I need to add an additional circuit to the motorhome for the purpose of running additional electric heaters this winter. I have an additional 50A outlet available to me from the RV park so can use this for power.
I need 3 outlets for the 3 heaters drawing no more than a total of 2.5KW. Space in the motorhome is limited and I want to avoid impacting the existing wiring or trying to modify the existing circuit breaker housing/storage.
My thoughts were to make up a 50A plug on 30A wiring protected by a 30A breaker and GFCI outlet. (I can purchase a pre-made cable that is a 50A M to 30A F but as a short adaptor cable, the 30A connection would be exposed to the elements. I don't know if this is necessarily a bad thing). To save on space I was also looking for a combination GFCI Outlet and Breaker if a 30A one is available. I was planning on wiring any ground for this second circuit into the first circuit's ground.
I have heard that the common configuration for motorhome users is to simply run a 30A extension cord from the park outlet to a powerstrip in the motorhome and either connect appliances/outlets to the strip.
What would be the recommended installation in this case?