Running line to guest house


Old 07-08-05, 10:02 AM
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Running line to guest house

the guest house i have is 12ft x 17ft it is about 400ft away from power source and the guest house will only be operating a sm fridge, few lights, and a small tv.
my question is what size line, conduit, or anything anybody can help me with
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Old 07-08-05, 10:11 AM
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will only be operating a sm fridge, few lights, and a small tv
You sure? Nobody's ever going to want to run a microwave, a hair dryer, or a vacuum cleaner out there? Or maybe an air conditioner? A space heater? A computer?

Accurate planning is essential to a good design.
Old 07-08-05, 12:33 PM
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Due to the large 400' distance from the main to the outbuilding, you will need to substantially upsize the conductors. I would use direct-burial UF 3 conductor plus ground cable and not bother with that much conduit.

One option:
A 20A multiwire circuit. You will not need a subpanel or grounding rod at the outbuilding. I calculate that you will need at least #6 copper or #4 aluminum to accomodate the large distance at 20A. Based on the price, aluminum is likely the better choice.

This option does not leave much room for expansion as you only get two 20A 120V circuits and no 240V. If you think you might possibly need room for expansion, a 60A subpanel is the way to go.

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