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

Appendix 2
Prescribed Requirements for 3-pin (non-reversible)
13 ampere Socket Outlets
(1) General
A 13A outlet to BS 1363 is acceptable subject to complying with the
prescribed requirements of this appendix.
(2) Materials for plate/cover, base and current carrying
parts
(a) Parts made of ferrous metal should be rendered rust proof, special
attention being given to springs and moving parts.
(b) (i) Insulating materials should be tough, non-ignitable and not soften
when heated to a temperature of 100°C
(ii) Current carrying parts, including earthing contact should be made of
brass, copper, phosphor-bronze, and/or other suitable material.
(iii) The material of the shutter should not distort to an extent to impede
its action.
(iv) The enclosure of the socket outlet should be rigid and be capable of
withstanding a minimum force of 4 kg applied over an area of 250
mm2 anywhere on the surface without causing appreciable damage
or reducing the protective clearance below the minimum values
specified in paragraph (6).
(3) Construction of socket outlet
(a) (i) Socket outlets are to be constructed to accommodate the plug
having physical dimensions as detailed in Figure A2(1).
(ii) In this appendix, where reference is made to a plug, it means a plug
having a current rating and dimensions of 13A as detailed in Figure
A2(1).
(b) The configuration of the socket contacts should be as shown in Figure
A2(2).
(c) There should be no projection on the minimum engagement surface of
the socket outlet illustrated in Figure A2(2), such as would prevent the
full insertion of a plug. Raised marking is permitted provided it does not
project more than 0.5 mm from the engagement surface.
(d ) The spacing of the socket contacts should correspond with that of the
plug pins as shown in Figure A2(1).
(e) On insertion of pins into contacts, the travel of the end of either current
carrying pin from the first face of the socket outlet to the first point of
217