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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Drake,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>They will not let you eliminate the box with the main breaker since
the conductors are run through the building. You are back to a load side
connection. However, since there are no loads pulled off that conductor to the
residential panel before the panel, connecting to the line side of the
residential panel makes it impossible to overcurrent the conductor. Most
inspectors will accept this method. The PV system will have to have a fused
disconnect at least as large as 125% of the sum of the full-current ratings for
the group of inverters, but it could be up to the ampacity of the wire (I
believe you said this was a 200-amp service). <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>As long as you are feeding the service conductor from the
opposite end as the supply breaker, and there are no loads taken off that supply
conductor until the residential panel, you can make the argument that the sum
of the supply breakers is only 200-amps. That is because there is a 200-amp
breaker at one end, and a 200-amp breaker (PV) at the other end (the conductor
only can be supplied by 200-amps in either direction). In any fault analysis scenario
you can conjure up, there is no way to overcurrent the conductor. Even a dead
short in the wire can only carry 200-amps from each direction—that is acceptable
in standard fault analysis because the current flow at the fault is
disregarded. You have met the requirements of 690.64 (B). <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If you put it in the residential panel, you must comply with the
120% rule--for now.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Bill.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<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-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Drake
Chamberlin<br>
<b>Sent:</b> Thursday, July 31, 2008 7:53 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] Gray code area<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Bill,<br>
<br>
That is a great point. As it stands, the box ahead of the residence does
contain a main breaker. If we get rid of that breaker and turn it into a
lugs only panel, it would satisfy the requirements. I wonder how that
would pan out, since the wiring runs through this other building. <br>
<br>
Thanks,<br>
<br>
Drake <br>
<br>
<br>
At 12:49 PM 7/31/2008, you wrote:<br>
<br>
<o:p></o:p></p>
<p class=MsoNormal>Content-Type: multipart/alternative;<br>
boundary="----=_NextPart_000_006F_01C8F303.83492700"<br>
Content-Language: en-us<br>
<br>
Drake,<br>
<br>
690.64 relates everything to the service disconnects. All the rest of this is
semantics. As long as the PV connection is upstream of the service disconnect
(i.e. in between the service disconnect and the service meter), it is
considered a line side service connection.<br>
<br>
If there is no way to turn off the residential service in the panel with the
“feed-thru” lugs, there is no service disconnect for the
residential service yet. That way if the connection were on the line side of
the first service disconnect for the residence (one of two services at the
site, both coming from the same service dropto get all the semantics
proper), it is considered a line-side connection. So what is it….?<br>
<br>
Bill.<br>
<br>
<b>From:</b> re-wrenches-bounces@lists.re-wrenches.org [<a
href="mailto:re-wrenches-bounces@lists.re-wrenches.org">
mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Drake
Chamberlin<br>
<b>Sent:</b> Thursday, July 31, 2008 9:13 AM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] Gray code area<br>
<br>
At 03:24 PM 7/30/2008, you wrote:<br>
<br>
According to the two paragraphs above, the commercial building has two
commercial services??? One will receive PV and one will not??<br>
<br>
One service is for the commercial building and one is for the residence.
There is one service drop to two meters. Both services will be fed PV. <br>
<br>
<br>
Drake Chamberlin<br>
Athens Electric<br>
OH License 44810<br>
CO License 3773<br>
740-448-7328<br>
303-328-5533<br>
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<p>Drake Chamberlin<br>
Athens Electric<br>
OH License 44810<br>
CO License 3773<br>
740-448-7328<br>
303-328-5533<o:p></o:p></p>
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