Get up to 45 amps combined power. When connecting to your RV's 50 Amp power cord, don't be limited to just 15 or 30 Amps. Camco's Power Grip™ Power Maximizer draws the combined power from a 15- and 30-amp outlet, which allows your RV to receive up to 45 amps. Will not work when plugged into GFI type outlets. This is a POLARIZED ADAPTER designed solely for recreational vehicles and is not for use with any other adapter or device. Adapter must be used in conjunction with propertly sized circuit breakers.