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#93164 - 05/05/05 09:13 PM Garage service feeds house  
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Member
Joined: Feb 2003
Posts: 687
Grayslake IL, USA
I looked at a house with a strange set up with the service. The service drop is overhead about 20' to the garage. On the back of the garage is the mast and meter. Inside is a 100a fused disco. Then the load side gos underground in 2" about 30' to the house load center.

I can't find anything in the NEC about this. I keep thinking I read it's not permited some where but maybe I'm thinking of a local thing some place.

They are doing an addition so a larger service will be needed. If keeping with a simular set up what would the proper way to bond and ground? I would say a G-rod at the house and garage plus cold water at the house. Bond only the disco & meter at the garage and pull a EG to the house panel. The house panel would have a insulated nutral bar.

I would proibly just use a meter socket with a built in ocp.

Right now the garage circuit is just double taped of the load side of the disco and gos to a single 20a breaker. Could I just put it on a breaker in the house and run the garage circuit with the house feeders?

Tom
Tom


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#93165 - 05/06/05 12:34 AM Re: Garage service feeds house  
gfretwell  Offline


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Joined: Jul 2004
Posts: 9,076
Estero,Fl,usa
What's the question? The house has a sub panel, the garage is the main building with the service disconnect. Whether you need a 3 wire or 4 wire feeder (reground the neutral etc) depends on if there are other metalic paths. You do need a ground electrode system at both buildings.


Greg Fretwell

#93166 - 05/06/05 08:23 AM Re: Garage service feeds house  
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Grayslake IL, USA
Sorry for not being to the point.

Can the house have a sub panel with the service in a detached garage?

Tom


#93167 - 05/06/05 12:25 PM Re: Garage service feeds house  
gfretwell  Offline


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Joined: Jul 2004
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Estero,Fl,usa
That is not unusual. It is an easy way to increase the service size for a garage shop when the house service was OK. The NEC is silent on which building the service disconnect needs to be in/on.


Greg Fretwell


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