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If your GFI is in your main bpanel box you can't put one in the dsconnect near spa, the GFi won't work right if you have 2 in the same circuite.
My good friend is an electrician in the IBEW and here's how he did my hook-up.(btw, he did all the labor for free and supplied all the materials minus the Hot tub Panel, total cost for me was $82 and a couple hours or digging. )Here's my sub panel attached to my main panel in my garage. Here's a seperate disconnect attached to the back of my garage.Here's me standing about 15 feet away from it, behind my tub. He told me all of this meets MO building codes.
...total cost for me was $82 and a couple hours or digging....
My spa's A/C pullbox is the "blade" type- pull the T handle to disconnect the power.In going on 4 years, I pull that several times a year- no wear on the contacts whatever- so I contend that this type of disconnect will certainly be up to the task of a spa dis-connect. It's rated for 60 amps, and very sturdily built.I'd expect it to wear no faster than the contacts in the GFI breaker that would otherwise get snapped on and off that many times.