29 CFR Part 1926
§ 1926.407 — Hazardous (classified) locations
OSHA 1926 · Subpart K — Electrical. Full current text with cross-references on BuildSpec.
§ 1926.407 Hazardous (classified) locations. (a) Scope. This section sets forth requirements for electric equipment and wiring in locations which are classified depending on the properties of the flammable vapors, liquids or gases, or combustible dusts or fibers which may be present therein and the likelihood that a flammable or combustible concentration or quantity is present. Each room, section or area shall be considered individually in determining its classification. These hazardous (classified) locations are assigned six designations as follows: Class I, Division 1 Class I, Division 2…
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