Explosion Proof Motors are built for hazardous locations where flammable gases, vapors or combustible dusts may be present. Heavy enclosures with precision-machined flame paths contain any internal ignition, and temperature code (T-code) ratings limit surface temperature. Motors are listed for specific NEC classifications, typically Class I, Division 1, Groups C and D for gases and Class II, Groups F and G for dusts, and serve refineries, chemical plants, grain handling, paint processing and wastewater facilities.