Circlecord 30 Amp 4 Prong Generator Power Inlet Box, Nema L14-30P, Etl Listed ETL Certified: 30 Amp, 125/250V, 7500W, NEAM L14-30 inlet generator plug, suit for all 30 amp NEMA L14-30 generator cord. Max wire Gauge:10 AWG. The best partner for the generator to the house power cord, ETL Certified Pre Drilled: The 4 knockouts were replaced by removable rubber plugs made it easy to remove directly without damaging the power inlet box. No more need for a special tool (such as a driller/knockout punch) to drill. Easy to Open Larger Space: Our power inlet box has 50% more internal space than an ordinary power inlet box. There is plenty of wiring space can make your wiring tidy. The front of the box is removable for easy placing and wiring Easy to Install: 1.2" hole drilling position on 4 areas: Left, Right, Bottom, and Back, easy to connect to transfer switch and electric panel. Also the newly designed 1.2" hole is easy to open, and the front panel is detachable for easy installation Green Light Indicator: The new upgraded version includes a power-on indicator. A clear green indicator on the flip cover will light up when the power connection is successful. It provides an obvious and clear indication, improving performance and increasing safety Emergency Ready: Even in severe weather conditions, such as storms or thunderstorms, our generator inlet box is ready for your home power on