[RE-wrenches] Two Buildings, Two Services, One Roof

[Brian Teitelbaum]

I don't know, Mark, but it seems to me that it might be an issue.

If you have two buildings, each with their own service, and connected to a single T-former on a pole, I would think that you would create a ground loop if you connected the grounds on the two services together. They would be connected together at the T-former (through the common neutral), and also at the grounding electrodes, creating a loop.

Since the neutrals are pulled from the T-formers, I would think that if you had two separate transformers, the neutrals, and hence the grounds, would be isolated from each other, and this wouldn't be a problem.

I'm I off-base here? What think you, esteemed wrenches?

Brian Teitelbaum
AEE Solar



From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Mark Frye
Sent: Monday, April 18, 2011 1:09 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Two Buildings, Two Services, One Roof

I have not yet visited the site to see, but I would guess that they are feed from the same transformer.

If they were, how would that make it OK?

Mark Frye
Berkeley Solar Electric Systems
303 Redbud Way
Nevada City,  CA 95959
(530) 401-8024
www.berkeleysolar.com<http://www.berkeleysolar.com/>


________________________________
From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Brian Teitelbaum
Sent: Monday, April 18, 2011 12:54 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Two Buildings, Two Services, One Roof
Mark,

Are both buildings being fed from the same utility transformer?

I thank that may be a key question here

Brian Teitelbaum
AEE Solar
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