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ANSI C37.51-2018 (R2025)
Switchgear - Metal-Enclosed Low Voltage AC Power Circuit Breaker Switchgear Assemblies - Conformance Test Procedures
Applies to all metal-enclosed low voltage ac power circuit breaker switchgear assemblies designed, tested and manufactured in accordance with ANSI/IEEE C37.20.1.
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NEMA: National Electrical Manufacturers Association [nema]