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Subpanel #163135
05/01/07 09:19 PM
05/01/07 09:19 PM
K
kinetic  Offline OP
Member
Joined: Apr 2002
Posts: 156
Phoenix, Arizona
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?

2017 / 2014 NEC & Related Books and Study Guides
Re: Subpanel [Re: kinetic] #163140
05/01/07 11:15 PM
05/01/07 11:15 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,290
Estero,Fl,usa
Sure


Greg Fretwell
Re: Subpanel [Re: kinetic] #163154
05/02/07 06:33 PM
05/02/07 06:33 PM
Retired_Helper  Offline
Member
Joined: Mar 2007
Posts: 165
Maine
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 08:44 PM
05/02/07 08:44 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 7,024
Brick, NJ USA
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 05:37 PM
05/04/07 05:37 PM
Niko  Offline
Member
Joined: Aug 2006
Posts: 356
Campbell, CA
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 06:54 PM
05/04/07 06:54 PM
Theelectrikid  Offline
Member
Joined: Apr 2004
Posts: 810
Levittown, PA
I want that garage...

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

Ian A.


Is there anyone on board who knows how to fly a plane?
Re: Subpanel [Re: Theelectrikid] #163250
05/04/07 07:55 PM
05/04/07 07:55 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,290
Estero,Fl,usa
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 08:09 PM
05/05/07 08:09 PM
S
ShockMe77  Offline
Member
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
Can he use 310.15 (B)(6) for his garage feeder ampacity? grin

Re: Subpanel [Re: ShockMe77] #163305
05/05/07 10:48 PM
05/05/07 10:48 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,290
Estero,Fl,usa
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
05/16/07 12:21 AM
05/16/07 12:21 AM
K
kinetic  Offline OP
Member
Joined: Apr 2002
Posts: 156
Phoenix, Arizona
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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