Travel trailer power cord 15A to 30A, NEMA 5-15P to L5-30R 125V/3750W. Household regular 15A male Plug. Shore Power twist lock 30 AMP female receptacle with locking ring. Pins and terminals are made with nickel-plated brass to prevent oxidation rust. For use when your 30A extension cord (with L5-30 plug) into NEMA 5-15 pedestal power outlet in camping ground or garage to get power. STW 10/3C stranded copper wire, 100% copper conductor inside, support max 30 AMP overload.