Heavy Duty Extension Cord: This 3-prong 20 Amp RV cord is a practical extension that helps you connect two different plugs with just one cord. This 125V and 3750Watts cable is specially designed for powering RVs and houses from generators. NEMA L5-30R Twist Lock Connector. GearIT RV extension cable has two different plugs. One of them is a security lock connector NEMA L5-30R. This receptacle lets you plug and twist your cable connector into an inlet box to energize your home or vehicle. Ergonomic Plug Design. Additionally, male connector NEMA TT-30P of the waterproof extension cord has a comfortable handle that allows you to connect and disconnect the cable quickly and easily. Easy to See in the Dark. The bright green long extension cord connects to outdoor RVs, trailers, and more vehicles. It contrasts with dark surfaces at night, and helps prevent accidents in dimly lit spaces. Weather Resistant 20 Amp RV Cord. This STW Rated, ETL Listed, safe certified extension cable performs flawlessly in demanding weather situations. Use it for prolonged exposure to the sun, rain, snow, and temperature changes.