NUSET RV dogbone adapter 30 amp male to 50 amp female locking connector For use when RV is equipped with 50 AMP twist lock power inlet and needs to plug into 30 AMP power source TT-30P male SS2-50R female 10AWG, 125V For use when RV is equipped with 50 AMP twist lock power inlet and needs to plug into 30 AMP power source TT-30P male SS2-50R female 10AWG, 125V