[RE-wrenches] Fwd: Re: Aluminum Module Frame To GalvanizedUni-Strut

[Marv Dargatz]

Drake,

This is a HUGE problem.  If you want a real earful, talk to John Wiles, Bill Brooks, or Greg Ball about this.

While you might think that the anodizing on the aluminum would prevent electrical contact to the copper, it doesn't last long with just a little vibration (usually due to wind).  Put this in a coastal environment, and things go bad in a hurry, often in less than one year.  Any island environment is especially bad.


See ya!

Marv
Director of Technology and Support, North America
SolarEdge Technologies, Inc.
Tech Support Mobile:  +530.798.6770
Mobile: +530.392.0356

From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Drake
Sent: Wednesday, July 13, 2011 1:26 PM
To: RE-wrenches
Subject: [RE-wrenches] Fwd: Re: Aluminum Module Frame To Galvanized Uni-Strut


Marv,

It is common practice to run bare copper ground wire over rails and under modules, which will touch the aluminum at various points.  How much of a problem is this going to create in the long run?

Drake

At 07:45 PM 7/12/2011, you wrote:

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Gary,

UL uses a more comprehensive chart for evaluation during the listing process.  But this simplified chart boils it down.  Stainless Steel (there are many grades) is generally very compatible with aluminum.

Copper and Aluminum. . . look out.







See ya!



Marv

Director of Technology and Support, North America

SolarEdge Technologies, Inc.

Tech Support Mobile:  +530.798.6770

Mobile: +530.392.0356



Drake Chamberlin
ATHENS ELECTRIC
OH License 44810
CO license 3773
NABCEP Certified PV




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