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NOTE: This is an unformatted excerpt from our online fire protection training library.

NEC Requirements

Other NEC Requirements

Hazardous (Classified) Locations

Where fire alarm devices and circuits are installed in locations subject to flammable vapors or combustible dusts, the installation must meet the requirements for a "hazardous (classified) location." The term "explosion proof" is commonly used to describe hazardous (classified) location electrical equipment, but the equipment is not actually explosion proof. The equipment and circuits are actually designed to contain the ignition and inhibit any vapors from migrating into the interior of the equipment. This means that all devices, appliances, and wiring must in the area must meet the requirements of NEC Article 500, Hazardous (Classified) Locations, Classes I, II and II, Divisions 1 and 2.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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