What Does It Mean If A Wall Switch Is Installed In A Flammable Or Explosive Location?

In certain industrial or special environments, if the air contains flammable gases, vapors, dust, or fibers, electrical equipment such as Wall Switch can become an accidental ignition source, igniting or detonating flammable materials. The structure, sealing, and fire resistance rating of ordinary switches often fail to meet the extremely high safety requirements of such hazardous environments. Installing ordinary wall switches directly in such locations poses a serious safety hazard.

Many investigations into fires and explosions show that improper installation of switches and sockets is a major source of hazard. Poor wire insulation, abrasions, exposed wire cores, and the intrusion of moisture or dust can all lead to short circuits, sparks, or even direct deflagration.