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Mick,<br>
-2 means 90 degrees C rather than 75. THWN-2 thus means that it is
wet-rated at 90C. That is generally considered Code for arrays,
such as if it is run in NM flex conduit to a traditional module
j-box. The j-box area may be considered to be able to get hot enough
to require 90C rated wire. Nowadays with MC-type module leads,
combiner boxes aren't subject to the same high temperatures on the
THWN as when they terminate in module j-boxes, and the higher
temperature rating isn't generally necessary.<br>
<br>
Much of what I'm saying here is older John Wiles stuff.<br>
Allan<br>
<br>
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<p class="MsoNormal" style=""><span class="il"><b style="">Allan</b></span><b
style=""> Sindelar</b><span style="font-size: 10pt;"><br>
<a href="mailto:Allan@positiveenergysolar.com"
target="_blank"><span class="il">Allan</span>@positiveenergysolar.com</a><br>
NABCEP Certified Photovoltaic Installer<br>
EE98J Journeyman Electrician<br>
<b style="">Positive Energy, Inc.</b><br>
3201 Calle Marie<br>
Santa Fe, New Mexico 87507<br>
<b style="">505 424-1112</b><br>
<a href="http://www.positiveenergysolar.com/"
target="_blank">www.positiveenergysolar.com</a></span></p>
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<br>
On 7/23/2010 10:52 AM, Mick Abraham wrote:
<blockquote
cite="mid:AANLkTikavaO8X-HxTQpQZ5_KO4fnOk6DOeo1Ekm_57TA@mail.gmail.com"
type="cite"><span class="Apple-style-span" style="font-family:
arial,sans-serif; font-size: 12.5px; border-collapse: collapse;">
<div>I'm sorry to broadcast my ignorance, but:</div>
<div><br>
</div>
<div>Could someone explain to me the significance of the -2
marking? Reply off-list if you wish to save bandwidth...but
other List members may also be wondering... </div>
<div><br>
</div>
<div>Thanks, </div>
<div><br>
</div>
</span>Mick Abraham, Proprietor<br>
<a moz-do-not-send="true" href="http://www.abrahamsolar.com">www.abrahamsolar.com</a><br>
<br>
Voice: 970-731-4675<br>
<br>
<br>
<div class="gmail_quote">On Fri, Jul 23, 2010 at 10:48 AM, Nick
Soleil <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:nicksoleilsolar@yahoo.com">nicksoleilsolar@yahoo.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
<div bgcolor="#FFFFFF">
<div>I have specified THWN-2 for years, but occasionally
will not be able to source it!<br>
<br>
Sent from my iPhone</div>
<div>
<div class="h5">
<div><br>
On Jul 23, 2010, at 11:37 AM, "Peter Parrish" <<a
moz-do-not-send="true"
href="mailto:peter.parrish@calsolareng.com"
target="_blank">peter.parrish@calsolareng.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div>
<div>
<p class="MsoNormal"><font color="navy"
face="Arial" size="2"><span style="font-size:
10pt; font-family: Arial; color: navy;">We
went through a similar problem with
some beach communities here in SoCal.
Because of the high humidity (all winter
and summer mornings) they wanted THWN-2 for
all conduit runs (as well as PVC
instead of EMT). At first we were charged a
premium for THWN-2 compared to
THHN. But then we found a source at All
Phase Electrical Supply Burbank CA (a part
of CED) for THWN-2 #10 stranded @
$162.40/k-ft. Brand is <span>En(</span>m?)<span>core</span>
Wire. THWN-2 listing is printed on the
insulation.</span></font></p>
<p class="MsoNormal"><font color="navy"
face="Arial" size="2"><span style="font-size:
10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy"
face="Arial" size="2"><span style="font-size:
10pt; font-family: Arial; color: navy;">-
Peter</span></font></p>
<p class="MsoNormal"><font color="navy"
face="Arial" size="2"><span style="font-size:
10pt; font-family: Arial; color: navy;"> </span></font></p>
<div>
<p class="MsoNormal"><font color="navy"
face="Arial" size="2"><span
style="font-size: 10pt; font-family:
Arial; color: navy;">Peter T. Parrish,
Ph.D., President<br>
California
Solar Engineering, Inc.<br>
820 Cynthia Ave., Los Angeles, CA 90065<br>
CA Lic. 854779, NABCEP Cert. 031806-26<br>
<a moz-do-not-send="true"
href="mailto:peter.parrish@calsolareng.com"
target="_blank">peter.parrish@calsolareng.com</a><span>
</span><br>
Ph 323-258-8883, Mobile
323-839-6108, Fax 323-258-8885</span></font><font
color="navy"><span style="color: navy;"><span>
</span><span> </span></span></font></p>
<p><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt;"> </span></font><font
color="black" face="Times New Roman"
size="3"><span style="font-size: 12pt;
font-family: "Times New Roman";
color: windowtext;"></span></font></p>
</div>
<p class="MsoNormal"><font face="Times New Roman"
size="3"><span style="font-size: 12pt;"> </span></font></p>
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</blockquote>
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<blockquote type="cite">
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