IEC 60309-1:1999
Plugs, socket-outlets and couplers for industrial purposes - Part 1: General requirements
Prises de courant pour usages industriels - Partie 1: Règles générales
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, 500 Hz a.c. and a rated current not exceeding 250 A, primarily intended for industrial use, either indoors or outdoors when the ambient temperature does not normally exceed 40°C.
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Mandatory Standard according current regulation