scope:

This standard applies to plugs and socket-outlets, cable couplers and appliance couplers with a rated operating voltage not exceeding 690 V, 500 Hz and a rated current not exceeding 125 A, primarily intended for industrial use, either indoors or outdoors. This standard applies to plugs and socket-outlets, cable couplers and appliance couplers, hereinafter reffered to as accessories, with pins and contact tubes of standardized configurations and for use when the ambient temperature is normally within the range to -25 °C to 40 °C. 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 domistic and similar general purposes.