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Codes and Standards | Withdrawn Codes and Standards

NFPA 493: Standard for Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I II and III Division I Hazardous Locations - Other Prior Editions

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Item # NFPA493ARCHIV

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Other Prior Editions

Edition	Edition Notes
1936	Last published in National Fire Codes Volume 3 1964-65 Not related to NFPA 493-1969
1969	Was NFPA 493-T in 1967 Not related to NFPA 493-1936
1975
1978	Withdrawn in Nov. 1988 Material now in ANSI/UL 9131988See TCR88F p.75 for rationaleAlso see Article 504 in National Electrical Code

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