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Old 09-22-2011, 02:36 PM
frontrange frontrange is offline
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Join Date: May 2008
Location: Colorado Springs
Posts: 289
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Copper will cost you an arm and a leg these days, I know because I just wired my new shop. Aluminum is way cheaper, but you cannot use it in a residence except between a main panel and a sub panel, which IMHO is a better way to go to power a shop.

I had electricians install a 70 foot 100 amp run through the attic to an 8 circuit sub panel in the basement for about $500 including parts just for reference, then I did a few short drops with large gauge copper from the sub panel to the compressor, welder and the machine tools.
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