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<DIV><SPAN class=469515602-21042011><FONT face=Arial>Dan</FONT></SPAN></DIV>
<DIV><SPAN class=469515602-21042011><FONT face=Arial>if I recall from my
younger days as a wrench [car], star washers work properly only when turned
while being crushed. The rotation causes the tines to dig into both surfaces and
literally gouge out metal to lock itself in place.</FONT></SPAN></DIV>
<DIV><SPAN class=469515602-21042011><FONT face=Arial>Simply compressing a star
washer between aluminum and a ground lugs surfaces won't have the same
effect of gouging thru the aluminum oxidation into fresh metal. It's the same
principle used in the WEEB style grounding washers, you got to penetrate.
</FONT></SPAN></DIV>
<DIV><SPAN class=469515602-21042011><FONT face=Arial>That's why star washers are
still allowed for grounding several brands of modules using those cheezy
wire-around-the-screw OEM ground assemblies. </FONT></SPAN></DIV>
<DIV><SPAN class=469515602-21042011><FONT face=Arial>Jim </FONT></SPAN></DIV>
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org]<B>On Behalf Of
</B>dan@foxfire-energy.com<BR><B>Sent:</B> Wednesday, April 20, 2011 4:02
PM<BR><B>To:</B> RE-wrenches<BR><B>Subject:</B> [RE-wrenches] Are Stainless
Steel Star Washers UL 467 compatable?<BR><BR></FONT></DIV><SPAN
style="FONT-SIZE: 10pt; COLOR: #000000; FONT-FAMILY: Verdana">
<DIV>I'm struggling with where I came up with the notion that Nolox coated
Stainless Steel Star washers under copper drop-in ground lugs for
grounding module frames are NEC compliant. Can't seem to lay me fingers on it
in the 2011 NEC. I'm wondering if this might be yet another "Former Life"
things. UL467? a manufacturer specific thing? I'm confoosed and I want to go
outside and play. db<BR></DIV>
<DIV><BR></DIV>
<DIV><BR>Dan Brown<BR>Foxfire Energy Corp.<BR>Renewable Energy
Systems<BR>(802)-483-2564<BR><A
href="http://www.Foxfire-Energy.com">www.Foxfire-Energy.com</A><BR>NABCEP
#092907-44</DIV>
<DIV><BR></DIV>
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