what size braker and wire should i use to power up my grage that is going to have AC,and like 10 power tools

I am turning my garage in to a work shop and want to add a or some new lines to it from the breaker box but don’t know what size wire or barker to buy I keep popping the one that is there already because it is powering my room a frizzier and when I try to use the compressor and the barker pops, so I wanted to know if I should run two ore more to power an, AC, frizzier, table saw chop saw and like 9 more power tools so I have space for two more barkers just don’t know what size I should use or if two is enough?
the garage is 55 feet long 85 feet wide the distance from the breaker box is 120 feet and my tools are all 120 volts
and it has a 20 amp right now

Filed Under: Used Power Tools


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  1. Snoonyb says:

    What size garage?
    120V-240V tools?
    Distance to the garage?
    Size of existing service?

    Yeh I know, boring details.

  2. Lee W says:

    If it were me, I’d add a breaker box inside the garage. You won’t need much, say 200 Amp box should do the trick.
    This would give you the option of adding a 230 volt compressor or something.
    If you don’t know what you’re doing, CALL AN ELECTRICIAN!
    We are talking about going in to the main breaker box and adding a feed from the main. There’s enough power there to blow you into tomorrow morning if you make one little slip.

  3. fuzzykjun says:

    you will need a 220 line first!! you can not run al that off a 110 volt wire and breaker!! get a 150/200 amp box with main breaker and then run 110 lines off of it to your individual outlets,,,you will not use all out lets at once so you can run quite a few lines,, hire someone who knows the business,,, your insurance will be voided and the local permit people will be peeved if you do it yourself and burn the place down

  4. Perry N says:

    I would run a #4 wire to the garage from the main panel, with 2 hots a neutral and a ground. Install a sub panel with more breaker spaces than you think you need, seems like we are always short. I suppose you know a 220 circuit takes 2 breaker spaces. The a/c will take 30 or 50 amp circuit and the freezer should be on a circuit by itself. I would put the outlets on 20 amp circuits using 12/3. The 12/3 will give you the option of running 2 circuits because of the extra hot, nuetral is common.

  5. Jim W says:

    What you need is a qualified professional electrician to install a sub panel in the garage, it can then feed the whole garage and shop with few problems. The code requirements for separate buildings may be more involved than a DIY should attempt. The panel could be as small as 60 amp to feed what you have.

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