Single phase, 2 pole, 3 wire, solid neutral, 120/240 volt AC Rated 3 HP at 240 volt AC, with metallic enclosure Typical loads include workshop or hobby room; and water heater, furnace, garage or well pump disconnect 10,000 AIC (short circuit rating) with class H cartridge fuses Padlock attachment for lock off UL Listed, meets NEMA standard KS1 5.00 in. x 7.63 in. x 4.00 in.