Ground a metal roof? [RE-wrenches]

[matthew tritt]

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.
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
----- Original Message ----- 
From: "Windy Dankoff, Dankoff Solar" <windy at dankoffsolar.com>
To: <RE-wrenches at topica.com>
Sent: Tuesday, July 22, 2003 4:10 PM
Subject: Ground a metal roof? [RE-wrenches]


> Wrenches,
>
> Any opinions about grounding a metal roof on a building, for
> lightning protection of electrical systems in and around the building?
>
> Thanks,
> Windy
>
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