This standard provides specific requirements and guidance for seismic qualification of metal-enclosed power switchgear assemblies. This guide may also be used in other applications in which seismic response of metal-enclosed power switchgear assemblies is a consideration.

This guide may be used by equipment manufacturers to establish procedures that will yield data to substantiate performance claims or by equipment users to evaluate and verify performance of representative devices and assemblies as part of an overall qualification effort. As used in this guide, the word switchgear shall mean metal-enclosed power switchgear assemblies with the requirements as defined in ANSI/IEEE C37.20.1-1987, Standard for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear [4], ANSI/IEEE C37.20.2-1987, Standard for Metal-Clad and Station-Type Cubicle Switchgear [5], and ANSI/IEEE C37.20.3-1987, Standard for Metal-Enclosed Interrupter Switchgear [6]. By definition, metal-enclosed power switchgear assemblies include metal-clad switchgear, station-type cubicle switchgear, metalenclosed interrupter switchgear, and low-voltage power circuit breaker switchgear. This guide does not cover metalenclosed bus or control switchboards. Metal-enclosed power switchgear assemb...