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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Arial Black","sans-serif";color:black'>Don’t we have to use the more restrictive one?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Arial Black","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Arial Black","sans-serif";color:black'>Bob Ellison<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Arial Black","sans-serif";color:black'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>William Miller<br><b>Sent:</b> Wednesday, January 22, 2014 7:32 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> [RE-wrenches] Temperature Compensation calcs for wire<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Friends:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I try to be rigorous in application of NEC codes to everything I do, including wire sizing. I understand that even though I am using conductors rated at 90°C, the breakers I use have terminals rated at 75°C so when deriving the values for ampacity for a given gauge from the tables, I have to use the 75°C column.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>What is not clear, however, is which column I use when applying temperature derating. Table 315(B)(2)(b) has a column for 75 and a column for 90. I am using 90° wire. The values for 90° are much more generous than the 75° values and I would like to use them. Which is correct?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>As always, thanks to everyone on this list for all of the help and advice.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>William<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><img width=140 height=61 id="Picture_x0020_1" src="cid:image001.jpg@01CF17AC.8D4692A0" alt="Gradient Cap"><o:p></o:p></p><p class=MsoNormal>Lic 773985<o:p></o:p></p><p class=MsoNormal><a href="http://www.millersolar.com/">millersolar.com</a><o:p></o:p></p><p class=MsoNormal>805-438-5600<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><hr size=1 width="100%" noshade style='color:#ACA899' align=center></span></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>No virus found in this message.<br>Checked by AVG - <a href="http://www.avg.com">www.avg.com</a><br>Version: 2014.0.4259 / Virus Database: 3681/7023 - Release Date: 01/21/14<o:p></o:p></span></p></div><hr noshade="noshade" size="1"><a></a><p class=""avgcert"" align="left" color="#000000">No virus found in this message.<br>
Checked by AVG - <a href='http://www.avg.com'>www.avg.com</a><br>
Version: 2014.0.4259 / Virus Database: 3681/7023 - Release Date: 01/21/14</p></body></html>