Hello,

I am rebuilding a Sundance tub and have accumulated the following: Balboa VS510S controller, (2) 5HP pumps (one wired 2 speed, the other wired 1 speed), 1.5HP Waterway blower. All run on 220.

My question is how large of a spa GFCI/disconnect do I need? I see anywhere from 20 to 60 amp disconnects on ebay...

Thanks,
Stan

50A should be enough unless you set it to heat on high speed. Very few tubs can be set this way.