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deepstuff 11-20-2008 11:01 PM

Wire size for sub-panel
Before I finish the ceiling in my basement I want to run a wire to my attached garage to power my 220V welder. According to the manual the welder should be on a 40 amp circuit. My intention is to use this circuit for only my welder now, but later to power a sub panel when I build a detached garage. Once this is built my welder will be relocated to the detached. My question is what size wire do I need? In my detached I should only be using one big apliance at a time with a few lights.

speedy petey 11-21-2008 04:49 AM

Considering your plans I'd go with #6cu wire, and run a neutral even though your welder does not need one. The sub-panel will.
This way you can have a 60A sub-panel, which is a decent size for a residential shop/garage.

deepstuff 11-21-2008 05:00 AM

I need a #6/4 so that I have a ground and a neutral or a #6/3?

speedy petey 11-21-2008 12:58 PM

For a cable it would be 6/3 w/ground.

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