I have a hot tub the requires 4wire (2 hot, ground, neutral). My house has a quick disconnect that's wired 3 wire (2 hot, ground). I have NO way to get a single wire back to the main box to use as a neutral. Any solutions? I was thinking of changing the quick disconnnect out and putting in a new box that wouls let me run a neutral to it. Will this work? Any other solutions would be greatly appreciated.