<div dir="auto"><div>To be fair, with a standard staubli mc4 inside a properly installed jbox not subject to extreme pressure/temperature conditions, the only difference between thwn and pv cable(assuming similar stranding versions) is how easily the gland grabs on the wire jacket.. in that case the USE version of the staubli has a tighter gland. Kind of a non issue if the interior conditions of the box are stable and not pushing condensation inside the connector via pressure differential....a good reason to seal the conduit if it goes into conditioned space. I tighten them until they grab and in 20 years I've never had one fail in that scenario...Just my anecdotal input..maybe ones might think that clownish. I can't make a claim to the listing requirements. </div><div>Sunny Regards,</div><div data-smartmail="gmail_signature"><br>    </div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, Nov 11, 2025, 11:45 PM Jason Szumlanski 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:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div><div>Haha, that was my comment, not Glenn's. A bulkhead fitting designed for use with THWN is a different story. I was referring to a standard MC4 connector designed and listed for use with Type PV/USE wire only. </div><div><br></div><div data-smartmail="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><font color="#333333" face="Roboto, RobotoDraft, Helvetica, Arial, sans-serif">Florida Certified Electrical Contractor EC13013208</font></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Nov 11, 2025, 9:44 PM William Miller via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">Glenn:</span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">I am one of those clowns:</span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"><a href="https://millersolar.com/MillerSolar/practices/PV_wiring/PV_Cable_wiring/_PV_Cable_Wiring.html" rel="noreferrer noreferrer" target="_blank">https://millersolar.com/MillerSolar/practices/PV_wiring/PV_Cable_wiring/_PV_Cable_Wiring.html</a></span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d">William</span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">Miller Solar</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">17395 Oak Road, Atascadero, CA 93422</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">805-438-5600</span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><a href="http://www.millersolar.com/" rel="noreferrer noreferrer" target="_blank"><span style="color:blue">www.millersolar.com</span></a></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">CA Lic. 773985</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" rel="noreferrer noreferrer" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Glenn via RE-wrenches<br><b>Sent:</b> Tuesday, November 11, 2025 4:11 PM<br><b>To:</b> RE-wrenches<br><b>Cc:</b> Glenn<br><b>Subject:</b> Re: [RE-wrenches] Buchanan Crimp in 1000v Applications and the NEC</span></p><p class="MsoNormal"> </p><div><div><div><div><div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">I have seen some clowns using MC4 connectors with #10 THHN wire to make these splices. That's obviously no bueno. Crazy stuff...</span></p></div><p class="MsoNormal"><br clear="all"></p></div><div><div><div><p class="MsoNormal"><br><br></p></div></div></div></div></div></div><p class="MsoNormal"> </p></div></div></div>
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