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Mark,<br>
<br>
It was a 20-kW generator. I don't remember if it was a 100-amp or
200-amp ATS - it wasn't relevant due to the point of connection. Since
the ATS was not service rated, a service-rated disconnect had to
proceed it. That was to great advantage: 1) while connecting the PV
system to the utility side of the ATS, a service side tap wasn't
required. 2) The service disconnect switch had double lugs (not on my
sketch) so there weren't multiple conductor taps. While I only showed
one, this system actually had two non-essential panels: one for the
house and one for the barn.<br>
<br>
Kent Osterberg<br>
Blue Mountain Solar<br>
<br>
<br>
<br>
Mark Frye wrote:
<blockquote cite="mid:66196BD60C17459BA6823477DF918BDC@marksdell"
type="cite">
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<div dir="ltr" align="left"><font color="#0000ff" face="Arial"
size="2"><span class="921145218-27032011">Ken, </span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" face="Arial"
size="2"><span class="921145218-27032011"></span></font> </div>
<div dir="ltr" align="left"><font color="#0000ff" face="Arial"
size="2"><span class="921145218-27032011">In the situation you show in
your drawing, what was the rating of the transfer switch?</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" face="Arial"
size="2"><span class="921145218-27032011"></span></font> <br>
<span lang="en-us"><font face="Arial" size="2">Mark Frye</font></span>
<br>
<span lang="en-us"><font face="Arial" size="2">Berkeley Solar
Electric Systems</font></span> <br>
<span lang="en-us"><font face="Arial" size="2">303 Redbud Way</font></span>
<br>
<span lang="en-us"><font face="Arial" size="2">Nevada City, CA 95959</font></span>
<br>
<span lang="en-us"><font face="Arial" size="2">(530) 401-8024</font></span>
<br>
<span lang="en-us"></span><a moz-do-not-send="true"
href="http://www.berkeleysolar.com/"><span lang="en-us"><u><font
color="#0000ff" face="Arial" size="2">www.berkeleysolar.com</font></u></span></a><span
lang="en-us"><font face="Arial" size="2"> </font></span> </div>
<div> </div>
<br>
<div dir="ltr" class="OutlookMessageHeader" align="left" lang="en-us">
<hr tabindex="-1"><font face="Tahoma" size="2"><b>From:</b>
<a class="moz-txt-link-abbreviated" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>
[<a class="moz-txt-link-freetext" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Kent
Osterberg<br>
<b>Sent:</b> Sunday, March 27, 2011 11:37 AM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] Generator and Enphase<br>
</font><br>
</div>
Larry,<br>
<br>
Situations vary so much that this might not be very useful. But here
you go. The attached sketch shows how we recently connected a customer
that had a backup generator and transfer switch that wasn't service
rated. There were nice gutters existing from the original install so
accessing points to tap conductors wasn't difficult. We could have
connected the inverters to the non-backed upped loads panel instead,
but the utility requires an accessible disconnect by the meter so it
was more convenient to just get into the gutter.<br>
<br>
Kent Osterberg<br>
Blue Mountain Solar
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