the Electricity and Water Authority. Any failure on the part of any customer to observe or comply with the requirements of any of the Regulations or any failure on the part of the customer to comply with the provisions of any condition set out in the following sections hereto, shall give the right to EDD to refuse supply of electricity or to discontinue the supply, as the case may be, to the customer in respect of the premises wherever situated in Bahrain in respect of which he is a customer, notwithstanding any contract which may have been previously entered into, and without prejudice to any other rights or remedies which EDD may have against such customer in respect of such failure. Any deviation from these Regulations, even if it is allowed by IEE regulations or other similar regulations, shall be with the approval of EDD. Any such deviation shall be brought to the notice of EDD by 8 FOR REGULATIONS INSTALLATIONS ELECTRICAL 11 consultants/ contractors and approval obtained, before the commencement of construction. These Regulations shall be complied by all including traders and importers of electrical goods. REGULATIONS FOR REGULATIONS INSTALLATIONS ELECTRICAL 9 12 SECTION 1 SCOPE INDEX TO REGULATIONS Subject of Regulation Regulation Number Applicability 101 Compulsory nature of regulation 102 Purpose of regulations 103 Exceptional situations 104 Explanatory Notes 105 Exemption of existing installations 106 Caravans/ pre-fabricated buildings 107 Temporary supply 108 Temporary supply- Additional regulations 109 Lightning protection of buildings 110 REGULATIONS FOR REGULATIONS INSTALLATIONS ELECTRICAL 10 13 101 These regulations are applicable to all electrical installations in any premises fed by the Electricity distribution system of the Kingdom of Bahrain. 102 Compliance to these regulations is compulsory and electrical power supply shall not be made available if these regulations are not met with in their entirety. 103 These regulations are not intended to be design or material specifications but are primarily related to the requirements for electrical installations so as to ensure safety of persons and property from hazards arising from the use of electricity. NOTE: EDD publishes from time to time standard specifications for electrical installation works. It is recommended that all customers make reference to the standard specifications and require compliance