The Reliance Controls 30 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 includes an NEMA L14-30P inlet plug, six knockout holes, and push-in wire connections. Using one of the four combination 1/2-inch and 3/4-inch knockouts (one on each side, bottom and back), the power inlet box can be wired directly to the transfer switch or panel. The exclusive patented design provides generous wiring space and facilitates rough-in. The face of the box is removable for easy placement and wiring. It is cUL 1008 listed and covered by a 5-year warranty.