The Reliance Controls 20 Amp power inlet box is designed for outdoor use and can be hardwired directly to Reliance Controls transfer switches or panels, eliminating need for cords running through windows or doors. This rain-tight, rust-proof unit features zinc-plated steel construction. It includes an NEMA L14-20P inlet plug, six knockout holes, and push-in wire connections. The face of the box is removable for easy placement and wiring. It is cUL 1008 listed and covered by a 5-year warranty.