Class I

Hazardous Location Lighting Class IThe presence of flammable gases or vapors may be present in quantities sufficient to produce explosive or ignitable. When these materials are found in the atmosphere, a potential for an explosion exists if an electrical or other source of ignition is present.

Petroleum refineries, and gasoline storage and dispensing areas. Dry cleaning plans where vapors from cleaning fluids can be present. Spray finishing areas. Aircraft hangars and fuel servicing areas. Utility gas plants, and operations involving storage and handling of liquefied petroleum gas or natural gas.

Class II

The presence of combustible dust in the air in sufficient quantities to be explosive or ignitable.

Grain elevators. Flour and feed mills. Plants that manufacture, use or store magnesium or aluminum powders. Producers of plastics, medicines and fireworks. Producers of starch or candies.

Class III

Presence of easily ignitable fibers or flyings exist. Typically these fibers and flyings are not suspended in the air, but can collect around machinery or on lighting fixtures and where heat, a spark or hot metal can ignite them.


Textile mills, cotton gins. Cotton seed mills, flax processing plants. Plants that shape, pulverize or cut wood and create sawdust or flyings.

Hazardous Lighting Classifications

National Fire Protection Association (NFPA) define most actionable classification system for hazardous lighting location in North America. The type of hazardous material present or likely to be present is enough in the air to produce an explosive or flammable mixture.

NFPA establishes regional classifications based on classes, divisions, and zones, and depicts a hazardous lighting location for a specific circle when combined. This classification method provides a description of the possible hazardous substances and their potential to be able to select the appropriate equipment and follow safe installation practices. The Occupational Safety and Health Administration (OSHA) has adopted these hazard classifications of NEC.

Hazardous Lighting Locations

Sometimes electrical equipment must be installed in areas where flammable vapors and gases may be used or may be present. These are often referred to as ” Hazardous locations” and are defined by the National Electrical Code (NEC) of the United States. When equipment must be installed at these locations, there are stringent requirements for the mounting structure, including materials and design requirements. The design of electrical equipment used in a factory or refinery either contains any explosions within the equipment or is designed not to generate sparks with enough energy to cause an explosion. We will grade the ratings so that you can decide which devices are safe in your environment.

Hazardous location lighting is applied in specific industries. Hazardous location lighting needs to withstand the world’s most difficult and challenging commercial and industrial environments. These environments include the concentration of flammable chemicals, dust or fibers that may be released to the atmosphere surrounding the light, often or intermittently, or otherwise stored or transported through those environments in a sealed container. In all cases, SpecGrade LED, based in Columbus, Ohio, is the preferred designer and manufacturer of commercial and industrial lighting systems, offering the risk of meeting or exceeding the standards and electrical specifications of all major North American and European rating agencies and government regulatory agencies. Location LED lighting mechanisms, including OSHA.

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