For now I'm doing the garage. First thing: install GFI, Second thing: simplify the rats nest of wiring (the box going to the door opener has 8 pieces of 12 guage romex going to it),
My question: to resolve the mixed guage issue: Can I just replace the fuse in the sub panel with a 15 amp fuse? and leave the 20 Amp breaker in the panel. All that is in the garage is the opener, 2 outlets and 2 lightbulbs.
why would there be a ganged breaker for this circuit? I can only think of a shared neutral unless one leg goes to the garage and the other goes to the family room or the guy was a complete doorknob and just put it in. I probably will get into this when I see why hot and neutral are reversed.