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Old 07-15-2010, 03:29 PM   #1
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Adding electricity to a detached shop


How expensive is it to wire an existing 36x42 shop that is 300 ft. away from the house?
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Old 07-15-2010, 04:04 PM   #2
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That depends upon how much power you want out there ?



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Old 07-15-2010, 04:26 PM   #3
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I am wondering because I am looking at buying a house with a shop and no electricity or water in this huge shop....
The power would be to run a compressor and maybe other tools nothing to complicated....but enough outlets around the shop and lights.
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Old 07-15-2010, 04:58 PM   #4
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There is no power out there now? You'll probably want at least a 60 amp sub panel. Where are you going to get the power from? Is this going to be run from the main panel in the house? How expensive depends largely on if you are doing the work yourself or hiring it out. Have you done any projects like this before? A sub panel is not a project for someone who is not experienced with electrical work, however you can cut back on some of the cost if you dig the trench yourself. 300' is a considerable distance so you'll need to rent a trench machine.

Last edited by teamo; 07-15-2010 at 04:59 PM. Reason: added information
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Old 07-15-2010, 05:23 PM   #5
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The exact distance will matter
Amps = actual load that you need
For 300' & 60a you would need #2 wire to be under 3% voltage drop
50a you would need #3 wire
40a = #4 wire
30A with #6 wire would be 3.6% voltage drop



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