uclabruins wrote:
There is a 220V line located outside the house that is powering the well. I think I can split it to get 110V 30A. Is this safe?
It is very unlikely that this is an option for a few reasons:
1. As mentioned by others, this is almost certainly a pure 240V circuit without a neutral.
2. Typically, at least in the installations I've seen, the well pump controller (basically a relay) is located in the house, controlled by a switch on the pressure tank. The wire going out to the well is only on when the pump is running.
3. You're likely to run into problems with the breaker tripping due to the demands from the well and the RV simultaneously.
If you don't need the well circuit for the well, and it's just wire that is sitting unused, you could wire it up to a 30A 120V circuit provided it's adequately sized. I would be rather surprised to find a residential well pump that's on a 30A or larger 240V circuit. If it's a on a farm and used for irrigation or something like that, perhaps such a large circuit would be more common.
Unless you're putting your RV in your garage, I would suggest putting the receptacle on the outside rather than the inside of the garage. I'd also suggest at least considering putting in a proper switch for it; 30A light switches are not hard to come by, and most circuit breakers are not really designed for constant switching. This switch can also be placed in a more convenient location than the electrical panel. (There are "switching duty" breakers that are intended for modest amounts of switching, but nowhere near the duty cycle of normal switches.)
