Garage Electrical

Old 08-10-18, 06:14 AM
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Join Date: Aug 2018
Location: USA
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Garage Electrical

So I just bought and moved into a new home. The garage has 3 regular 15 Amp 110V outlets, one on the back wall one up front by the garage door that the outside lights are plugged into on a timer and one in the ceiling for the garage door opener. It also has a 220V outlet on the right wall. The wiring for the 220V outlet is run from the basement through armored flexible conduit to the outlet box on the wall. Inside the house it appears that it is 10/3 wire and connected to 20A double breaker in the box.

I will have a fridge in the garage hooked up to the 110V on the back wall and want to put a work bench in along the back and right sides of the garage and I am afraid I do not have enough 110V power out there for what I want to do. I'm assuming all 3 110V outlets are on the same circuit.

I want to keep the 220V outlet for an air compressor but a medium size 20-30 gallon drawing less than 10A on 220V.

The 10/3 wire running to the 220V circuit should be good for 30A according to what I have looked up so I could replace that 20A breaker with a 30A one.

Can I install a sub panel on that 220V line coming into the garage and break out another 20A 110V circuit and a 10A 220V circuit for the compressor?
Old 08-10-18, 07:48 AM
Join Date: Feb 2016
Location: United States, Virginia
Posts: 1,590
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If you have 10/3 (2hots,1neutral,plus a ground) you can add a 30A subpanel. I believe the smallest double pole breaker is 15A. Also normal US voltage is 120V/240V, not 110V/220V.

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