机箱NEMA型1,2,4,13•UL外壳1,2,4,13•EN 60529保护程度•IP56目的无屏蔽功能和益处坚固耐用的铸造金属机箱具有足够的重量,以便在存在时保持开关滑动操作所有型号的所有型号都有一个氯丁橡胶盖垫片加O形圈在激活轴上和一个单独的接地螺钉3孔,为地板或设备提供刚性安装,指定了从铸铁构成的材料踏板,盖板和壳体的最大电阻and durability Protected by a strong cast aluminum Shield Painted Alert Orange Single 3/4"-14 N.P.T. threaded conduit entry is standard Options Oversize "O" and "OX" Shield models accept oversized safety shoes and metatarsal foot guards. The "OX" Shield has an additional 3/4" (19.1 mm) opening height as compared to the "O" shield Dual 1/2"-14 N.P.T. threaded conduit entry and metric sizes available to the O.E.M. on special order Special Twin & Triple Models available to the O.E.M. on special order AirVal models are available Potentiometer models are available RF Wireless models are available Hercules models available with cast alluminum base & covers (except unshielded cover which is gray iron)