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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-family:"Arial","sans-serif";color:#1F497D'>Marco:<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#1F497D'>Once your conductor enters conduit you are no longer required to use PV wire. 690.35D (2011).<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#1F497D'>William<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><img width=64 height=28 id="Picture_x0020_1" src="cid:image002.jpg@01CFEF66.63A00D90" alt="Gradient Cap_mini"><br>Lic 773985<br><a href="http://www.millersolar.com/"><span style='color:blue'>millersolar.com</span></a><br>805-438-5600<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#1F497D'><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 [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Marco Mangelsdorf<br><b>Sent:</b> Thursday, October 23, 2014 9:46 PM<br><b>To:</b> 'RE-wrenches'<br><b>Subject:</b> [RE-wrenches] "PV wire"<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Seems to me that the best practice for TL inverters is to use double-insulated conductors from the array string(s) to the combiner (if used) to the inverter.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>That said, there doesn’t appear to be any written requirement in the NEC to use double-jacketed conductors. So as long at the conductor is duly listed as “PV wire,” it’s OK to use in DC circuits with TL inverters.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>marco<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>HI Marco<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I think there has been a lot of bad/old information about PV vs double insulated wire.<o:p></o:p></p></div><div><p class=MsoNormal>However now it only listed as PV wire.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>690.35 D (3)<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>jay<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>peltz power<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Oct 23, 2014, at 2:29 PM, Marco Mangelsdorf wrote:<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><div><p class=MsoNormal>Yet again this “PV wire” thing rears its head.<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>For our PV systems using transformerless (TL) inverters, our standard practice has been to use double-insulated conductors for all DC circuits coming into the TL inverter(s), which we believe represents the best practice.<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>However, there doesn’t appear to be any requirement stated in the code that states the need to use double-insulated conductors for DC circuits and TL inverters.<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>So I’m thinking, why pay the extra expense for the double-insulated wire when single-insulated wire may suffice.<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>Anyone know of anything written somewhere that requires the use of double-insulated conductors in TL DC circuits?<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>Thanks,<o:p></o:p></p></div><div><p class=MsoNormal>marco<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>