scope:

This standard applies to plugs and socket-outlets, cable couplers and appliance couplers with a rated operating voltage not exceeding 690 V d.c. or a.c. and 500 Hz a.c., and a rated current not exceeding 250 A, primarily intended for industrial use, either indoors or outdoors. This standard applies to plugs and socket-outlets, cable couplers and appliance couplers hereinafter referred to as accessories, for use when the ambient temperature is normally within the range -25 °C to 40 °C. These accessories are intended to be connected to cables of copper or copper alloy only. The use of these accessories on building sites and for agricultural, commercial and domestic application is not precluded. Socket-outlets or appliance inlets incorporated in or fixed to electrical equipment are within the scope of this standard. This standard also applies to accessories intended to be used in extra-low voltage (ELV) installations. This standard does not apply to accessories primarily intended for domestic and similar general purposes.