Non-Fusible Safety Switch With Auxiliary Contact, 60 Amps, 600 Vac. The First Non-Metallic Nema 4X Non-Fusible Safety Switch Line Ul Listed As Suitable As Motor Disconnect Per Nec Article 430.109(A)(6). Pass and Seymour Non-Fusible Safety Switches Feature Extra-Tough Components, Including An Impact-Resistant Valox Nema 4X Enclosure. and An Innovative Design That Delivers Safe, Sure Operation Under The Worst Conditions.