Ground a metal roof? [RE-wrenches]

[matthew tritt]

Are you putting panels on the roof? Are you mounting a service panel?

If  panels are going on the roof (not Unisolar) why not simply ground the
racks and frames in the usual manner? If it's just a service panel,
inverters, etc., why not mount that stuff on a non-metallic mounting board
and ground as usual?

Matt T
----- Original Message ----- 
From: "Windy Dankoff, Dankoff Solar" <windy at dankoffsolar.com>
To: <RE-wrenches at topica.com>
Sent: Thursday, July 24, 2003 10:23 PM
Subject: Re: Ground a metal roof? [RE-wrenches]


> >Windy,
> >
> >We do a fair amount of Unisolar installs here, so the roof grounding
> >question comes up a lot. Theoretically, metal roofs under the PVL's
become a
> >default solar panel, which means they MUST be grounded. If you have a
system
> >mounted to any part of a metal building, that part of the building has to
> >also be grounded.
>
> I'm looking for general advice, not specific to Uni installs.
>
> >The real pain in the patootie is, that to effectively ground a metal
> >structure, all the components should (logically) be bonded to ground.
That
> >means running copper to every damn piece of the building if you want the
> >grounding to be effective. Simply relying on the very imperfect bonding
> >effect of fasteners is, regrettably, not the way to go.
> >
> >Matt T
>
> If you are looking for perfection in grounding, find a metal planet.
> I'm wondering if a reasonable attempt is advisable, without going
> overboard.
>
> Maybe somebody with remote telecom experience will have some
> conventional wisdom on this.
>
> Windy
>
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