1 piece Marine shore power adapter NEMA 5-15P to L5-30R 125V/1875W. American Household regular 15A NEMA 5-15 male Plug. Shore Power twist lock 30 AMP L5-30 female receptacle with locking ring. Molded with electroplate copper terminal in order to avoid surface oxidation effectively. For use when your RV / Marine 30A Locking L5-30 plug want to get power from Household Regular NEMA 5-15 outlet. Used 10AWG stranded copper inner wire, 100% copper conductor inside, support max 30 AMP loading.