How to Wire a 30-amp RV Plug | It Still Runs If you are wiring the plug to an extension cord rather than directly to the heavy-duty umbilical which is part of the RV’s manufacturer-installed system, ensure the cord is sufficient to safely conduct a 30-amp current. Length of the extension cord will determine the gauge of the wire it must have. Installing a 120-volt 30-amp RV Electric Service PDF fileInstalling a 120-volt 30-amp RV Electric Service This Service is 120-volt with 3 wires. 1 HOT 1 NEUTRAL, 1 GROUND and a SINGLE POLE Breaker. DO NOT USE THE DOUBLE POLE 30-amp Breaker with 2 HOT wires to install. 50 Amp Rv Wiring Diagram | Free Wiring Diagram Assortment of 50 amp rv wiring diagram. A wiring diagram is a streamlined conventional photographic depiction of an electrical circuit. It shows the parts of the circuit as streamlined forms, and also the power as well as signal connections between the devices. 30 Amp Rv Plug | etrailer Add the convenience of a handle to your RV's 30-amp power cord plug with this replacement plug. Features: 30-Amp male plug replaces an old or damaged connector on your RV's power cord Built-in handle makes unplugging connector effortless 55245 Power Grip Replacement Motor Home Power Cord Need wiring diagram/info for wiring 30 amp cord to 50 amp Need wiring diagram/info for wiring 30 amp cord to 50 amp female marine plug I have been using this extension cord for about a year without any problem. Just arrived in Florida RV park and when I plugged the cord into the RV is when I got the GF readout, plus the voltage went low when running the micro wave or water heater.