BS 196:1961 Specification for protected-type non-reversible plugs, socket-outlets, cable-couplers and appliance-couplers with earthing contacts for single phase a.c. circuits up to 250 volts (PD 5664) (PD 5743) (PD 6384) (AMD 255) (Withdrawn)
Ratings. 5, 15, 30 A, includes single- and double-pole fused plugs for ring main circuits. Dimensions for interchangeability, construction, tests, gauge details and dimensions. Non-reversible feature essential. Appendix on: complete system of key and keyway positions for non-interchangeability between different supply systems, applications.
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