BS 546 – Specification. Two-pole and earthing-pin plugs, socket-outlets and socket-outlet adaptors
Three-pin plugs and sockets of the round-pin type, as used in domestic premises, offices, etc., for standard ratings of 2, 5, 15 and 30 amperes. Interchangeability, safety, materials, construction, dimensions. Supplement No. 2 (AMD 5809) gives additional requirements for switched socket-outlets, for use in a.c. circuits only.
