<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><meta http-equiv="Content-Type" content="text/html charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">I would agree loose or not retightened connection. We use ferrels and Cobra X Flex # 6 awg wire, great to work with and those fine strands within the ferrels compress much better then Cu. <div class=""><div class=""><blockquote type="cite" class=""><div class="">On Jan 31, 2022, at 9:00 PM, Maverick Brown <<a href="mailto:maverick@mavericksolar.com" class="">maverick@mavericksolar.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="content-type" content="text/html; charset=utf-8" class=""><div dir="auto" class="">Looks like the wire was not completely seated in the back of the terminal before the set screw was tightened, the set screw grabbed a strand or two and felt as though it was tight, etc. or the screw wasn\u2019t tightened enough. The resistive connection led to a lot of heat causing the insulation to burn. I prefer using ferrules on those big terminals when using smaller than maximum size wire. <br class=""><br class=""><div dir="ltr" class=""><div class="" style="font-family: Helvetica; font-size: 12px;"><div class="">Maverick Brown<br class="">Off-Grid Solar Commander since 2006<br class=""><b class="">Maverick Solar Enterprises, Inc.</b></div><div class=""><b class=""> \u2022 Solar Commander Remote Power</b></div><div class=""><b class=""> \u2022 SunFlow Systems Cathodic Protection <br class=""></b><a href="mailto:maverick@mavericksolar.com" class="">maverick@mavericksolar.com</a><br class="">512-460-9825</div><div class=""><br class=""></div></div></div><div dir="ltr" class=""><br class=""><blockquote type="cite" class="">On Jan 31, 2022, at 7:51 PM, Dave Tedeyan <<a href="mailto:dave@sungineersolar.com" class="">dave@sungineersolar.com</a>> wrote:<br class=""><br class=""></blockquote></div><blockquote type="cite" class=""><div dir="ltr" class="">\ufeff<div dir="ltr" class="">Hi All,<div class=""><br class=""></div><div class="">I was troubleshooting a Schneider system today (not my install, so I don't know the history) and came across a wire where the insulation actually burnt off. See the attached photo. I have never seen anything like it. Does anyone know how this could happen? It was a Conext MPPT 80 600 charge controller going to a 100A breaker, with what appears to be #2 CU wire. This is in a heated shed, and there is no evidence of water leakage. The charge controller was still working just fine. And it was only that last 6" or so of the wire, the rest of it appeared to be fine.</div><div class=""><br class=""></div><div class="">Cheers,</div><div class="">Dave</div><div class=""><div class=""><div class=""> </div>-- <br class=""><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div dir="ltr" class=""></div></div></div></div><div dir="ltr" class=""><table cellpadding="0" cellspacing="0" style="border-spacing:0px;border-collapse:collapse;color:rgb(68,68,68);width:525px;font-size:11pt;font-family:Arial,sans-serif" class=""><tbody class=""><tr class=""><td width="125" valign="top" rowspan="6" style="font-family:Arial,sans-serif;padding:0px 10px 0px 0px;font-size:10pt;border-right:1px solid rgb(236,189,0);width:125px;vertical-align:top" class=""><a href="https://www.sungineersolar.com/" style="color:rgb(51,122,183);background-color:transparent" target="_blank" class=""><img border="0" alt="Logo" width="105" src="https://sungineersolar.com/wp-content/uploads/2019/08/Logo-Image-Only-1.png" style="border:0px;vertical-align:middle;width:105px;height:auto" data-unique-identifier="" class=""></a></td><td style="padding:0px 0px 0px 10px" class=""><table cellpadding="0" cellspacing="0" style="border-spacing:0px;border-collapse:collapse;background-color:transparent" class=""><tbody class=""><tr class=""><td valign="top" style="font-family:Arial,sans-serif;padding:0px 0px 5px 10px;width:400px;vertical-align:top" class=""><span style="color:rgb(236,189,0);font-size:11pt;font-weight:700" class="">Dave Tedeyan, P.E.<br class=""></span><span style="font-size:11pt;font-weight:700" class=""><font color="#ecbd00" class="">Owner | Sungineer Solar</font><br class=""></span></td></tr><tr class=""><td valign="top" style="font-family:Arial,sans-serif;padding:5px 0px 5px 10px;font-size:10pt;vertical-align:top;line-height:17px" class=""><span style="color:rgb(236,189,0)" class=""><span style="font-weight:700" class="">p: </span></span><span style="font-size:13.3333px" class=""><span style="font-size: 10pt;" class="">he | him | his</span></span><span style="color:rgb(236,189,0)" class=""><span style="font-weight:700" class=""><br class="">a: </span></span><span style="font-size: 10pt;" class="">1653 Slaterville Rd.</span> <span style="font-size: 10pt;" class="">| Ithaca, NY 14850</span><br class=""><span style="color:rgb(236,189,0)" class=""><span style="font-weight:700" class="">w:</span></span><a href="http://www.sungineersolar.com/" rel="noopener" style="color:rgb(51,122,183);background-color:transparent" target="_blank" class=""><span style="font-size: 10pt;" class=""> www.sungineersolar.com</span></a><br class=""><span style="color:rgb(236,189,0)" class=""><span style="font-weight:700" class="">c:</span></span><span style="font-size: 10pt;" class=""> (607) 288-2898</span></td></tr></tbody></table></td></tr></tbody></table></div></div></div></div></div></div></div>
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