The Generac 6377 30-Amp 125/250-Volt 2-Pole Single Circuit Outdoor Manual Transfer Switch can be mounted next to the existing load center to power a single circuit such as a water heater . well pump or small air conditioner during a power outage. This transfer switch includes generator and utility breakers mechanically interlocked . lock nuts . wire connectors and an L14-30 power inlet for easy generator connection. The ground post is incorporated into the enclosure and (3) combination-1/2-inch and3/4-inch knockouts are provided on sides and back for easy wiring in minutes. When the utility power shuts off . you connect a power cord from your generator to the inlet on the transfer switch and start your generator. Then you can switch the utility breaker off . slide over the interlock and switch the generator breaker on. When the utility power is restored . simply do the reverse. This transfer switch is made with a NEMA 3R corrosion resistant aluminum enclosure with a hinged cover for added protection from the elements. It is UL Listed . made in the USA and measures 9-inch x 6-inch x 5-inch and weighs 5-pounds. This item can be used with GP3250 . LP3250 . XG4000 . XP4000 . GP5500 . H5500/E . GP6500E . GP7500E . XG6500 . XG7000E . XG8000E . XP6500E and XP8000E generators (XP units require a switch neutral kit). The Generac 6377 30-Amp 125/250-Volt 2-Pole Single Circuit Outdoor Manual Transfer Switch comes with a 2-year limited warranty. Generac transfer switches should be installed by a professional electrician familiar with electrical wiring and code. Generac manufactures the widest range of power products in the marketplace including portable . RV . residential . commercial and industrial generators.