<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I recall Bill Brooks noting that the ILSOC ground lugs needed full contact of their back surface with the surface it was mounted to. He was recommending grinding off the oxide coating on the module around the screw hole to achieve the desired contact. Apparently putting a star washer between the lug and the surface didn't meet the UL listing for the lug.<div>Personally I'm a WEEB guy these days.</div><div><br><div>
<span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>R. Walters</div><div><a href="mailto:ray@solarray.com">ray@solarray.com</a></div><div>Solar Engineer</div><div><br class="khtml-block-placeholder"></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span>
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<br><div><div>On Apr 20, 2011, at 9:15 PM, North Texas Renewable Energy Inc wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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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>
<blockquote dir="ltr" style="MARGIN-RIGHT: 0px">
<div class="OutlookMessageHeader" dir="ltr" align="left"><font face="Tahoma" size="2">-----Original Message-----<br><b>From:</b>
<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>
[mailto:re-wrenches-bounces@lists.re-wrenches.org]<b>On Behalf Of
</b><a href="mailto:dan@foxfire-energy.com">dan@foxfire-energy.com</a><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>
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