Code of Practice for the Electricity (Wiring) Regulations - 2009 Edition
Code of Practice for the Electricity (Wiring) Regulations - 2009 Edition
Code of Practice for the Electricity (Wiring) Regulations - 2009 Edition
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(2) Installation<br />
(a) The steel trunking installation should be made mechanically and<br />
electrically continuous throughout, and be effectively ear<strong>the</strong>d.<br />
(b) Electrical continuity should be achieved by means <strong>of</strong> connecting a<br />
protective conductor (e.g. copper tape) <strong>of</strong> adequate size across <strong>the</strong><br />
two adjacent ends <strong>of</strong> <strong>the</strong> trunking.<br />
(c) Every entry to <strong>the</strong> trunking installation should be so placed as to<br />
prevent and/or to be protected against <strong>the</strong> ingress <strong>of</strong> water.<br />
14D Plastic or PVC Conduit or Trunking<br />
(1) Construction<br />
(a) Rigid plastic or PVC conduits and conduit fittings should be <strong>of</strong> such<br />
strength to withstand <strong>the</strong> stress under <strong>the</strong> installed conditions. They<br />
should comply with BS4607: Part 1 and 2, BS EN 61386, IEC 61386<br />
or equivalent.<br />
(b) Pliable conduits should be made <strong>of</strong> self-extinguishing plastic material<br />
and comply with BS4607: Part 3 or equivalent.<br />
(c) Adaptable boxes and boxes <strong>for</strong> <strong>the</strong> enclosure <strong>of</strong> electrical accessories<br />
that are made <strong>of</strong> insulating materials should comply with BS4662 or<br />
equivalent and have a minimum wall thickness <strong>of</strong> 2 mm.<br />
(2) Installation<br />
(a) Plastic or PVC conduit or trunking systems should only be installed<br />
where <strong>the</strong>y are suitable <strong>for</strong> <strong>the</strong> extremes <strong>of</strong> ambient temperature to<br />
which <strong>the</strong>y are likely to be subject under <strong>the</strong> installed conditions.<br />
Rigid PVC conduits or trunking should not be used where <strong>the</strong> normal<br />
working temperature <strong>of</strong> <strong>the</strong> installation may exceed 60°C.<br />
(b) Any exposed conductive parts <strong>of</strong> a PVC or plastic conduit system or<br />
trunking should be connected to earth by protective conductor <strong>of</strong><br />
adequate size <strong>for</strong> maintaining an effective continuity. Where <strong>the</strong><br />
plastic or PVC conduit system is made between metal conduit<br />
system, <strong>the</strong> earthing connection should be made at <strong>the</strong> steel<br />
conduit/trunking and at <strong>the</strong> nearest boxes with proper terminals.<br />
(c) The method <strong>of</strong> support and installation <strong>for</strong> rigid PVC conduits should<br />
allow <strong>for</strong> <strong>the</strong> longitudinal expansion and contraction <strong>of</strong> <strong>the</strong> conduits<br />
which may occur with variation <strong>of</strong> temperature under normal<br />
operating conditions.<br />
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