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 (standard switch and sealing chamber on select models)|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 flame-tight construction|Sealing chamber has prewired factory sealed pigtail leads to switch|Corrosion resistant, strong stainless steel hex head cap screws attach cover/body/sealing chamber assembly for approved flame-tight construction|Threaded stainless steel operating handle provides positive corrosion resistant operation|Choice of front operating or side rocker arm handle-each may be locked in ON or OFF position