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<DIV dir=ltr align=left><SPAN class=296140917-31072009><FONT color=#0000ff
size=2 face=Arial>See Article 220 for load calculation and resulting breaker
sizing requirments.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=296140917-31072009></SPAN> <BR><SPAN
lang=en-us><FONT size=2 face=Arial>Mark Frye</FONT></SPAN> <BR><SPAN
lang=en-us><FONT size=2 face=Arial>Berkeley Solar Electric Systems</FONT></SPAN>
<BR><SPAN lang=en-us><FONT size=2 face=Arial>303 Redbud Way</FONT></SPAN>
<BR><SPAN lang=en-us><FONT size=2 face=Arial>Nevada City, CA
95959</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2 face=Arial>(530)
401-8024</FONT></SPAN> <BR><SPAN lang=en-us></SPAN><A
href="http://www.berkeleysolar.com/"><SPAN lang=en-us><U><FONT color=#0000ff
size=2 face=Arial>www.berkeleysolar.com</FONT></U></SPAN></A><SPAN
lang=en-us><FONT size=2 face=Arial> </FONT></SPAN> </DIV>
<DIV> </DIV><BR>
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<FONT size=2 face=Tahoma><B>From:</B> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <B>On Behalf Of </B>Mendocino
Solar Service<BR><B>Sent:</B> Friday, July 31, 2009 9:57 AM<BR><B>To:</B>
RE-wrenches<BR><B>Subject:</B> [RE-wrenches] down-sizing main
breaker<BR></FONT><BR></DIV>
<DIV></DIV>Hi Folks,
<DIV><BR></DIV>
<DIV>Can anyone provide code reference or advice on this question?</DIV>
<DIV>Our customer has 100 amp service at the meter pedestal, 100 amp main
breaker feeding 200 foot underground run to a 100 amp panel at the house. We
need to land a 40 amp breaker, so are proposing to replace main panel at house
with 200 amp panel. The AHJ says we need a 200 amp main breaker in this panel,
which will work, but says this requires upsizing the feeder, main breaker at
meter, and therefore utility service to 200 amps.</DIV>
<DIV><BR></DIV>
<DIV>I've read on this list and elsewhere about downsizing the main breaker in a
panel to create capacity to make the 120% rule. This AHJ says you can't put in a
breaker smaller than the panel size, and furthermore, everything upstream would
have to be upsized. Is this from the code?<BR><BR>
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<DIV>Bruce Erickson</DIV>
<DIV>Mendocino Solar Service</DIV>
<DIV>PO Box 1252</DIV>
<DIV>Mendocino, CA 95460</DIV>
<DIV>707-937-1701</DIV>
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