Generac 30Amp 125/250V Raintight Aluminum Power Inlet Box. This power inlet box is designed for generator transfer switch installations where the transfer switch or load center is indoors. Features a NEMA 3R, rated aluminum, type 5052 enclosure that includes a 30A, 120/240V male inlet in NEMA configuration L14-30 on the bottom. It maintains a raintight rating when the cord is connected and is required by most inspectors. Suitable for use with generators between 5500W and 9000W, this power inlet box offers generous wiring space and facilitates rough-in. It is compatible with Pro/Tran transfer switches, Reliance Panel/Link manual transfer panels, and generator-ready load centers. It can be installed indoors or outdoors in an open area where the generator is being used. UL Listed.