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Codes and Standards | Withdrawn Codes and Standards

NFPA 497A: Recommended Practice for Classification of Class I Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas - Other Prior Editions

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Other Prior Editions

Edition	Edition Notes
1986	Was NFPA 497 in 1975
1992	ANSI approved Became part of NFPA 497 in 1997

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