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Hi Guys;<br>
<br>
The islands have accelerated corrosion, but we will see the same
problems even in dry climates, it just might take decades instead of
years. I think galvanic corrosion of AL and CU is such a problem
that we should use the new products available such as the WEEB, and
take advantage of the clarified grounding requirements in NEC 2011.<br>
Basically I think the days of bare #6 CU running all over the array
modules and framing should be over. It was time and money consuming,
caused unnecessary corrosion, and looked bad, plus was it ever
really safer?<br>
My own ground impedance testing says no. The most impedance is
usually found at the connection from the grounding electrode to the
earth itself, not at the array.<br>
<br>
Ray Walters<br>
<br>
On 7/13/2011 2:46 PM, Marv Dargatz wrote:
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<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);">Drake,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);">This is a HUGE problem. If you
want a real earful, talk to John Wiles, Bill Brooks, or
Greg Ball about this.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size: 10pt;
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color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt;
font-family: "Verdana","sans-serif";
color: rgb(31, 73, 125);">See ya!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt;
font-family: "Verdana","sans-serif";
color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt;
font-family: "Verdana","sans-serif";
color: rgb(31, 73, 125);">Marv<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);">Director of Technology and
Support, North America<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family:
"Calibri","sans-serif"; color:
rgb(31, 73, 125);">SolarEdge Technologies, Inc.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size: 11pt;
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color: rgb(31, 73, 125);">Tech Support Mobile:
+530.798.6770<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);">Mobile: +530.392.0356<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size: 11pt;
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<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family:
"Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";">
<a class="moz-txt-link-abbreviated" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>
[<a class="moz-txt-link-freetext" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On
Behalf Of </b>Drake<br>
<b>Sent:</b> Wednesday, July 13, 2011 1:26 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> [RE-wrenches] Fwd: Re: Aluminum Module
Frame To Galvanized Uni-Strut<o:p></o:p></span></p>
</div>
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<p class="MsoNormal"><o:p> </o:p></p>
<blockquote style="margin-top: 5pt; margin-bottom: 5pt;">
<p class="MsoNormal"><br>
Marv,<br>
<br>
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?<br>
<br>
Drake <br>
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