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I have a 200amp main with a 150amp sub panel and I'm not sure of the wire size I would need for an 80 foot run. With the multiple answers I got confused. I was told 2/3 w/ground, 2/0, 2awg or #2. Also, I am running aluminum. Can you please tell me which wire to use? p.s., 20 circuits are being used.

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All of the answers you got were all for the same product, it's just being said differently. 2/0 is the correct wire size. I think this question may be old, so you may have already completed your project. By the way, with copper, the voltage drop on an 80 ' run is 0.8 %. On aluminum it is 1.56%.

At any rate, a 150 amp sub-panel with 20 circuits running on a 200 main amp can easily be overloaded. You should probably have a 300 or 400 amp main with a subpanel that large.

Posted on Jun 16, 2009

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