Heavy duty fusible switch. 400 A, 600 VAC, 3-pole. 3-wire system. NEMA type-3R (outdoor) enclosure. (1) 2 to 600 or (2) 1/0 to 250 KCMIL (copper/aluminium) wire range. 50 HP at 240 VAC, 100 HP at 480 VAC, 125 HP at 600 VAC (3-phase) NEC standard. 125 HP at 240 VAC, 250 HP at 480 VAC, 350 HP at 600 VAC (3-phase) time delay. 50 HP at 250 VDC. 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. Meets or exceeds NEMA KS1 standard for enclosed switches type HD. Quick-make, quick-break mechanism. 60/75°C conductor rating. Full cover interlocks.