Enclosures have external mounting lugs for ease of mounting|Smooth, rounded integral bushing in each hub protects conductor insulation|Enclosures furnished with internal ground screw|Factory sealed switches are designed to a UL standard so that any arcing devices are contained within an explosionproof labyrinth switch|Tumbler switch devices are approved for installation without additional external sealing fittings|Sealing chamber has prewired factory sealed pigtail leads to switch|Corrosion resistant, strong stainless steel hex head cap screws attach cover or body or sealing chamber assembly for approved flame-tight construction|Threaded stainless steel operating handle provides positive corrosion resistant operation|Designed to prevent arcing of enclosed switches in ignitable atmospheres during connect and disconnect operation of light