Wire size for Sub Panel


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Old 12-02-14, 03:17 PM
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Wire size for Sub Panel

I would like to run electric to a small building 600' from a 100 amp panel in my barn.* I was thinking of putting in a 60 amp panel in the small building.* I looked online and saw that if I use 2/0,2/0,2/0 & #1 underground secondary distribution cable it would have an approximate 3.9 % voltage drop.* If I use 4/0,4/0,4/0 & 2/0 the voltage drop would be 2.45% over the 600'.* Which would you recommend or should I use something else?
Thanks - ECIND
 
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Old 12-02-14, 04:28 PM
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Welcome to the forums.

The voltage drop is based on the load. Most equipment can tolerate a few percent drop in voltage. If yours can't then use the larger wire.
 
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Old 12-02-14, 05:53 PM
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I would like to run electric to a small building 600' from a 100 amp panel in my barn.* I was thinking of putting in a 60 amp panel in the small building
What loads will you have? How many lights, receptacles, etc? Any power tools, compressors or welders to be used there?
 
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Old 12-03-14, 02:28 PM
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I would like to have a compressor, 3-4 lights and ~6 receptacles, possibly a well pump some day.
 
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Old 12-03-14, 06:20 PM
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I looked online and saw that if I use 2/0,2/0,2/0 & #1 underground secondary distribution cable it would have an approximate 3.9 % voltage drop

The compressor is the heaviest load you'll have. I'd go with the 2/0, 2/0........4-wire cable.
 
 

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