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--></style></head><body lang="EN-US" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Hi William,</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Check out NEC 314.16(C)(2):</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span></p><p class="MsoNormal"><img width="287" height="232" style="width:2.9895in;height:2.4166in" id="Picture_x0020_1" src="cid:image001.png@01D2BFEB.E72A1400"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">I don’t know per se about putting fuses in conduit bodies, but the code allows for some limited splices, taps, or devices in conduit bodies.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">August</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span></p><div><div style="border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>William Miller<br><b>Sent:</b> Thursday, April 27, 2017 7:41 PM<br><b>To:</b> RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br><b>Subject:</b> Re: [RE-wrenches] Third Radian ---> Class T Fuse With/Without Fuse Holder</span></p></div></div><p class="MsoNormal"> </p><div><p class="MsoNormal">Jerry:</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">I thought splices or connections were forbade in condulettes. This sounds inherently code non-compliant. Do you have information to the contrary?</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">William</p></div><div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>On Apr 27, 2017, at 4:41 PM, Jerry Shafer <<a href="mailto:jerrysgarage01@gmail.com">jerrysgarage01@gmail.com</a>> wrote:</p></div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><div><div><p class="MsoNormal">Wrenches</p></div><div><p class="MsoNormal">In the event you or some else installed a Class T fuse and you want to protect it a little more from cable stress, installing it inside a PVC C conduit body and cover and fastening the cables to the fuse inside that, this will protect the fuse from stress and metallic contact and you can put a label on it stating size and type. </p></div><div><p class="MsoNormal">Jerry</p></div></div><div><p class="MsoNormal"> </p><div><p class="MsoNormal">On Wed, Apr 26, 2017 at 6:05 PM, Matthew Sirum <<a href="mailto:matthewsirum@gmail.com" target="_blank">matthewsirum@gmail.com</a>> wrote:</p><blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in"><p class="MsoNormal" style="margin-bottom:12.0pt">Greetings William,<br><br>Good point. This is something I always take into consideration. I<br>have used Class T Fuses in many situations with and without their fuse<br>holders. In the case of the installation shown in my custom DC Bus<br>System pictures the wire/cable type and wire management avoid putting<br>too much physical stress on the Class T Fuses. The #4 AWG conductors<br>are supported from above and apply very little stress on the fuses<br>they connect to. The 4/0 AWG cabling is Cobra X-Flex (fine stand,<br>very flexible) and each of these conductors is secured a few inches<br>from where they connect to their fuses. Care was taken in making up<br>these connection and they were all carefully adjusted and inspected to<br>ensure they would not stress the fuses. I feel really good about how<br>it all came together. The same care and attention will be needed<br>whenever these connections are serviced and the fasteners are<br>torqued/tightened. When well planned and carefully assembled I do not<br>have concern there will be any issues related to not using the fuse<br>holder. I also think about this another way as well... Using the<br>Class T Fuse Holder adds another 2 connections to the circuit. I try<br>to remind myself that more connections can equal more chance of<br>issues... Although, if a manufacturer of a Class T Fuse states the<br>fuse holder must be used with their fuse there could be an NEC<br>violation by not using it.<br><br>One thing to note about the use of these fuses in this installation is<br>that they are supplemental over current protection (OCP). Each<br>positive (ungrounded) conductor connecting to this DC Bus System has a<br>means of primary over current protection and disconnect on its<br>opposite end. The battery systems, the charge controllers, and the<br>inverter/chargers all have circuit breaker disconnects on their<br>respective positive circuit conductors connecting to this DC Bus<br>System. I have seen other folks build without having the needed<br>appropriate means of disconnect and OCP; although most folk are<br>probably more likely to include the primary OCP, but not consider the<br>supplemental OCP. The supplemental OCP (Class T Fuses) provide<br>protection in the event of a fault or short in a circuit between the<br>Bus System and the other OCP at the other equipment.<br><br>Like many folks I have installed and worked on battery systems where<br>we install a Class T Fuse directly onto the positive terminal of the<br>battery bank or via some form of busbar or connector etc. In these<br>cases not only do we need to take care not to stress the fuse, but the<br>fuse itself (and added busbar/connector etc) can act like a lever and<br>along with the mating cable lug(s) create too much stress on the<br>battery terminal... Potentially damaging the terminal, the inner<br>battery connection to the terminal, and/or the seal between the<br>battery case and the terminal. Carelessly tightening the<br>hardware/fasteners to assemble these items to the battery terminal is<br>a common way of inflicting damage on the battery as well. I know I<br>have been involved in some service situations where there was more<br>stress on the Class T Fuse than I would like to see, but as best I<br>know there have not been any fuse failures because of it.<br><br>Thanks for bringing up this question!<br><br>Best regards,<br><br>----MATT<br><br>Matthew Sirum<br>P.O. Box 1227<br>Greenfield, MA 01302-1227 USA<br>phone: <a href="tel:%2B1.413.773.0611">+1.413.773.0611</a><br>email: <a href="mailto:MatthewSirum@gmail.com">MatthewSirum@gmail.com</a><br><br><br>-------- Original Message Below --------<br><br>[RE-wrenches] Third Radian<br><br>William Miller william at <a href="http://millersolar.com" target="_blank">millersolar.com</a><br>Tue Apr 25 23:03:03 PDT 2017<br><br>Matt:<br><br>I have a question for you: I have often considered mounting Class T fuses<br>directly to a bus bar as you have done. Are you ever worried about physical<br>strain on the fuse itself without a fuse holder?<br><br>Thanks again for all of your input.<br><br>William Miller<br><br>Lic 773985<br><a href="http://millersolar.com" target="_blank">millersolar.com</a><br><a href="tel:805-438-5600">805-438-5600</a><br>_______________________________________________<br>List sponsored by Redwood Alliance<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Change listserver email address & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: <a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" target="_blank">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm" target="_blank">www.re-wrenches.org/etiquette.htm</a><br><br>Check out or update participant bios:<br><a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a></p></blockquote></div><p class="MsoNormal"> </p></div></div></blockquote><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><p class="MsoNormal" style="margin-bottom:12.0pt">_______________________________________________<br>List sponsored by Redwood Alliance<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Change listserver email address & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: <a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><br><br>Check out or update participant bios:<br><a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a></p></div></blockquote></div></body></html>