Applies to plugs and socket outlets, appliance couplers and cable couplers with a rated operating voltage not over 690 V, 500 Hz and a rated current not over 125 A, primarily meant for industrial use, either outdoors or indoors. Covers socket outlets or appliance inlets incorporated in or fixed to electrical equipment. Coverage includes standard ratings, classification, dimensions, marking, terminals, provision for earthing, degrees of protection, temperature rise, breaking capacity, mechanical strength, and resistance to rusting. ALSO NUMBERED AS BS EN 60309 PT2