Enclosures have external mounting lugs for ease of mountingSmooth, rounded integral bushing in each hub protects conductor insulationEnclosures furnished with internal ground screwFactory sealed switches are designed to a UL standard so that any arcing devices are contained within an explosionproof labyrinth switchTumbler switch devices are approved for installation without additional external sealing fittings20 A 4-way and all 30 A models utilize a switch enclosed in separate sealing chamberSmooth double face, accurately ground surfaces on sealing chamber flange mate with cover and body to provide positive flametight constructionSealing chamber has prewired factory sealed pigtail leads to switchThreaded stainless steel operating handle provides positive corrosion resistant operationCorrosion resistant, strong stainless steel hex head cap screws attach cover or body or sealing chamber assembly for approved flame-tight constructionPad lockable in the on or off position