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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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Item # NFPA497AARCHIV
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DescriptionOther Prior Editions
EditionEdition Notes
1986Was NFPA 497 in 1975Add
1992ANSI approved Became part of NFPA 497 in 1997Add

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