Etl Listed Weatherproof Generator Transfer Switch Inlet Box For Outdoor, 30P. Safety Certificate: ETL Listed NEMA 3R/PB30 electrical inlet designed for all 30 Amp 4 Prong NEMA L14-30P generator cords. 125/250V, 7500W. Maximum support for 10 AWG wires. When insufficient power and bad weather such as tornadoes and blizzards, power inlet box continuous backup power can be provided and maintained from the generator outside. Larger Space Longer Life: Compared with the old version, our 30 amp power inlet box have increased the wiring space by 50%, 30 amp generator box can be disassembled from the front, making the whole installation easier and faster. Better heat dissipation and longer service life. 4 Ways to Attach: 1.2" drilled holes in 4 areas (Left, Right, Down and Rear) allow direct connection to multi-directional transfer switches and electrical panels. No more seriously bent wires. Weatherproof Antirust: The metal body of the entire generator power inlet box is covered with antirust coating can effectively resist rain, storm, ultraviolet rays and other weather damage. Adopts a clamshell design with waterproof foam inside can prevent wind and moisture. Any harsh environment can be protect in all weathers. WELLUCK Sincere Service: This 30 amp generator inlet box is an upgraded model produced after repeated research and testing according to market demand. We are committed to providing customers with a better experience. If you have any questions, please feel free to contact us!