This Standard is a conformance testing Standard optionally applicable to all metal-enclosed low-voltage ac power circuit breaker switchgear assemblies designed, tested, and manufactured in accordance with IEEE Std C37.20.1, Metal-Enclosed Low-Voltage AC Power Circuit Breaker Switchgear. This Standard covers selected tests to demonstrate conformance of the basic switchgear section (which includes the structure, circuit breaker compartments, instrument compartments, buses, and internal connections) with the œTests clause of IEEE Std C37.20.1. See IEEE Std C37.20.1 for assigned ratings and usual service conditions. In this Standard, the use of the term LV switchgear shall be considered to mean metal-enclosed lowvoltage alternating current power circuit breaker switchgear assemblies. The use of the term circuit breaker shall be considered to mean low-voltage alternating current power circuit breaker, unless qualified by other descriptive terms. Purpose This Standard specifies the tests that shall be performed to demonstrate that the LV switchgear being tested conforms with the ratings assigned to it and meets the mechanical and electrical performance requirements specified in IEEE Std C37.20.1.