This Cutler-Hammer CDG321NGB safety switch is a general duty, fusible, cartridge-type switch designed for reliable power control. It features a 3-pole configuration with a solid neutral and operates at 240VAC, suitable for 3-phase applications. With a 30 AMP rating and a maximum of 7-1/2 HP at 240VAC three-phase, it provides robust protection. The switch is CSA/UL approved and designed for surface mounting with convenient bottom and side conduit knockouts..The Cutler-Hammer CDG321NGB is a 30 AMP, 3-pole safety switch with a solid neutral, designed for 240VAC operation. It supports 3-phase, 4-wire configurations and is rated for a maximum of 7-1/2 HP at 240VAC three-phase. This general duty, fusible switch features a single-throw operation and is built for surface mounting. Its dimensions are 6-3/8 inches (162mm) wide, 6-7/8 inches (175mm) deep, and 10-11/16 inches (271mm) high. The unit weighs 5.300 Lbs. (2.40 Kg.) and includes bottom and side conduit knockouts.