I could be wrong but doesn't it just consist of wiring in a GFCI receptacle? I've never installed a new tub, but my last two houses have had one. It was just a dedicated circuit to a ground fault protected outlet. That's pretty simple.
It can all depend on the size of the hot tub if i. Had tome i would help you out if you can send me some info on i will give you some info on what you need to get it working
