Historical
NFPA 497-2021
NFPA 497, Recommended Practice for the Classification of Flammable Liquids, Gases, orVapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas
This recommended practice presents criteria to determine ignitability hazards in chemical process areas using flammable liquids, gases, or vapors to assist in the selection of electrical systems and equipment for safe use in Class I hazardous (classified) locations.
CONTENT PROVIDER
National Fire Protection Association [nfpa]
National Fire Protection Association [nfpa]