A 30 amp plug has three prongs – a 120 volt hot wire, a neutral wire and a ground wire – and is generally used on RVs with lower load requirements. A 50 amp plug has four prongs – two 120 volt hot wires, a neutral wire and a ground wire – that supply two separate 50 amp, 120 volt feeds.

Can you use 30 amp service on a 50 amp RV?

You can plug a 30-amp RV cord into a 50-amp power receptacle, such as a power pedestal at a campground, by using an adapter. With this type of setup, youll enjoy the full benefits of your RVs 30 amps of power.