This standard applies to plugs and socket-outlets, cable couplers and appliance couplers with a rated operating voltage not exceeding 1 000 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, with pins and contact tubes of standardized configurations. 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 to -25 °C to 40 °C. The use of these accessories on building sites and for agricultural, commercial and domestic application is not precluded. This standard applies to accessories with screwless type terminals or insulation piercing terminals, with a rated current up to and including 32 A for series I. 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. Products of series II are not allowed and not suitable for use in Europe: References and requirements for products of series II are included in this standard for information purposes only and shall be ignored. With respect to DIN EN 60309-2 (VDE 0623-2):2007-11, the scope has been extended to include 1 kV. Table 104 for position of the protective earthing contact has been modified. In 16.101, the pin contact requirements have been re-described. The sheets 2-1 (continued version 1), 2-II, 2-IIIa, 2-III (continued version 1) and 2-IVa have also been modified. The responsible committee is UK 542.4 "Industriesteckvorrichtungen" ("Industrial plugs and sockets") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.