Camco Heavy Duty RV Auto PowerGrip Adapter- Contoured Shape For Easy Grip and Removal (15M, 30 Amp, 125 V, 1875 W) (55223) For use when RV has 30 AMP power and needs to plug into 15 AMP power source Contoured shape for easy removal from outlet Doesn't block spare plug outlet 125V/1875W 5-15P/TT-30R