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

4B Workmanship and Materials
(1) Workmanship
(a) Good workmanship should be used in the construction and
installation of every electrical installation.
(b) Descriptions of general workmanship are given in Code 25 of the
CoP.
(c) Particular attention should be paid to the workmanship employed in
making joints, terminations and enclosures for the wiring
installations. Reference should also be made to relevant sections in
this CoP:
• Code 13—Conductors, Joints and Connections
• Code 14—Wiring Installation Enclosure
(2) Materials
(a) All materials chosen and used in an electrical installation should be
purposely designed for the intended application and should not
cause harmful effects to other equipment, undue fire risk or
electrical hazard.
(b) Special consideration should be given in choosing materials
purposely designed for electrical installations which are:
(i) exposed to weather, water, corrosive atmospheres or other
adverse conditions;
(ii) exposed to flammable surroundings or explosive atmosphere.
Descriptions of installation in adverse environmental conditions are given
in Code 15.
4C Design, Construction, Installation and Protection
(1) Interchangeability of socket outlets
To ensure proper matching and interchangeability, socket outlets should
be designed, constructed and manufactured to the requirements given in
appendices 1, 2, 3 and 4. Socket outlets of standards mentioned in Table
4(1) which have identical physical dimensions and configurations as those
shown in appendices 1, 2, 3 and 4 are also acceptable.
(2) Protection
(a) Electrical equipment should be mechanically and electrically
protected so as to prevent danger from shock, burn, or other injury
to person or damage to property or from fire of an electric origin.
(b) Mechanical protection includes the provision of barriers, enclosures,
protective covers, guards and means of identification, the display of
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