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Explosion Proof Emergency Lighting Classifications

The Occupational Safety and Health Administration (OSHA) assigns three classes for Explosion Proof Emergency Light standards. The first class contains hazardous and flammable materials. Gas stations, for example, would be required to install this type of fixture because gas is present and is a very flammable material. The second category is characterized by non-hazardous materials that are somewhat flammable. A facility that stores grain would require an emergency light from this category because grain dust is flammable but not to the degree that gasoline is. The third category is the least severe, and includes lightly flammable non-hazardous materials like cotton.

Class 1 Explosion Proof Emergency Lights

Common applications for Class 1 Explosion Proof Emergency Lights are chemical plants, gas stations, nuclear facilities, and any other environment that has a high risk of fire or explosion. The flame-retardant housing used in these fixtures is able to withstand the high-temperature fire that may occur. 

Class 2 Explosion Proof Emergency Lights

Class 2 Explosion Proof Emergency Lights are commonly found in grain storage and food production facilities. These materials may ignite if sparked, but are not nearly as flammable as class 1 materials. Processing plants that handle coal, carbon, magnesium, and aluminum would also require a Class 2 Explosion Proof Emergency Light.

Class 3 Explosion Proof Emergency Lights

Facilities that process and manufacture clothing, for example, would require a Class 3 Explosion Proof Emergency Light. These materials are not necessarily flammable, but fire could spread rapidly through dry materials. If materials like sawdust and wood shavings are present, this class of emergency light is also appropriate.

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