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<TITLE>Re: [RE-wrenches] #10 THWN-2</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Mick,<BR>
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THWN-2 is 90°C rated per Table 310.16. This is key for conductors in conduit on a roof. On a roof in full sun ambient temperatures are such that a 75°C rated conductor will have a severely diminished allowable ampacity, if any allowable ampacity.<BR>
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Jollily,<BR>
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David<BR>
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On 7/23/10 11:52 AM, "Mick Abraham" <<a href="mick@abrahamsolar.com">mick@abrahamsolar.com</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT SIZE="1"><FONT FACE="Arial"><SPAN STYLE='font-size:9pt'>I'm sorry to broadcast my ignorance, but:<BR>
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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... <BR>
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Thanks, <BR>
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</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Mick Abraham, Proprietor<BR>
www.abrahamsolar.com <<a href="http://www.abrahamsolar.com">http://www.abrahamsolar.com</a>> <BR>
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Voice: 970-731-4675<BR>
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On Fri, Jul 23, 2010 at 10:48 AM, Nick Soleil <<a href="nicksoleilsolar@yahoo.com">nicksoleilsolar@yahoo.com</a>> wrote:<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>I have specified THWN-2 for years, but occasionally will not be able to source it!<BR>
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Sent from my iPhone<BR>
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On Jul 23, 2010, at 11:37 AM, "Peter Parrish" <<a href="peter.parrish@calsolareng.com">peter.parrish@calsolareng.com</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT COLOR="#000080"><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10pt'>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 En(m?)core Wire. THWN-2 listing is printed on the insulation.<BR>
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- Peter<BR>
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</SPAN></FONT></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT COLOR="#000080"><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10pt'>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 href="mailto:peter.parrish@calsolareng.com">mailto:peter.parrish@calsolareng.com</a>> <a href="peter.parrish@calsolareng.com">peter.parrish@calsolareng.com</a> <BR>
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> <BR>
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