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|20 A 4-way and all 30 A models utilize a switch enclosed in separate sealing chamber|Smooth double face, accurately ground surfaces on sealing chamber flange mate with cover and body to provide positive flametight construction|Sealing chamber has prewired factory sealed pigtail leads to switch|Threaded stainless steel operating handle provides positive corrosion resistant operation|Corrosion resistant, strong stainless steel hex head cap screws attach cover or body or sealing chamber assembly for approved flame-tight construction|Pad lockable in the on or off position