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Old 05-26-2010, 07:19 PM   #1
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Site Wiring Plan

I'd appreciate any input on this project for a home site in Maine. Please see the attached drawing.

I'm building a garage which will have a 200A overhead service, the meter and the Main Disconnect breakers.

I then want to go underground about 150' to a 200A load center in building 1 that then feeds 2 other buildings each with their own 50A load center.

Question 1: What kind of cable do I need to go underground from the garage to Building 1?

Question 2: I also want to have 50A service in the garage? Do I need to return from Building 1 to the garage with another cable, or is there a way to go from the Main Disconnect to a Sub Panel in the garage?

Many thanks.

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Old 05-26-2010, 07:31 PM   #2
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Site Wiring Plan

The only thing I can answer for sure is #3. Install a main 200 amp panel in the garage, not just a disconnect. Then you can install breakers to feed the house and the circuits in the garage. If the two other out buildings are closer to the garage than the house feed them also from the garage panel.

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Old 05-26-2010, 07:53 PM   #3
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Site Wiring Plan

Thanks. That seems like a logical way to do it, but the few 200A breakers for SquareD QO panels that I've seen online seem ridiculously expensive. Maybe I need to do some more research.
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Old 05-26-2010, 09:00 PM   #4
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Site Wiring Plan

What attached drawing?
Answers based on the mood I am in when you ask!
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Old 05-26-2010, 09:30 PM   #5
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Site Wiring Plan

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Old 05-26-2010, 09:54 PM   #6
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Site Wiring Plan

Why go all the way to the house and then back to the garage. Use a 200 amp 3r feed-thru panel on the outside of the garage then go to the garage interior and on to the house.
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Old 05-26-2010, 11:54 PM   #7
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Site Wiring Plan

Why not just use the 200 amp feed thru load centre that way you can run the garage circuit straight shot and the rest can go to the house and from there you can split it however once you pass the main location everything else have to run in 4 conductor format.

There are few breaker panel manufacter do make that verison. so it kinda semi common espcally true with farm locations which I done pretty often on small farms but larger farms the bet is off.

The cost of feedthru breaker panel will save you the extra cost to run back to the garage { in conduit and conductors so you add the cost up fast 150 feet worth of 16mm˛[6awg] that will add up very fast { about 400~600 € } plus your time to trench it}.

I know the Feedthru load centre cost more but as you see the extra materals that don't need it and it will simplify it.


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