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<div>Dave</div><div>Did you make your MC Cables, are there any jumpers used, l have seen crimped terminals cause faults and over time will overheat and fail open. Just a thought.</div><div>Jerry</div><div><br></div><div><br></div><div><br></div><div id="composer_signature"><div style="font-size:88%;color:#364f67" dir="auto">Sent from my Verizon, Samsung Galaxy smartphone</div></div><br><br>-------- Original message --------<br>From: Matthew Sirum <matthewsirum@gmail.com> <br>Date: 11/14/16 1:07 AM (GMT-10:00) <br>To: re-wrenches@lists.re-wrenches.org <br>Subject: [RE-wrenches] SMA Arc-Fault <br><br>Greetings Dave,<br><br>Have you considered possibly installing a hybrid type transient<br>voltage surge suppressor (TVSS), to include filters to remove high<br>frequency EMI/RFI? Or possible a straight line filter device? If<br>this nuisance arc fault issue is still occurring and it may be related<br>to an AC issue you may be able to get some technical help and advice<br>from an engineer at one of the TVSS manufacturers such as Total<br>Protection Solutions, Richmond, VA 800.647.1911 or Surge Suppression<br>Incorporated, Destin, FL 888.987.8877. I would also recommend<br>reaching out for an application engineer in the SPD division at Eaton.<br>Eaton Technical Resource Center 800.809.2772. SSI also has a very<br>experienced field troubleshooting technician they send all around the<br>country to help contractors with difficult electrical issues... Of<br>course that would probably cost $1000-$2000 per day.<br><br>I avoid using piercing taps and connectors. I prefer to use service<br>entrance tap boxes, insulated multi port connectors, or line side<br>rated power distribution blocks. I cannot help but wonder if there<br>may be an actual arc event occurring at one or more of the piercing<br>taps which is somehow picked up by the DC AFCI. In commissioning this<br>system it would be a good idea to use a non-contact IR thermometer<br>and/or thermal imaging camera/scope to check the piercing taps for<br>excessive heating while the conductors are energized and carrying peak<br>currents.<br><br>I hope you are successful in resolving this issue soon. I will<br>continue to follow the thread. Hopefully we can all learn something<br>from this.<br><br>Best regards,<br><br>----MATT<br><br>Matthew Sirum<br>P.O. Box 1227<br>Greenfield, MA 01302-1227 USA<br>phone: +1.413.773.0611<br>email: MatthewSirum@gmail.com<br>_______________________________________________<br>List sponsored by Redwood Alliance<br><br>List Address: RE-wrenches@lists.re-wrenches.org<br><br>Change listserver email address & settings:<br>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org<br><br>List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html<br><br>List rules & etiquette:<br>www.re-wrenches.org/etiquette.htm<br><br>Check out or update participant bios:<br>www.members.re-wrenches.org<br><br></body></html>