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Old 05-29-2012, 08:35 PM   #1
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Underground to garage

A client of mine decided to add power to a garage some 65 ft from the main house. They say no 220 will ever be needed but I'm trying to be proactive. What would be the recommended wire size for the line to the subpanel? The garage will only need 14/2 and maybe one 12/2 circuit. Is it recommended to run 220? If only 110, what wire size for this? Garage is 28x32.


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Old 05-29-2012, 08:39 PM   #2
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I don't know much about Canadian code.

You really need to know exactly what the homeowner is going to be doing in the garage. How many lights and what type? What kind of tools? Air conditioning or heat? Etc.

I'm not sure if Canada has the exception that allows you to run a 20A MWBC and not have to install a sub panel or ground rods, if they do then that can save you some money if 2 X 20A circuits is enough.

The answer is in the details.


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Old 05-29-2012, 08:58 PM   #3
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Thanks for the quick reply Macro. I don't think the use will be for anything other than lights (Probably six), 110 plugs (10) garage door opener (1) and an out side plug for their motorhome. He is a doctor and not a hands on type person ... with tools. t=The garage is a summer cottage addition for storage of boats , ATvs and that type of garage "stuff". Mosy of our codes follow U.S. guidelines (and yes I will check) but if I don't need a heavy duty line and sub-panel, that would be great. Any advice is always welcome.
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Old 05-30-2012, 06:26 AM   #4
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That changes your thinking about a small circuit.
Most motorhomes need a min. 30 amp circuit just for them selves.

You need to do a load calculation to determine exactly what is needed.
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Old 05-30-2012, 12:20 PM   #5
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Originally Posted by Mark Harvey View Post
I'm trying to be proactive
Then you need to figure out what the maximum load will ever be in order to determine what size wire to install to feed the garage. I'd start with the motor home and then add a power circuit and a lighting circuit, min 15A @.
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Old 05-30-2012, 03:38 PM   #6
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If it were me, i would bury 2" PVC, and run #4 AL to a 60 amp sub panel. Leaves plenty of room if more power is ever needed.


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