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Subpanel #163135 05/01/07 08:19 PM
Joined: Apr 2002
Posts: 156
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kinetic Offline OP
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For one reason or another Section 230 has always given me trouble. I have never fully understood it and am looking for some clarification. I am wiring a detached garage and upgrading an existing 200A service to a 400A all-in-one. One main 200A breaker will supply the main house with the other 200A main supplying a 200A 40/42 space 3R subpanel at the detached garage. The problem I am having is that 42 spaces is not enough. With all the circuits in the garage I am still under on the load calcs but over on the breaker spaces. Can I feed an additional subpanel from my 200A subpanel?

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Re: Subpanel [Re: kinetic] #163140 05/01/07 10:15 PM
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Posts: 9,571
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gfretwell Offline
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Sure


Greg Fretwell
Re: Subpanel [Re: kinetic] #163154 05/02/07 05:33 PM
Joined: Mar 2007
Posts: 165
Retired_Helper Offline
Member
shocked That sounds like one busy garage! Is there going to be a workshop in there?

I speak, of course, from Maine, where many folks live in trailers, situated next to palatial garages. grin

Re: Subpanel [Re: Retired_Helper] #163158 05/02/07 07:44 PM
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Posts: 7,234
HotLine1 Offline
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Must be one really nice garage!!
Yes, you can add a sub-panel....or two if needed.

John


John
Re: Subpanel [Re: kinetic] #163238 05/04/07 04:37 PM
Joined: Aug 2006
Posts: 356
Niko Offline
Member
as others have said, yes you can.
can you tell use why or how a garage is using all 42 breakers spaces?
?? confusedJust curious??


Be kind to your neighbor, he knows where you live

Re: Subpanel [Re: Niko] #163243 05/04/07 05:54 PM
Joined: Apr 2004
Posts: 810
Theelectrikid Offline
Member
I want that garage...

...Might have to implode half the section for it though.

Ian A.


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Re: Subpanel [Re: Theelectrikid] #163250 05/04/07 06:55 PM
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Posts: 9,571
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gfretwell Offline
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I am using a pretty big panel in my garage (SqD 20/40) and it is full with a couple tandems and a sub on for the spa.
If you start out with one of those 4 high/2 wide breakers to feed the house the slots start going away fast. I still agree 42 is a lot.


Greg Fretwell
Re: Subpanel [Re: kinetic] #163297 05/05/07 07:09 PM
Joined: Jun 2005
Posts: 821
S
ShockMe77 Offline
Member
Can he use 310.15 (B)(6) for his garage feeder ampacity? grin

Re: Subpanel [Re: ShockMe77] #163305 05/05/07 09:48 PM
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Posts: 9,571
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gfretwell Offline
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310.15 (B)(6) can be used if you are going from the garage to the house but not the other way.


Greg Fretwell
Re: Subpanel [Re: gfretwell] #163741 05/15/07 11:21 PM
Joined: Apr 2002
Posts: 156
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kinetic Offline OP
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It is one killer garage. He is a "Need for Speed" guy and moving part of his shop to his house. Everything seems to be small 220V and it really ate up my panel spaces. We put anything and everything you could think of this place. I am envious to say the least.

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