500-Hazardous _Classified_ Locations
FPN: Rules that are followed by a reference in brackets contain text that has been extracted from NFPA 497-
2004, Recommended Practice for the Classification of
Flammable Liquids, Gases, or Vapors and of Hazardous
(Classified) Locations for Electrical Installations in
Chemical Process Areas, and NFPA 499-2004,
Recommended Practice for the Classification of
Combustible Dusts and of Hazardous (Classified)