<div dir="ltr">Hi Wayne,<div><br></div><div>I think they are simply asking for the amp rating of the bussing (usually available on the service panel sticker, or in spec sheet), and the amp rating of the main breaker. You will need to show that you can comply with the 120% rule for a load side connection.</div><div><br></div><div>Thanks</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Nov 30, 2014 at 7:29 PM, Allan Sindelar <span dir="ltr"><<a href="mailto:allan@sindelarsolar.com" target="_blank">allan@sindelarsolar.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="background-color:rgb(255,255,255);color:rgb(0,0,0)" bgcolor="#FFFFFF" text="#000000">
<div>Wayne,<br>
I don't think that you are correct. The bus rating of a 200A
service panel may or may not be 200A, but it's not simply 120% of
the panel's rating.<br>
<br>
The original 120% rule was premised on the fact that in
residential applications, panelboards (and thus busbars) were
seldom if ever run at full ampacity, and thus a 20% "negative
load" of a PV system was unlikely to ever cause overloading and
overheating of the busbar. You'll note that this was originally
allowed only in residential applications; commercial buildings
were expected to likely run at or near capacity.<br>
<br>
I think you'll need to get the actual busbar rating from the
manufacturer.<br>
Allan<span class="HOEnZb"><font color="#888888"><br>
<br>
<div>
<div>
<p class="MsoNormal"><b>Allan Sindelar</b><br>
<span style="font-size:10.0pt"><a href="mailto:allan@sindelarsolar.com" target="_blank">allan@sindelarsolar.com</a></span><br>
<span style="font-size:10.0pt">NABCEP Certified PV
Installation Professional<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder (Retired), <span>Positive Energy,
Inc.</span><br>
<b><a href="tel:505%20780-2738" value="+15057802738" target="_blank">505 780-2738</a> cell</b><br>
<br>
<b><u></u><u></u></b></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
</div></font></span><div><div class="h5">
On 11/30/2014 4:45 PM, Wayne Irwin wrote:<br>
</div></div></div>
<blockquote type="cite"><div><div class="h5">
<div dir="ltr"><font style="font-size:12pt" color="#000000" size="3">Hello Wrenches, <br>
<br>
Hope you all had a nice Thanksgiving.<br>
<br>
I have an AHJ asking for the service panel buss rating and the
service panel buss protection rating.<br>
<br>
Am I correct to assume that the rating is the service panels
designated rating x 1.2% (ie 200A x 1.2 = 240)?<br>
and that the buss protection is the combined input breakers?
200 Main breaker + 40A solar back feed = 240A?<br>
</font><br>
<font style="font-size:12pt" color="#000000" size="3"><font style="font-size:12pt" color="#000000" size="3">Given that
there are many different size panels (150A and 200A) that
share the same bus, I have a difficult time believing this
to be true.<br>
<br>
</font>If there is any designated signage or data sheets
specific to the service panel, where might I find this?<br>
I have looked at Schnider but have not been able to find
anything specific.<br>
<br>
Thanks,<br>
</font><br>
<br>
<font style="font-size:12pt" color="#008A17" size="3">Wayne
Irwin</font><font style="font-size:12pt" color="#008A17" size="3">,</font><font style="font-size:12pt" color="#008A17" size="3"><br>
</font><font style="font-size:12pt" color="#008A17" size="3">President</font><font style="font-size:12pt" color="#008A17" size="3"><br>
</font><font style="font-size:12pt" color="#008A17" size="3">License
#CVC56695 </font><font style="font-size:12pt" color="#008A17" size="3"><br>
</font><font style="font-size:12pt" color="#008A17" size="3">State
Licensed Solar Contractor</font><font style="font-size:12pt" color="#008A17" size="3"><br>
</font><font style="font-size:12pt" color="#008A17" size="3">Pure
Energy Solar International Inc. </font><font style="font-size:12pt" color="#008A17" size="3"><br>
</font><font style="font-size:12pt" color="#008A17" size="3">
</font><font style="font-size:12pt" color="#008A17" size="3"><a href="mailto:PureEnergySolar@hotmail.com" target="_blank">Wayne@PureEnergySolar.com</a></font><font style="font-size:12pt" color="#008A17" size="3"> </font><font style="font-size:12pt" color="#008A17" size="3"><br>
</font><font style="font-size:12pt" color="#008A17" size="3">
</font><font style="font-size:12pt" color="#008A17" size="3"><a href="http://PureEnergySolar.com" target="_blank">http://PureEnergySolar.com</a><br>
<a href="https://solarchargingstation.net" target="_blank">http://SolarChargingStation.net</a><br>
</font><font style="font-size:12pt" color="#008A17" size="3">352
377-6527 Office</font><font style="font-size:12pt" color="#008A17" size="3"><br>
</font><font style="font-size:12pt" color="#008A17" size="3">352
336-3299 Fax</font><font style="font-size:12pt" color="#008A17" size="3"><br>
</font><font style="font-size:12pt" color="#008A17" size="3">352
316-1637 Cell</font><font style="font-size:12pt" color="#008A17" size="3"><br>
</font><font style="font-size:12pt" color="#008A17" size="3"><br>
<font style="font-size:12pt" face="Comic Sans MS">The Sun Is
Always Shining!</font><font face="Arial"><br>
<br>
</font></font>
<p><font style="font-size:12pt" color="#008A17" face="Arial" size="3">The
content of this message is Pure Energy Solar Confidential.
If you are not the intended
recipient and have received this message in error, any use
or distribution is
prohibited. Please notify me immediately by reply e-mail and
delete this
message from your computer system. Thank you.</font></p>
</div>
<br>
<fieldset></fieldset>
<br>
</div></div><span class=""><pre>_______________________________________________
List sponsored by Redwood Alliance
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a>
Change listserver email address & settings:
<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>
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>
List rules & etiquette:
<a href="http://www.re-wrenches.org/etiquette.htm" target="_blank">www.re-wrenches.org/etiquette.htm</a>
Check out or update participant bios:
<a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a>
</pre>
</span></blockquote>
<br>
</div>
<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><br>
<br>
<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div><br></div><div><font color="#305A78" face="'times new roman', serif"><br></font></div><div><br></div>Mac Lewis<br><br><span style="font-family:'Times New Roman';font-size:medium;color:rgb(255,153,0)"><b><font face="Arial, Helvetica, sans-serif" size="3"><p align="left"><font color="#000000" face="Verdana, Arial, Helvetica, sans-serif"><span style="font-size:small"><span style="font-family:arial;font-weight:normal;color:rgb(48,90,120)"><font face="'times new roman', serif">"Yo solo sé que no sé nada." </font><span style="font-weight:700;color:rgb(104,104,104)"><font face="'times new roman', serif">-Sócrates</font></span></span></span></font></p></font></b></span></div>
</div>