I want to put an RV hookup on a post next to an RV pad.
Some RVs take 30A/120V, while others take 50A/240V. The main reason for the latter is to let you run two AC units at once, but in our mild climate we never need to use the AC. I just want a neater setup than running an extension cord.
In addition to the 30 outlet, I want to include a 20A convenience recep.
I have seen RV hookup panels with a 30A breaker + recep, and a 20A breaker + recep. I think that means running two separate circuits from the upstream panel, right? I think I can share ground, so I would have 4 conductors total.
Maybe I should put a 30A sub panel at the site, running a single 10/3 cable underground.
What is a good way to set this up?
Best Answer
You can share ground, but I believe you'll get into code issues if you share the neutral, so you'll need 5 wires (Hot 30 Neutral 30 Hot 20 Neutral 20 Ground 20&30) even though the neutrals probably could be shared from a purely electrical point of view.
Ah, wait - you're saying you'd put a 30A 220V sub-panel on the post, so you'd just need the 4 conductors (L1, L2, N, G) to feed that, and then you'd run the receptacles from that sub-panel. Should work and pass code, don't know that it will be cheaper given the need for an exterior-rated sub-panel and a breaker to feed it. Wire is expensive, but maybe not THAT expensive.
Personally, I'd run 1" schedule 80 conduit and pull individual wet-rated wires rather than run a cable. But that's an opinion