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Class 1 Division 2 Lighting

Kenall Offers Lighting Solutions that Meet Class 1 Division 2 Standards

Kenall provides a number of Hazardous Location LED lighting under the SimpleSeal family. These luminaires are listed for use in classified Class 1 Division 2 locations where a fire or explosion hazard may exist due to flammable liquids or gases being used or stored there. The construction of these Class 1 Division 2 light fixtures is governed by the standard UL 844 and the National Electric Code (NEC) article 501 to provide confidence in the safe operation of lighting fixtures in these hazardous classified environments.

Competetive Edge - Vol 3
Hazardous Location LED Lighting

Flamable Gas Storage Canisters

Kenall's Hazardous Location Listing Bug

What is Hazardous Location LED Lighting?

Personal and property safety in hazardous locations and explosive atmospheres might not sound like a common concern, but the number of hazardous locations in the US numbers in the hundreds of thousands and includes places we visit or drive by every day: retail gas stations, grain elevators, food processors, distilleries, chemical plants, refineries, paint and surface coating application and storage areas, power generation and waste treatment plants are all considered hazardous to some degree. The presence of a specific concentration of fuel in an environment where electric service is also available is the simplest way to explain what makes a location hazardous.

There are a number of organizations that work diligently to prevent accidental fires and explosions:


  • The Underwriters Laboratories (UL)
  • Occupational Safety and Health Act (OSHA)
  • The National Fire Protection Association (NFPA)


As part of this endeavor, the NFPA publishes a comprehensive document on electrical safety, the NFPA 70, National Electric Code (commonly called the NEC). The NEC outlines the requirements for electrical system design and equipment located in hazardous location/explosive atmosphere locations.

Guide to Hazardous Location Classifications

A Guide to Hazardous Location Classifications

What is Class 1 Division 2 Lighting?

The “Class” categorization, defined by the NEC, refers to the type of fuel that is present in an environment. Class 1 covers flammable gases and liquids, Class 2 covers combustible dusts and Class 3 refers to fibers and filings as found in the textile and woodworking industries. Divisions, on the other hand, refer to the severity of the environment. Division I is the most severe environment, as the hazardous atmosphere is always or often present, or becomes present during frequent servicing /repair. With Division 2, the hazardous atmosphere is only available infrequently, for instance in the case of an accidental spill or the failure of a mechanical positive ventilation system. It includes storage/handling facilities, where the fuel is kept in sealed containers or closed systems. This division can also be found adjacent to Division I areas, where the fuel might occasionally be communicated. A Class 1 Division 2 light (C1D1 lighting), based on these definitions, would meet the requirements to be safe around flammable gases and liquids in an environment where the hazardous atmosphere is only available infrequently.

Facility with Class 1 Division 2 Hazardous Location Lighting Requirements

What makes Class 1 Division 2 Lighting Acceptable?

The “Class” categorization, defined by the NEC, refers to the type of fuel that is present in an environment. Class 1 covers flammable gases and Protection for Class I Div. II devices are handled differently based on the device. Acceptable devices include:

  • Products listed for Class I Division I
  • Nationally Recognized Testing Laboratory (NRTL)-listed devices that meet the specific features described by the NEC for Div II installations. For instance, fixtures must be designed to contain arcing and sparking. Also, other construction requirements/tests must be done to determine the maximum operating temperature of every surface of the fixture, inside and out, and then the fixtures must be labeled with the maximum operating temperature or the Temperature Range Code and the maximum ambient temperature (room temperature).
  • The NEC still allows “enclosed and gasketed” or “vapor tight” fixtures, but regulatory agencies have all but eliminated this in practice.