Code of Practice for the Electricity (Wiring) Regulations - 2009 Edition

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Code 3 APPLICATION 3A General Application of the CoP (a) The CoP applies to all low or high voltage FIXED electrical installations in buildings and premises including those of domestic and commercial buildings, factories and industrial undertakings, except fixed electrical installations which are: (i) exempted by the Director; or (ii) in mobile units such as aircrafts, motor vehicles and sea-going vessels. (b) Gantry and tower cranes, hoists, conveyors, traction equipment and ropeways that are permanently connected to low or high voltage electricity supply are considered as fixed electrical installations. The wiring of such equipment is required to comply with the Wiring Regulations and the CoP applies to them. 3B Application to Category 2 Circuit Category 2 circuits being supplied from a safety source, are not regulated by the Wiring Regulations (except regulation 5(1)). 3C Exempted Fixed Electrical Installations (a) Where the Director is satisfied that an owner is capable of safely installing and maintaining his own fixed electrical installation, the Director may, by order, exempt the owner, his electrical installations, his electrical workers or any combination of them, from any of the provisions of the Electricity Ordinance relating to electrical installations. (b) Although fixed electrical installations belonging to Government and those fixed electrical installations which are exempted by the Director are not required to comply with the Wiring Regulations or the CoP, owners of these installations are at liberty to have their installations complied with the whole or part of the Wiring Regulations and the CoP. 16
Code 4 GENERAL SAFETY REQUIREMENTS 4A General 4B Workmanship and Materials (1) Workmanship (2) Materials 4C Design, Construction, Installation and Protection (1) Interchangeability of socket outlets (2) Protection 4D Identification, Maintenance, Inspection and Testing (1) Identification (2) Maintainability (3) Inspection and testing 4E Working Space 4F Switchroom/Substation (1) Facilities for locking (2) Arrangement of entrance/exit (3) Illumination and ventilation (4) Prohibition of storage 4G Safety Precautions for Work on Low Voltage Installation (1) Work on low voltage installation (2) Work involving the use of electric-arc welding set (3) Precautions for supply connection (4) Precautions for major alteration (5) Use of ladder (6) Use of portable equipment 4H Safety Precautions for Work on High Voltage Installation (1) General (2) Access to H.V. enclosures (3) Work on H.V. electrical equipment 4I General Safety Practices 17
Page 2 and 3: CODE OF PRACTICE FOR THE ELECTRICIT
Page 4 and 5: Page 6G Final Circuits Using 16A In
Page 6 and 7: Page 17. Display of Labels and Noti
Page 8 and 9: Page Appendices 208 1. Prescribed R
Page 10 and 11: Code 1 INTRODUCTION PART I This Cod
Page 12 and 13: ‘cable trunking’ means a manufa
Page 14 and 15: ‘powertrack system’ means an as
Page 18 and 19: Code 4 GENERAL SAFETY REQUIREMENTS
Page 20 and 21: warning notices and the placing of
Page 22 and 23: 4E Working Space (a) A minimum clea
Page 24 and 25: Additional lighting should be provi
Page 26 and 27: (b) Work procedure for High Voltage
Page 28 and 29: (ii) Keep hands away from any circu
Page 30 and 31: Code 5 SEGREGATION OF CIRCUIT CATEG
Page 32 and 33: (i) A minimum horizontal or vertica
Page 34 and 35: Code 6 CIRCUIT ARRANGEMENT 6A Divis
Page 36 and 37: (2) Control Each circuit should be
Page 38 and 39: (4) Permanently connected equipment
Page 40: Type of Circuit A1 Ring A2 Radial A
Page 47 and 48: Code 7 CURRENT DEMAND 7A Current De
Page 49 and 50: Purpose of Conductors or Switchgear
Page 51 and 52: Code 8 ISOLATION AND SWITCHING 8A P
Page 53 and 54: (iv) luminaires (lamp replacement a
Page 55: (3) Devices for switching off for m
Page 58 and 59: Code 9 OVERCURRENT PROTECTIVE DEVIC
Page 60 and 61: Overload protective devices may hav
Page 62 and 63: Table 9(1) Limiting Final Temperatu
Page 64 and 65: Table 9(4) Classification of MCB to
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Code 10 NEUTRAL CONDUCTOR PROTECTIV
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Code 11 EARTH LEAKAGE AND EARTH FAU
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(b) Subject to subparagraph (a) abo
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(Note: 1. An extraneous conductive
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(d ) Where a residual current devic
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(c) Values of k for protective cond
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Table 11(4) Minimum Cross-sectional
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Table 11(11) Maximum Earth Fault Lo
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Code 12 EARTHING ARRANGEMENT 12A Ge
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(4) Plate electrode Plate electrode
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Code 13 CONDUCTORS, JOINTS AND CONN
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(a) the ambient temperature does no
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(2) Identification of cable cores (
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Code 14 WIRING INSTALLATION ENCLOSU
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(b) Flexible steel conduits should
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14E Cable Capacity of Enclosures (1
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Table 14(2) Cable Factors and Condu
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Table 14(4) Cable Factors and Trunk
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Code 15 ADVERSE CONDITIONS INSTALLA
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(c) Where cables are to be connecte
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(d ) Electrical equipment and wirin
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(b) There should be adequate means
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Table 15(4) Selection of Electrical
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Code 16 OVERHEAD LINE INSTALLATIONS
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(2) Any point of the span The condu
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Code 17 DISPLAY OF LABELS AND NOTIC
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Code 18 ALTERATIONS AND ADDITIONS 1
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Code 19 FIRST INSPECTION, TESTING A
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Code 20 PERIODIC INSPECTION, TESTIN
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(b) Examples of the above are dange
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Code 21 PROCEDURES FOR INSPECTION,
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21B Testing of Low Voltage Installa
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(6) Polarity (a) A test of polarity
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(d ) Secondary Injection Test (i) T
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will have affected the results of t
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142
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144
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146
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Code 22 MAKING AND KEEPING OF RECOR
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Checklists Requirements to be Used
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Code 23 & Code 24 (Reserved for Fut
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Part II Code 25 GENERAL WORKMANSHIP
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equipment should be suitable for th
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(2) Installation of PVC insulated,
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(c) Where cold compound with plasti
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(b) Earth continuity across joints
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Table 25(2) Spacing of Supports for
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166
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Code 26 REQUIREMENTS FOR SPECIFIC I
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Code 26 REQUIREMENTS FOR SPECIFIC I
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(iii) controls and switches of wate
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(vi) Except as provided by (vii) wh
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(b) Facilities should be incorporat
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(3) Starting facilities of electric
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than the product of the total stead
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(5) Transformers (a) Every transfor
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(b) Electrical apparatus and wiring
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(f ) Supply from generator set Wher
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manufacturer’s instructions. Othe
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• SELV, the source for SELV being
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protected by an RCD having the char
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(2) Basic protection and fault prot
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plug. The permanent connection to t
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prevent electric shock to electrica
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Table 26(1) Recommended Number of S
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202
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204
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206
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APPENDICES 1. Prescribed Requiremen
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(d ) The spacing of the socket cont
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diameter of the clamping screw and
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214
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216
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contact with appropriate socket con
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(ii) between live parts and any oth
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222
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224
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(1) General Appendix 3 Prescribed R
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(d ) An earthing terminal should be
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230
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232
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234
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Appendix 4 Prescribed Requirements
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(5) Screws and connections (a) Scre
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240
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242
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244
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246
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248
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250
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Appendix 5 Correction Factors for S
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(3) Correction factors for cables e
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Appendix 6 Current Carrying Capacit
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TABLE A6(1) Single-core PVC insulat
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TABLE A6(2) Multicore PVC insulated
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TABLE A6(3) Single-core armoured PV
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TABLE A6(4) Multicore armoured PVC
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TABLE A6(5) Single core XLPE insula
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TABLE A6(6) Multicore XLPE insulate
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TABLE A6(7) Single-core XLPE insula
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TABLE A6(8) Multicore armoured XLPE
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274
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276
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278
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280 Contactor Main make contact of
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282 Junction, connection point
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No. Symbol Description 45. 46. 47.
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No. Symbol Description 68. 69. 70.
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Appendix 10 Degree of Protection Pr
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Appendix 11 Forms of Internal Separ
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Appendix 12 Worked Examples for App
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Appendix 13 A) Schedule of Test Res
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(iii) All joints of metal conduit o
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Checklist No. 4—Additional Items
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(iv) Suitable stay wires installed
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Tested by/Date (N/A if not applicab
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(vii) Protective conductor up to an
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Checklist No. 5—Items for H.V. In
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IEC 60947 Low-voltage switchgear an
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BS 88 Part 6 Cartridge fuses for vo
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References may be made to the follo
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320
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(3) Precautions In the new colour c
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5.2 Single-phase installation Exten
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5.3 Three-phase installation Extens
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enclosure in conduit and trunking i
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Double insulation Duct Earth fault
Page 336 and 337:
Joints and termination Labels bondi
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Socket outlets general installation
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Code of Practice for the Electricity (Wiring) Regulations - 2009 Edition

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