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<div class="moz-cite-prefix"><font size="+1">JASON:<br>
<br>
<font size="+1">The reference temperature fo<font size="+1">r
the Square-D breakers is 40C/104F, as opposed to 20C/68F</font></font>
for the ABB breakers. The possibility of a "nuisance trip" due
to derating w<font size="+1">ould occur sooner for</font> a 20A
ABB breaker than for a 20A QO/QOB breaker.<br>
<br>
<font size="+1">I received a follow-up e-mail earlier today from
Steve Capozzi of SolaDeck:</font></font><br>
<blockquote>-------- Original Message --------
</blockquote>
<blockquote>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">Subject:
</th>
<td>RE: SolaDeck</td>
</tr>
<tr>
<th nowrap="nowrap" valign="BASELINE" align="RIGHT">Date:
</th>
<td>Tue, 27 Nov 2012 07:20:17 -0600</td>
</tr>
<tr>
<th nowrap="nowrap" valign="BASELINE" align="RIGHT">From:
</th>
<td>Steve Capozzi <a class="moz-txt-link-rfc2396E" href="mailto:scapozzi@rstcenterprises.com"><scapozzi@rstcenterprises.com></a></td>
</tr>
<tr>
<th nowrap="nowrap" valign="BASELINE" align="RIGHT">Organization:
</th>
<td>RSTC Enterprises</td>
</tr>
<tr>
<th nowrap="nowrap" valign="BASELINE" align="RIGHT">To: </th>
<td><a class="moz-txt-link-rfc2396E" href="mailto:gary@icarus-engineering.com"><gary@icarus-engineering.com></a></td>
</tr>
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<br>
Gary,<br>
<br>
I sent ABB engineering an e-mail yesterday to see if they have
any new items with higher ambient temps.<br>
<br>
The breakers we have were the highest at the time we started
into AC systems.<br>
<br>
We have never had a issue in the field with these breakers.<br>
<br>
I will keep you posted.<br>
<br>
steve<br>
<br>
Steve Capozzi<br>
President<br>
RSTC Enterprises Inc<br>
2214 Heimstead Road<br>
Eau Claire, Wi 54703<br>
866-367-7782<br>
715-830-9997<br>
</blockquote>
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<p class="MsoNormal"><span style="color:#1F497D"><o:p><font
color="#000000"> I'll keep you posted with what I find
out.</font><br>
</o:p></span></p>
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<p style="margin-bottom:0.0001pt;line-height:normal"><font
size="+1" color="#000000"><span>Regards<span>,</span><br>
<br>
<br>
Gary Willett, PE<br>
Icarus Engineering LLC</span></font></p>
<font size="+1"> <font color="#000000"> </font> <font
color="#000000"><span>Icarus Solar Services LLC</span></font></font></div>
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On 11/27/2012 8:30 AM, Jason Szumlanski wrote:<br>
</div>
<blockquote
cite="mid:CAJJtG3ryzYepKSBKGX-YtkqY5iATeyzEVgqDbeeGicMG2OcB4w@mail.gmail.com"
type="cite">We're pretty fortunate that a roof mounted readily
accessible disconnect has not been a sticking point locally. I
would argue that the AC disconnect is still the trunk cable
connector, which can be not readily accessible. The AC breaker
carrying the combined circuit output in the main distribution
panel or the fusible disconnect switch if performing a supply side
connection would qualify as the readily accessible disconnect. If
you install Enphase I'm sure you are familiar with the
manufacturer's excellent white paper on this issue.
<div>
<br>
</div>
<div>I hear what you are saying about the temperature concerns,
but there are many installations that have far fewer than 17
inverters per string. A typical residential installation can be
split into two or three branch circuits (thank you, Andrew, for
keeping me accurate on the string/circuit thing!) The temp
concern is definitely something to explore further. There is
also the thermal interference factor to take into account for
multiple breakers that Gary did not mention. The full datasheet
is here:</div>
<div><br>
</div>
<div><a moz-do-not-send="true"
href="http://www05.abb.com/global/scot/scot209.nsf/veritydisplay/11d7d0032b466358c125712400340107/$file/2CDC002052D0203_UL489.pdf">http://www05.abb.com/global/scot/scot209.nsf/veritydisplay/11d7d0032b466358c125712400340107/$file/2CDC002052D0203_UL489.pdf</a><br>
</div>
<div><br>
</div>
<div>As for the "interior rated" breaker comment, typical AC
branch circuit breakers (i.e. Sq D QO) are mounted in wet
location NEMA 3R boxes all the time on the exterior of a
building. I'm not sure I understand this concern. The
temperature derating curve is also similar for ABB and QO
breakers. QO Datasheet here:</div>
<div><br>
</div>
<div><a moz-do-not-send="true"
href="http://static.schneider-electric.us/docs/Circuit%20Protection/Miniature%20Circuit%20Breakers/QO-QOB%20Circuit%20Breakers/0730CT9801R108.pdf">http://static.schneider-electric.us/docs/Circuit%20Protection/Miniature%20Circuit%20Breakers/QO-QOB%20Circuit%20Breakers/0730CT9801R108.pdf</a><br>
<br>
I definitely want to be 100% sure the SolaDeck and breakers are
appropriately rated before proceeding. Any comments welcomed...<br>
<br>
<div>
<div
style="font-size:13px;font-family:Verdana,Arial,Helvetica,sans-serif">
<div style="margin:0px 0px 8px">
<p style="margin:0px"><span style="color:rgb(128,128,128)"><strong>Jason
Szumlanski</strong><em> </em></span></p>
<p style="margin:0px"><span style="color:rgb(128,128,128)"><em>Fafco
Solar</em></span><br>
</p>
</div>
</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Mon, Nov 26, 2012 at 6:37 PM, Gary
Willett <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:gary@icarussolarservices.com"
target="_blank">gary@icarussolarservices.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<div><font size="+1">JASON:<br>
<br>
I talked to Steve Capozzi of SolaDeck and he sent me
additional info about the circuit breakers:<br>
</font>
<blockquote><font size="+1"><u>Manufacturer</u>: ABB<br>
<br>
<u>Terminal Temp Rating</u>: 75C / 167F<br>
<br>
<u>Reference Temperature</u>: 20C / 68F<br>
<br>
<u>Ambient Temp Derating</u>: <br>
</font>
<blockquote><font size="+1">30C/86F = 18.7A<br>
40C/104F = 17.3A<br>
50C/122F = 15.8A<br>
60C/140F = 14.1A<br>
70C/158F = 12.2A<br>
</font></blockquote>
</blockquote>
<font size="+1"> My concern is that we may be
attempting to use an interior rated AC breaker in a
roof-deck-mounted NEMA3-R enclosure. <br>
<br>
In an Enphase application, with the maximum of 17
inverters per AC Source Circuit, the continuous
current will be 0.9A x 17 x 1.25 = 19.1A. This
exceeds the 30C/86F trip current of 18.7A. <br>
<br>
The interior temperature of the SolaDeck could very
likely approach the 60C/140F trip current of 14.1A.
<br>
<br>
It seems to me that "nuisance trips" could be a high
probability event. <br>
<br>
Does anyone have any field experience using this
Soladeck option for a AC Source Circuit Combiner Box
(SCCB)?<br>
<br>
Another issue, at least in some jurisdictions, is
the requirement for a roof-top AC Disconnect. <br>
<br>
The SolaDeck, when used as an AC SCCB, may not meet
the NEC Article 100 requirements in some
jurisdictions for "readily accessible" because a
tool is required to open it.<br>
<br>
<font color="#000000"> </font> <font
color="#000000"> </font> <font color="#000000">
</font> <font color="#000000"> </font> <font
color="#000000"> </font> </font>
<div>
<p style="margin-bottom:0.0001pt;line-height:normal"><font
size="+1" color="#000000"><span>Regards<span>,</span><br>
<br>
<br>
Gary Willett, PE<br>
Icarus Engineering LLC</span></font></p>
<font size="+1"> <font color="#000000"> </font> <font
color="#000000"><span>Icarus Solar Services LLC</span></font></font>
<div>
<div><br>
<span></span> </div>
</div>
</div>
<div>
<div> On 11/26/2012 2:21 PM, Jason Szumlanski wrote:<br>
</div>
</div>
</div>
<blockquote type="cite">
<div>
<div>I did get some pictures and info from Soladeck.
Here are some links:
<div><br>
</div>
<div>Pics:</div>
<div>
<div><a moz-do-not-send="true"
href="https://docs.google.com/open?id=1BpiL-1SdSNNsj4wPMQrFCLHH7JT2dek_KftSJl06QLqc0yhJ_1t5oij0aEA6"
target="_blank">https://docs.google.com/open?id=1BpiL-1SdSNNsj4wPMQrFCLHH7JT2dek_KftSJl06QLqc0yhJ_1t5oij0aEA6</a></div>
<div><a moz-do-not-send="true"
href="https://docs.google.com/open?id=1cVuhZGeQNHL1IvGvNBa7v93oZyGBvjxCv5yq4AmoyJeDAITxvgMqgECR2yTv"
target="_blank">https://docs.google.com/open?id=1cVuhZGeQNHL1IvGvNBa7v93oZyGBvjxCv5yq4AmoyJeDAITxvgMqgECR2yTv</a></div>
<div><a moz-do-not-send="true"
href="https://docs.google.com/open?id=1umslTplnFyZG1eNCZE-MMi_OqrSeirFCPRBl9mFNZJ2gQkBjM5LEXnaPKy2l"
target="_blank">https://docs.google.com/open?id=1umslTplnFyZG1eNCZE-MMi_OqrSeirFCPRBl9mFNZJ2gQkBjM5LEXnaPKy2l</a></div>
<div>Specs:</div>
<div>
<div><a moz-do-not-send="true"
href="https://docs.google.com/open?id=13KLAuxUHOR9al7-36reDSJJ7IMnqV3ANPnJILPnrj2xcAi0ksRj67ifKIe7R"
target="_blank">https://docs.google.com/open?id=13KLAuxUHOR9al7-36reDSJJ7IMnqV3ANPnJILPnrj2xcAi0ksRj67ifKIe7R</a></div>
<div><a moz-do-not-send="true"
href="https://docs.google.com/open?id=1kvPFcDc1vruS3W_aONlXyIHm1T8-qi4vTpTwGGJ7H0eIwuZ-5e6zrM1CcND5"
target="_blank">https://docs.google.com/open?id=1kvPFcDc1vruS3W_aONlXyIHm1T8-qi4vTpTwGGJ7H0eIwuZ-5e6zrM1CcND5</a></div>
<div><a moz-do-not-send="true"
href="https://docs.google.com/open?id=1lM8FtYl9HiYohru32UA_Gb1tXZKZ5iw-8tnSu1Un6g4vcklLL-DK1qLPMdsB"
target="_blank">https://docs.google.com/open?id=1lM8FtYl9HiYohru32UA_Gb1tXZKZ5iw-8tnSu1Un6g4vcklLL-DK1qLPMdsB</a></div>
</div>
<div><br>
</div>
<div>I was told Soligent can source the
combiners for you (and me).<br>
<br>
<div>
<div
style="font-size:13px;font-family:Verdana,Arial,Helvetica,sans-serif">
<div style="margin:0px 0px 8px">
<p style="margin:0px"><span
style="color:rgb(128,128,128)"><strong>Jason
Szumlanski</strong><em> </em></span></p>
<p style="margin:0px"><span
style="color:rgb(128,128,128)"><em>Fafco
Solar</em></span><a
moz-do-not-send="true"
href="http://www.wisestamp.com/apps/wordpress?utm_source=extension&utm_medium=email&utm_term=wordpress&utm_campaign=apps"
style="font-family:arial,sans-serif;font-size:80%;color:gray;text-decoration:initial"
target="_blank"> </a><span
style="color:gray;font-family:arial,sans-serif;font-size:80%"> </span></p>
</div>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Mon, Nov 26,
2012 at 1:50 PM, Jason Szumlanski <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:jason@fafcosolar.com"
target="_blank">jason@fafcosolar.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">I
just called Soladeck and they are
sending me some more info on
availability. I'll pass it along when I
get it. I didn't realize they made an AC
roof mounted string combiner solution.
That's a huge help for 2 or 3 string
Enphase installations (they make both
combiners).
<div> <br>
</div>
<div>While on the subject, we recently
started using the Enphase cable couple
with Type TC-ER cable to extend
cabling to junction boxes when
necessary... No more wasting trunk
cable connectors! I suppose Type TC-ER
could be used all the way to the main
distribution panel, thereby
eliminating junctions on the roof, but
I haven't looked into the cost/benefit
of that idea.<br>
<div><br>
</div>
<div>
<div>
<div
style="font-size:13px;font-family:Verdana,Arial,Helvetica,sans-serif">
<div style="margin:0px 0px 8px">
<p style="margin:0px"><span
style="color:rgb(128,128,128)"><strong>Jason
Szumlanski</strong></span></p>
<p style="margin:0px"><span
style="color:rgb(128,128,128)"><em>Fafco
Solar</em></span><br>
<br>
</p>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
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</blockquote>
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</blockquote>
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