You may also want to consider investing in a Surge Guard or equal power supply protection. What size service does the coach have; how many prongs are on the end of the power cord? Buy a 50 amp Surge Guard and use an adapter if you have 30 amp for now. If you ever; and you probably will one day upgrade to a 50 amp coach, you will already have the Surge Guard needed for it.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7