Quote:
Originally Posted by 908/930
I'm not an electrician by trade, but your #6-3 would be rated for max 60A breaker at main panel, if running through attic you would derate that wire a little depending on attic temp. As Zeke mentioned you should run the AC direct to main panel or you could run new #3 wire and install 100A subpanel in your laundry room.
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Well, 100A sub is overkill for even a home shop with a welder, compressor, etc. 100A will do a pretty big shop. I read the electrical forum at the Garage Journal (before the the admin banned me for life). I also read Mike Holt and another forum for pros only.
I was going to take the CA test and add it to my license, but I folded my license altogether. I didn't have a lot of the really high voltage knowledge either. I'm a residential electrician, so to speak. In CA that requires a separate cert which I could pass except the hours (over 4000) required working under a C10 electrician (licensed).
I THINK a 60 amp sub will do this. 30 and 40 add up to 70, but you are allowed to have 125% breakers (not a rule in stone) in a panel. No room for a car charger in there, but you might squeeze a lighting circuit w/o a problem.
So Tidybouy, either get on the non pro side of the Electricians Talk or if you wish, tell us about your main service, brand and capacity. There are a lot of ways to skin this cat.
Edit: The shop analogy assumes a one man shop where you can't possibly expect all equipment to run simultaneously. But it does assume you might be plasma cutting with the compressor running and a heater as well. Total demand under usual circumstances will work as an estimate of panel size. YMMV.