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FLAMMABLE AND COMBUSTIBLE LIQUIDS

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Industrial Plants - Electrical

Locations where flammable vapor-air mixtures may exist under abnormal conditions and for a distance beyond Division 1 locations, are classified as Division 2 by Subpart S, Electrical. These locations include an area within:
  • 20 feet horizontally beyond a Division 1 area
  • 3 feet vertically beyond a Division 1 area
  • 3 feet above floor or grade level within 25 feet indoors or within 10 feet if outdoors, from any pump, bleeder, withdrawal fitting, meter, or similar device handling Class I liquids.
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Click on the terms for more information about the requirements in these operations.

Pop-UpClass I, Division 1
Pop-UpClass I, Division 2

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