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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";color:#1f497d">Incidentally, it looks like someone doubled up on the neutrals to the neutral lugs/terminals. Those lugs may not be listed for multiple conductors, but it may be worth checking if you are indeed inspecting this system. We use a c-taps (and sometimes h-taps for copper to aluminum) to fix up grounding when terminals have limited spaces. </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-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><a href="https://www.burndy.com/solutions/compression-terminals/copper-taps">https://www.burndy.com/solutions/compression-terminals/copper-taps</a></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-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">August</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-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"><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">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Rebekah Hren<br><b>Sent:</b> Thursday, December 29, 2016 2:40 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> [RE-wrenches] Grounding/bonding question for 200A main breaker service disconnect</span></p></div><p class="MsoNormal"> </p><div><p class="MsoNormal">Hi Wrenches, </p><div><p class="MsoNormal">Is anyone familiar with the type of main disconnect shown in this picture? I need to figure out if the GEC is bonded to the box or not. A supply side connection has been made in the box, and the only grounding for the PV system is via the green EGC on the new terminal strip. I am inspecting this as a third party, and did not perform the installation. </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">I cannot tell if the GEC (the bare copper) is bonded to the box via the (apparently) isolated terminal where the neutral and main panel EGC (the bare aluminum) are landed. </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">The green wire on the grounding terminal at the bottom left is the EGC running to the supply-side connected PV system AC fused disconnect, but the PV system will not actually be grounded (um, <b>at all</b>) unless the GEC is bonded to the box through that black plastic neutral block, which appears to be isolated with cardboard. There is no other connection to physical earth except the bare copper GEC. </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Checked with the meter and got continuity from the green to bare wire, but that could be because the bare aluminum EGC is touching the box in multiple places.</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">It may be that the GEC is bonded via a back-mounted screw to the box, but I just can't tell what's going on with this design or what is supposed to be happening. That tab to the right of the bare copper GEC does not actually touch the terminal above it as you can see from the second picture, unless it is a connection in the plastic. </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"><img border="0" width="365" height="487" id="_x0000_i1025" src="cid:image002.jpg@01D261E9.A1F4E0A0" alt="Inline image 1">. </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"><img border="0" width="301" height="505" id="_x0000_i1026" src="cid:image004.png@01D261E9.A1F4E0A0" alt="Inline image 3"></p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal" style="margin-bottom:12.0pt">Thanks for any insight!</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Rebekah<br clear="all"></p><div><p class="MsoNormal"> </p></div><p class="MsoNormal">-- </p><div><div><p class="MsoNormal">Tel: 336.266.8800<br>NABCEP Certified Solar PV Installation Professional™ 091209-85<br>NC Licensed Electrical Contractor</p></div></div></div></div></div></body></html>