OK, so Iíve been thinking about this, and I think it may be simpler to skip the spa panel and just add a 30 amp 2 pole GFCI to the breaker panel and wire the 10/4 cable directly to the breaker. I know the GFCI breakers are pricy, but if I have to buy a 50 amp 2 pole breaker and run 6AWG wire to the spa panel, the 30 amp GFCI breaker solution with no spa panel would cost about the same, I think.
Hereís the GFCI breaker Iíve been looking at Ė let me know if this would not work for my plan.
So hereís a repost of the breaker box picture, with my plan below it (assuming I decide to tackle this project on my own.)
STEP 1: Turn off the main breaker and remove the panel cover
STEP 2: Test the breakers with a multi-meter to make sure there is no juice flowing thru the lower panel
STEP 3: Replace 4 of the 15 amp breakers with 2 of the tandem breakers linked in post 7 to make room in the panel for the GFCI breaker
STEP 4: Install the 2 pole 30 amp GFCI breaker
. Connect the GFCI pigtail to the neutral/ground bar.
STEP 5: Knock out one of the bottom breaker panel knockouts. Cut a 4 prong dryer receptacle sized hole in the drywall next to a stud about 6Ē beneath the breaker panel. Feed 10/4 cable thru the drywall hole and into the panel. Secure the cable with a NM clamp. The cable Iím looking at using is linked here (yes, itís expensive):
STEP 6: Inside the breaker box, remove the 10/4 cable sleeving up to the clamp. Wire the cableís 2 hot leads and 1 neutral lead to the GFCI breaker. Wire the cableís ground wire to the neutral/ground bar.
STEP 7: Below the breaker box, cut the 10/4 cable long enough to run thru a gang box and wire it to a 4 prong dryer receptacle mounted beneath the breaker panel. Wire the remaining cable to a 4 prong dryer plug. The cable will be unrolled out to the brew shed for a brew session, and plugged into the brewery control panel with a locking plug.
Is there anything in my steps that looks wrong/stupid? I feel confident that I can do this, but I want to make sure itís to code and safe. If either criteria are not being met I wonít do it. Iím not going to build my control panel until Iím certain I have a safe way to power it up.
Thanks in advance for your input.