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

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Code 20 PERIODIC INSPECTION, TESTING AND CERTIFICATION 20A Fixed Electrical Installations Specified in Regulation 20(1) (1) Places of public entertainment (2) Premises for the manufacturing or storing of dangerous goods (3) High voltage fixed installations 20B Fixed Electrical Installations Specified in Regulations 20(2), 20(3) and 20(4) 20C Periodic Test Certificate 128
Code 20 PERIODIC INSPECTION, TESTING AND CERTIFICATION 20A Fixed Electrical Installations Specified in Regulation 20(1) Fixed electrical installations having any approved loading at the following types of premises are required to be inspected, tested and certified at least once every year: (1) Places of public entertainment Places of public entertainment as defined in the Places of Public Entertainment Ordinance (Cap. 172) including any place, building, erection or structure, whether temporary or permanent, capable of accommodating the public in or on which a public entertainment is present or carried on whether on one occasion or more; including any concert, stage play, stage performance or other musical, dramatic or theatrical entertainment or any part thereof, any cinematography display, lecture, story-telling, circus, exhibition of pictures, photographs or books, exhibition of dancing, conjuring or juggling, acrobatic performance exhibition of abnormal persons or animals, any sporting exhibition or contest, any bazaar, any merry-go-round, flying wheel or other mechanical device designed for amusement. (2) Premises for the manufacturing or storing of dangerous goods (a) Premises for the manufacturing or storing of dangerous goods classified under categories of the Dangerous Goods (Application and Exemption) Regulations (Cap. 295), previously known as the Dangerous Goods (Classification) Regulations, are as follows: Category 1 — explosives and blasting agents Category 2 — compressed gases Category 3 — corrosive substances Category 4 — poisonous substances Category 5 — substances giving off inflammable vapour Category 6 — substances which become dangerous by interaction with water Category 7 — strong supporters of combustion Category 8 — readily combustible substances Category 9 — substances liable to spontaneous combustion Category 9A — combustible goods exempted from sections 6 to 11 of the Dangerous Goods Ordinance Category 10 — other dangerous substances 129
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CODE OF PRACTICE FOR THE ELECTRICIT
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Page 6G Final Circuits Using 16A In
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Page 17. Display of Labels and Noti
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Page Appendices 208 1. Prescribed R
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Code 1 INTRODUCTION PART I This Cod
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‘cable trunking’ means a manufa
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‘powertrack system’ means an as
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Code 3 APPLICATION 3A General Appli
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Code 4 GENERAL SAFETY REQUIREMENTS
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warning notices and the placing of
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4E Working Space (a) A minimum clea
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Additional lighting should be provi
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(b) Work procedure for High Voltage
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(ii) Keep hands away from any circu
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Code 5 SEGREGATION OF CIRCUIT CATEG
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(i) A minimum horizontal or vertica
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Code 6 CIRCUIT ARRANGEMENT 6A Divis
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(2) Control Each circuit should be
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(4) Permanently connected equipment
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Type of Circuit A1 Ring A2 Radial A
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Code 7 CURRENT DEMAND 7A Current De
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Purpose of Conductors or Switchgear
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Code 8 ISOLATION AND SWITCHING 8A P
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(iv) luminaires (lamp replacement a
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(3) Devices for switching off for m
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Code 9 OVERCURRENT PROTECTIVE DEVIC
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Overload protective devices may hav
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Table 9(1) Limiting Final Temperatu
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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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Page 80 and 81: Table 11(4) Minimum Cross-sectional
Page 82: Table 11(11) Maximum Earth Fault Lo
Page 85 and 86: Code 12 EARTHING ARRANGEMENT 12A Ge
Page 87 and 88: (4) Plate electrode Plate electrode
Page 89 and 90: Code 13 CONDUCTORS, JOINTS AND CONN
Page 91 and 92: (a) the ambient temperature does no
Page 93 and 94: (2) Identification of cable cores (
Page 95 and 96: Code 14 WIRING INSTALLATION ENCLOSU
Page 97 and 98: (b) Flexible steel conduits should
Page 99 and 100: 14E Cable Capacity of Enclosures (1
Page 101 and 102: Table 14(2) Cable Factors and Condu
Page 103 and 104: Table 14(4) Cable Factors and Trunk
Page 105 and 106: Code 15 ADVERSE CONDITIONS INSTALLA
Page 107 and 108: (c) Where cables are to be connecte
Page 109 and 110: (d ) Electrical equipment and wirin
Page 111 and 112: (b) There should be adequate means
Page 114 and 115: Table 15(4) Selection of Electrical
Page 116 and 117: Code 16 OVERHEAD LINE INSTALLATIONS
Page 118 and 119: (2) Any point of the span The condu
Page 120: Code 17 DISPLAY OF LABELS AND NOTIC
Page 124 and 125: Code 18 ALTERATIONS AND ADDITIONS 1
Page 126 and 127: Code 19 FIRST INSPECTION, TESTING A
Page 130 and 131: (b) Examples of the above are dange
Page 132 and 133: Code 21 PROCEDURES FOR INSPECTION,
Page 134 and 135: 21B Testing of Low Voltage Installa
Page 136 and 137: (6) Polarity (a) A test of polarity
Page 138 and 139: (d ) Secondary Injection Test (i) T
Page 140 and 141: will have affected the results of t
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Page 148 and 149: Code 22 MAKING AND KEEPING OF RECOR
Page 150 and 151: Checklists Requirements to be Used
Page 152 and 153: Code 23 & Code 24 (Reserved for Fut
Page 154 and 155: Part II Code 25 GENERAL WORKMANSHIP
Page 156 and 157: equipment should be suitable for th
Page 158 and 159: (2) Installation of PVC insulated,
Page 160 and 161: (c) Where cold compound with plasti
Page 162 and 163: (b) Earth continuity across joints
Page 164 and 165: Table 25(2) Spacing of Supports for
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Page 168 and 169: Code 26 REQUIREMENTS FOR SPECIFIC I
Page 170 and 171: Code 26 REQUIREMENTS FOR SPECIFIC I
Page 172 and 173: (iii) controls and switches of wate
Page 174 and 175: (vi) Except as provided by (vii) wh
Page 176 and 177: (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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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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contact with appropriate socket con
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(ii) between live parts and any oth
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(1) General Appendix 3 Prescribed R
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(d ) An earthing terminal should be
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Appendix 4 Prescribed Requirements
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(5) Screws and connections (a) Scre
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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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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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(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
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Joints and termination Labels bondi
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Socket outlets general installation
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