A 30 Amp Outlet Designed for RVs: Commonly used by larger tent trailers, most camp trailers, and smaller motorhomes. The NEMA designation is TT-30R. A 50 amp outlet: These are common on larger trailers, most fifth wheels, and larger motorhomes.

What size is an RV plug?

A typical 30-amp RV power plug, commonly found on mid-size RVs with only one A/C unit. A 30-amp plug on an RV power cord also has three prongs: one prong is a 120-volt hot wire, one is a neutral wire, and the third is a ground wire.