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29 CFR 1910.307: Hazardous (classified) locations

Subpart S—Electrical

880citations since 2015
786employers cited
89%serious, willful or repeat
$1,250median penalty per item

OSHA has cited 29 CFR 1910.307 880 times since 2015, against 786 employers. Penalties on these items add up to $2,853,301 at their current amounts.

Citations per year

The parts of the rule cited most

1910.307(c) · 473 citations

(c) Electrical installations. Equipment, wiring methods, and installations of equipment in hazardous (classified) locations shall be intrinsically safe, approved for the hazardous (classified) location, or safe for the hazardous (classified) location. Requirements for each of these options are as follows:

1910.307(c)(2)(i) · 192 citations

(2) Approved for the hazardous (classified) location. (i) Equipment shall be approved not only for the class of location, but also for the ignitable or combustible properties of the specific gas, vapor, dust, or fiber that will be present.

1910.307(b) · 79 citations

(b) Documentation. All areas designated as hazardous (classified) locations under the Class and Zone system and areas designated under the Class and Division system established after August 13, 2007 shall be properly documented. This documentation shall be available to those authorized to design, install, inspect, maintain, or operate electric equipment at the location.

1910.307(c)(3) · 57 citations

(3) Safe for the hazardous (classified) location. Equipment that is safe for the location shall be of a type and design that the employer demonstrates will provide protection from the hazards arising from the combustibility and flammability of vapors, liquids, gases, dusts, or fibers involved.

1910.307(c)(1) · 27 citations

(1) Intrinsically safe. Equipment and associated wiring approved as intrinsically safe is permitted in any hazardous (classified) location for which it is approved;

1910.307(c)(2) · 17 citations

(2) Approved for the hazardous (classified) location. (i) Equipment shall be approved not only for the class of location, but also for the ignitable or combustible properties of the specific gas, vapor, dust, or fiber that will be present.

1910.307(d) · 14 citations

(d) Conduits. All conduits shall be threaded and shall be made wrench-tight. Where it is impractical to make a threaded joint tight, a bonding jumper shall be utilized.

1910.307(g)(2)(i) · 6 citations

(2) Location and general requirements. (i) Locations shall be classified depending on the properties of the flammable vapors, liquids, or gases that may be present and the likelihood that a flammable or combustible concentration or quantity is present. Where pyrophoric materials are the only materials used or handled, these locations need not be classified.

Industries cited most

  • Manufacturing 584
  • Wholesale Trade 85
  • Mining, Quarrying, and Oil and Gas Extraction 41
  • Transportation and Warehousing 33
  • Other Services (except Public Administration) 33
  • Construction 27

States cited most

Recently cited employers