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 consolidated version consists of the fourth edition (1999) and its amendment 1 (2005). Therefore, no need to order amendment in addition to this publication.

This publication is of high relevance for Smart Grid.