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

Classification Basics

Summary

Classification Basics

Areas are classified based on the fire and explosion properties of ignitable materials that are present in the area. Typically, areas are not classified if other ignition sources are normally present, if explosives or pyrophoric materials are present, or if experience has shown that a particular type of installation has not resulted in fires or explosions due to electrical equipment.

Area classification identifies areas where special electrical equipment and wiring methods are required to reduce the likelihood of a fire or explosion.

Special electrical equipment is needed so that the electrical equipment is not an ignition source for the flammable or combustible materials.

Alternatives to the use of special electrical equipment include moving the equipment from the classified area, using circuits with insufficient available energy to ignite the materials in the classified area, and reducing or eliminating the hazard through the use of ventilation or through purging and pressurizing.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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