<div dir="ltr">Also being in NYS, I have been familiar with this requirement for a long time. I believe the idea is that just like how any metal part in a system needs to be grounded, metal roof panels under solar panels are kind of part of the system. What if a wire comes loose and touches the roof? You would not want someone going up there to get zapped. I see the point that the worst you can do with RSD is 80V. But in NY at least, you cant really argue with NYSERDA if they decide they want this. I have never come across a building or electrical inspector here that would care about this, but NYSERDA does and that is where the incentive money comes from...<div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jun 6, 2023 at 2:34 PM Jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div dir="ltr"></div><div dir="ltr">But isn’t the whole concept of RS to prevent the energizing of say a metal roof?</div><div dir="ltr"><br></div><div dir="ltr">The inverter sees a ground fault or ark fault. Trips off line, the RS activate and now it’s less than 80v. Isn’t that what it’s supposed to do?</div><div dir="ltr"><br></div><div dir="ltr">What is the purpose of grounding the metal roof?</div><div dir="ltr"><br></div><div dir="ltr">Jay</div><div dir="ltr"><br><blockquote type="cite">On Jun 6, 2023, at 10:09 AM, Glenn Burt via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
<div style="font-size:10pt"><div dir="auto">If I am not mistaken, this derives from some UL testing that showed that a metal roof may become energized during a thermal event.</div><div dir="auto"><br></div><div dir="auto">I suppose no less important than our RSD requirements...</div><div dir="auto"><br></div><div><div dir="auto">-Glenn</div><div dir="auto">Sent from my 'smart'phone, so please excuse typos and spelling errors.</div></div></div><div style="font-size:10pt"><div id="m_1185497621442179139LGEmailHeader" dir="auto"><div dir="auto"><br></div><div dir="auto">------ Original message------</div><div dir="auto"><b>From: </b>Jason Szumlanski via RE-wrenches<u></u><u></u></div><div dir="auto"><b>Date: </b>Tue, Jun 6, 2023 10:25 AM</div><div dir="auto"><b>To: </b><a href="mailto:offgridsolar@sti.net" target="_blank">offgridsolar@sti.net</a>;RE-wrenches;</div><div dir="auto"><b>Cc:
</b>Jason Szumlanski;</div><div dir="auto"><b>Subject:</b>Re: [RE-wrenches] Bonding Metal Roofs Part II</div><div dir="auto"><br></div></div><div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I'm watching this thread with interest. Is anyone aware of any serious injury or property damage caused by an energized metal roof, and if so, what were the circumstances? Is bonding metal roofs a solution looking for a problem?</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">In response to the ground mount alternative, that isn't really an option in many areas of Florida where the cost can be 50% higher or more to ground mount if it's even practical due to flood level. Tile and shingle roofs in Southwest Florida are being switched to metal at shocking rates in the wake of Hurricane Ian, and we love it from an
installer's standpoint. Fortunately, I haven't run into any bonding inspection issues for over 10 years here.</div><div><div dir="ltr" class="gmail_signature"><div dir="ltr"><br>Jason Szumlanski<div><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Principal Solar Designer | Florida Solar Design Group</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">NABCEP Certified Solar Professional (PVIP)</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Florida State Certified Solar Contractor CVC56956</span></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On
Mon, Jun 5, 2023 at 8:28 PM Dave Angelini Offgrid Solar via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="font-size:12pt;font-family:Verdana,Geneva,sans-serif">
<div id="m_1185497621442179139m_3687784191774037529signature">Hey Adam,</div>
<div> </div>
<div>Creative solution #1 Do not install solar on any roof if you can ground mount it.</div>
<div> </div>
<div>Is this He Adam or the Him Adam?<br>
<pre> </pre>
<pre><strong><span style="font-size:small">Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a href="http://members.sti.net/offgridsolar/" rel="noopener" target="_blank"><span id="m_1185497621442179139mt-tracked-link_1686061271813" style="color:red"></span>http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net" target="_blank">offgridsolar@sti.net</a>
text <a href="tel:209%20813%200060" target="_blank">209 813 0060</a></span></strong></pre>
</div>
<p><br></p>
<p id="m_1185497621442179139m_3687784191774037529reply-intro">On <a href="tel:2023-06-05%203" target="_blank">2023-06-05 3</a>:47 pm, AE Solar via RE-wrenches wrote:</p>
<blockquote type="cite" style="padding:0px 0.4em;border-left:2px solid rgb(16,16,255);margin:0px">
<div id="m_1185497621442179139m_3687784191774037529replybody1">
<div dir="ltr">Hey all,
<div>I had started a thread about bonding to metal roofs in 2018 but can't figure out how to respond via the archive. I know some things have changed since then, so I'm circling back and starting a new thread. </div>
<div> </div>
<div>In NY one of our inspection agencies (NYSERDA) requires bonding of metal roof panels below the array, as well as within a 3' perimeter of the array. S-5! in combination with Ironridge is now listed to bond the roof under the array (so long as you hit every pan with an attachment) but this doesn't solve the problem of
trying to bond within the 3' perimeter. For installs where we are only 18" from the ridge, this means we are required to bond the adjacent roof as well.</div>
<div> </div>
<div>Whenever possible we install Illsco SGB-4 lugs under the ridge cap. But more and more we're finding roofs where the ridge cap feels inaccessible, tricky, or where we simply don't want to get into roof warranty issues associated with opening up a prior contractor's work.</div>
<div> </div>
<div>Wondering if anyone else is coming up against this and what some possible creative solutions might be. I don't want to walk away from potential projects but...</div>
<div> </div>
<div>As always, thanks for any thoughts</div>
<div>Adam</div>
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<div>Adam Katzman (he/him)<br>Autonomous Energies | Owner/Operator</div>
<div dir="ltr"><a href="http://www.autonomousenergies.com" rel="noopener noreferrer" target="_blank"><span id="m_1185497621442179139mt-tracked-link_1686061271813" style="color:red"></span>www.AutonomousEnergies.com</a><br><a href="tel:(518)%20567-1468" target="_blank">(518) 567-1468</a></div></div></div></div></div></div></div></div></div></div></div>
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