UDC 621.316.57.025 : 621.316.344                          ET 07

1. Scope

1.1 This Standard covers miniature circuit-breaker boards for use in ac systems having maximum current not exceeding 200 A per phase for incoming circuits and 100 A for .individual outgoing circuits and for use in systems with voltages up to and including 1 000 V ac.

1.2 Requirements for dc applications are not covered.