<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:12pt"><div><span>Check the specs on the buss rating for that 200 amp panel. A lot of the 200 amp panels actually have a 225 amp rated buss....</span></div><div> </div><div><span style="font-family: tahoma, 'new york', times, serif; ">Max Balchowsky</span><br style="font-family: tahoma, 'new york', times, serif; "><span style="font-family: tahoma, 'new york', times, serif; ">Design Engineer</span><br style="font-family: tahoma, 'new york', times, serif; "><span style="font-family: tahoma, 'new york', times, serif; ">SEE Systems</span><br style="font-family: tahoma, 'new york', times, serif; "><span style="font-family: tahoma, 'new york', times, serif; ">1048 Irvine Ave Suite 217</span><br style="font-family: tahoma, 'new york', times, serif; "><span style="font-family: tahoma, 'new york', times, serif; ">Newport Beach, Ca. 92660</span><br
style="font-family: tahoma, 'new york', times, serif; "><span style="font-family: tahoma, 'new york', times, serif; ">760-403-6810</span><span style="font-family: tahoma, 'new york', times, serif; "></span><br></div><div style="font-size: 12pt; font-family: arial, helvetica, sans-serif; "><div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "><font size="2" face="Arial"><hr size="1"><b><span style="font-weight:bold;">From:</span></b> Jason Szumlanski <Jason@fafcosolar.com><br><b><span style="font-weight: bold;">To:</span></b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b><span style="font-weight: bold;">Sent:</span></b> Thursday, September 29, 2011 8:48 AM<br><b><span style="font-weight: bold;">Subject:</span></b> [RE-wrenches] Adding on to existing PV System<br></font><br><meta http-equiv="x-dns-prefetch-control" content="off"><div id="yiv1130304070"><style><!--
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--></style><div class="yiv1130304070WordSection1"><div class="yiv1130304070MsoNormal">We’ve been contracted to add on to an existing PV system in a residence. The existing system has a 30A 2P Breaker on a 200A rated panel with a 200A main breaker. The new system would require a 15A breaker, which would exceed the limit in NEC 690.64(B)(2).</div><div class="yiv1130304070MsoNormal"> </div><div class="yiv1130304070MsoNormal">The existing system has a fusible AC disconnect mounted next to the meter. This was originally intended as the utility external disconnect. The utility no longer requires a disconnect, but if we do a supply side connection, we would need a fusible AC disconnect anyway for the new system. I would collocate the new disconnect with the old.</div><div class="yiv1130304070MsoNormal"> </div><div class="yiv1130304070MsoNormal">Does anyone see any problem with doing a supply size connection for the new system? Any labeling snags
that I might need to consider?</div><div class="yiv1130304070MsoNormal"> </div><div class="yiv1130304070MsoNormal"><span style="font-size:12.0pt;">Jason Szumlanski</span></div><div class="yiv1130304070MsoNormal">Fafco Solar</div></div></div><meta http-equiv="x-dns-prefetch-control" content="on"><br>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a ymailto="mailto:RE-wrenches@lists.re-wrenches.org" href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & 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://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br><br>List rules &
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