The Midwest 30 Amp 120/240-Volt 240-Watt Fused (requires 2-fuses installed on the back side of the puller). AC Disconnect has a NEMA 3R-rated steel enclosure that is both rust- and corrosion resistant for outdoor use. This safety switch is intended to disconnect power from an air-conditioning unit and uses lug wire range AWG #14 - 3-copper/aluminum. This single-phase disconnect is ANSI certified and UL listed with a maximum load of 240-Volt.