Heavy duty fusible switch. 800 A, 1200 VAC, 3-pole. 3-wire system. NEMA type-1 (indoor) enclosure. (4) 3/0 to 800 KCMIL MCM (copper/aluminium) wire range. Designed for commercial and industrial applications where safety, high performance and continuity of service are essential. Listed to UL standard 98 enclosed and dead front switches. Suitable for use as service equipment when installed in accordance with the National Electrical Code. Quick-make, quick-break mechanism. 60/75°C conductor rating. Full cover interlocks.