<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">My hesitation to that is the compressibility of the neoprene. <div class=""><br class=""></div><div class="">One of the things I like about nylon or similar hard plastics is they don’t compress so you do get a ridged structure. </div><div class=""><br class=""></div><div class="">jay</div><div class=""><br class=""></div><div class="">peltz power<br class=""><div><blockquote type="cite" class=""><div class="">On Jan 28, 2016, at 10:15 AM, Ray Walters <<a href="mailto:ray@solarray.com" class="">ray@solarray.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
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I would use a SS washer with integrated Neoprene rubber gasket. We
use them on roof work, and Unirac uses them under the lag on their
roof flashings. <br class="">
<span id="cid:part1.02090102.09000100@solarray.com"><images.jpeg></span><br class="">
<a class="moz-txt-link-freetext" href="https://www.copperstate.com/shop/429/neoprene-washers">https://www.copperstate.com/shop/429/neoprene-washers</a><br class="">
<br class="">
Thanks,<br class="">
<pre class="moz-signature" cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760</pre>
<div class="moz-cite-prefix">On 1/28/2016 8:25 AM, Jay wrote:<br class="">
</div>
<blockquote cite="mid:18D468F6-F3DF-496E-9B5A-AF6C1A7218EA@gmail.com" type="cite" class="">
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<div class="">Hi Larry</div>
<div class=""><br class="">
</div>
<div class="">I wasn't planning on installing anything between al and al.
Just between SS and al. So the module will still be bolted
directly to the al rack material. I'm not too worried about the
grounding, and certainly not worried enough to install lay in
lugs with copper to each module. </div>
<div class=""><br class="">
</div>
<div class="">As lones pointed out, there are parts that would insulate the
bolt. </div>
<div class="">But as the owner hasn't requested that, not going to suggest
it!</div>
<div class=""><br class="">
</div>
<div class="">I sure didn't plan on stirring the pot like this. </div>
<div class="">Just really wanted some help on sourcing the washers</div>
<div class=""><br class="">
</div>
<div class="">Thanks</div>
<div class=""><br class="">
</div>
<div class="">Jay</div>
<div class="">Peltz power</div>
<div class=""><br class="">
On Jan 28, 2016, at 6:49 AM, Starlight Solar Power Systems <<a moz-do-not-send="true" href="mailto:larry@starlightsolar.com" class=""></a><a class="moz-txt-link-abbreviated" href="mailto:larry@starlightsolar.com">larry@starlightsolar.com</a>>
wrote:<br class="">
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</div>
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Hey Jay,
<div class=""><br class="">
</div>
<div class="">I’m still trying to picture this and had a
thought: If you isolate the module from the rack
electrically with these washers, and both are grounded, and
the two grounds are not at the same potential (different
length ground runs), you may be creating a path for high
voltage into the array in event of a near lightning strike. </div>
<div class=""><br class="">
</div>
<div class="">Also, if the washer is between the two metals,
how will you isolate the bolt that puts them together from
not touching the sides of the holes? Perhaps you need to
look into non-conductive fasteners as well.</div>
<div class="">
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Larry Crutcher<br class="">
Starlight Solar Power Systems<br class="">
<br class="">
</div>
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