General duty fusible switch. 400 A, 240 VAC, 3-pole. 4-wire system. NEMA type-1 (indoor) enclosure. (1) 2 to 600 or (2) 1/0 to 250 KCMIL (copper/aluminium) wire range. 50 HP at 240 VAC (3-phase) NEC standard. 100 HP at 240 VAC (3-phase) time delay. Designed for residential and light commercial applications where duty is not severe. 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 GD. Quick-make, quick-break mechanism (30 to 200 A). 60/75°C conductor rating.