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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:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Phil,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Sorry, the cable is dual rated as MTW / THW.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I don’t follow when you say MTW is not recognized by the NEC:<br>T310.13(A) 2008 NEC<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Moisture-, heat-, and oil-resistant thermoplastic<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>MTW<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> 60C <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>140F<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Machine tool wiring in wet locations<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Flame-retardant moisture-, heat-, and oil-resistant thermoplastic…<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Glenn Burt<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><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>Phil Undercuffler<br><b>Sent:</b> Tuesday, November 30, 2010 1:07 AM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] NEC 690.74<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p>My recollection is that MTW is Machine Tool Wire, which indeed is not recognized by the NEC. It's an "other" category of wire intended to be used by manufacturers as internal wiring on products which they then get listed. So a wire with other ratings (such as USE, RHW, THHN) can also have a MTW rating and be fine, but a wire with only an MTW rating should not be used as field wiring by an installer. <o:p></o:p></p><p>Also, do you have a source for RHW-2 battery cables? Or did you mean to say RHW, such as the typical Cobra X-Flex? <o:p></o:p></p><p>Phil Undercuffler<o:p></o:p></p><div><p class=MsoNormal>On Nov 29, 2010 7:41 PM, "Philip Boutelle" <<a href="mailto:philboutelle@gmail.com">philboutelle@gmail.com</a>> wrote:<br>> Found the thread, very helpful.... thanks Glenn.<br>> The current parallel discussion on Battery Cables REvisited is helpful too.<br>> The inspector (She, btw) is extremely thorough. Although she has asked for<br>> proof of purpose-specific listings on just about everything, it seems I<br>> misquoted her in my previous post; I looked up her earlier plan review<br>> comments, and here's her original quote (from when my plans said to use MTW<br>> for the battery cable): "MTW is not NEC approved for use". I think that to<br>> her, if it isn't explicitly in the NEC then I can't use it (lists go from<br>> being partial & inclusive to complete & limiting).<br>> -Phil<br>> <br>> On Mon, Nov 29, 2010 at 6:03 PM, Glenn Burt <<a href="mailto:glenn.burt@glbcc.com">glenn.burt@glbcc.com</a>> wrote:<br>> <br>>> Hi Phil,<br>>><br>>><br>>><br>>> I posted some information that is relevant back in March of 2009. It should<br>>> be in the searchable archives…<br>>><br>>><br>>><br>>> -Glenn Burt<br>>><br>>><br>>><br>>> *From:* <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a> [mailto:<br>>> <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>] *On Behalf Of *Philip Boutelle<br>>> *Sent:* Monday, November 29, 2010 8:08 PM<br>>> *To:* RE-wrenches<br>>> *Subject:* [RE-wrenches] NEC 690.74<br>>><br>>><br>>><br>>> Wrenches,<br>>><br>>><br>>><br>>> We have a string of batteries being inspected by a local AHJ. In plan-check<br>>> comments, I was asked to ensure that the flexible cable was UL-listed, so we<br>>> made sure of this when it came from the suppliers. We used 4/0 RHW-2. Now<br>>> our inspector is asking if "RHW-2 is fine-stranded in Article 400 of the NEC<br>>> as required by 690.74?"<br>>><br>>><br>>><br>>> Article 400 doesn't explicitly define any cable types for use in battery<br>>> systems, and the one general disclaimer is in 400.4: "Types of flexible<br>>> cords and flexible cables other than those listed in the table shall be the<br>>> subject of special investigation".<br>>><br>>><br>>><br>>> Has anyone had a similar request before? Anyone done a "special<br>>> investigation" on cables, and have results to share? Any other thoughts?<br>>><br>>><br>>><br>>> Thanks for any help,<br>>><br>>><br>>><br>>> -Phil<br>>><br>>> Real Goods Solar<br>>><br>>> _______________________________________________<br>>> List sponsored by Home Power magazine<br>>><br>>> List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br>>><br>>> Options & settings:<br>>> <a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>>><br>>> List-Archive:<br>>> <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br>>><br>>> List rules & etiquette:<br>>> <a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><br>>><br>>> Check out participant bios:<br>>> <a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a><br>>><br>>><br>>><o:p></o:p></p></div></div></body></html>