30 Amp Nema L14-30P Power Inlet Box For 4 Prong Generator Cord,, Etl Listed. ?ETL Listed?30A, 125/250V, 7500W Power Inlet Box, equipped with L14-30P male configuration, for use with all generators up to 7,500 Running Watt. The preferred accessory for portable generators and backup power supplies. ?3.1" Larger Space? Dimension 6.1*4.1*3.1 inch, with removable front panel for easy inspection and quick wiring, what's more, better heat dissipation and long service life. ?Threaded Ring Design?It allows locking the plug when using heavy-duty wire to connect generators. Providing a stronger connection and creating a weatherproof connection, ensuring further moisture protection during outdoor use. ?Designed for Outdoor Use?The heavy-duty steel body is covered with anti-rust powder coating to allow the generator to function properly in any harsh environment. A weatherproof seal front cover will protect the inlet when not in use. ?4 Ways to Connect?Design with 1.2" holes in 4 directions(left, right, bottom, back), select a knockout and drill base on actual needs, the rest will maintain weatherproof integrity, which will not degrade over time like rubber plugs.