Originally Posted by jeffmeh
Also, be aware that the empty breaker slots in that GFCI panel are not protected by the GFCI. If you want a 30a system, use a 30a breaker in the main panel and run 10/4 wire. If you want a 50a system, use a 50a breaker in the main panel and run 6/4 wire.
I'm confused by this? What bknifefight suggested works perfectly fine.... the 30a main breaker protects against over current draw and the gfci protects against ground faults.... yes the wires in the wall up to the spa panel have no gf protection but its not needed.... And from what the spa inspector told me the gf I works better if its wired near the load source anyway... which is one of the reasons spa panels are required to be within 10 ft of the spa ( at least were I live) plus its easier to kill the power in an emergency situation.
Its exactly what I did.
I was also told 8/3 wire (which has four wires including the ground) is fine for up to 50a.... my hot tub needs 60a so I ran four separate 6 gauge wires.