Enclosures that can contain all kinds of explosions that may occur within its housing are termed as explosion-proof enclosures. To be termed as an explosion-proof enclosure, it should also act as a barrier to the sparks that occur within the housing, and the flammable dust, gases, vapors, and/or fibers that may be present in the outside air. Enclosures with the energy rating of 3R and 4X cannot be used in the hazardous locations and hence cannot be termed as fully explosion-proof. The explosion-proof enclosure for hazardous locations includes the NEMA Type 7, Type 8, Type 9 and Type 10 enclosures