Most recent
ANSI C37.58-2020
Switchgear - Indoor AC Medium-Voltage Switches for Use in Metal-Enclosed Switchgear - Conformance Test Procedures
Applies to conformance test procedures for ac medium voltage switches rated above 1,000 V as designed, tested and manufactured in accordance with ANSI/IEEE C37.20.4.
NEMA: National Electrical Manufacturers Association [nema]