Found the thread, very helpful.... thanks Glenn. <div>The current parallel discussion on Battery Cables REvisited is helpful too.<br><div>The inspector (She, btw) is extremely thorough. Although she has asked for proof of purpose-specific listings on just about everything, it seems I misquoted her in my previous post; I looked up her earlier plan review comments, and here's her original quote (from when my plans said to use MTW for the battery cable): "MTW is not NEC approved for use". I think that to her, if it isn't explicitly in the NEC then I can't use it (lists go from being partial & inclusive to complete & limiting). </div>
<div>-Phil<br><br><div class="gmail_quote">On Mon, Nov 29, 2010 at 6:03 PM, Glenn Burt <span dir="ltr"><<a href="mailto:glenn.burt@glbcc.com" target="_blank">glenn.burt@glbcc.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Hi Phil,</span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p><p class="MsoNormal">
<span style="font-size:11.0pt;color:#1F497D">I posted some information that is relevant back in March of 2009. It should be in the searchable archives…</span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">-Glenn Burt</span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </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">From:</span></b><span style="font-size:10.0pt"> <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a> [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Philip Boutelle<br>
<b>Sent:</b> Monday, November 29, 2010 8:08 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> [RE-wrenches] NEC 690.74</span></p></div><div><div></div><div><p class="MsoNormal"> </p><p class="MsoNormal">Wrenches,</p>
<div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">We have a string of batteries being inspected by a local AHJ. In plan-check comments, I was asked to ensure that the flexible cable was UL-listed, so we made sure of this when it came from the suppliers. We used 4/0 RHW-2. Now our inspector is asking if "RHW-2 is fine-stranded in Article 400 of the NEC as required by 690.74?"</p>
</div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Article 400 doesn't explicitly define any cable types for use in battery systems, and the one general disclaimer is in 400.4: "Types of flexible cords and flexible cables other than those listed in the table shall be the subject of special investigation". </p>
</div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Has anyone had a similar request before? Anyone done a "special investigation" on cables, and have results to share? Any other thoughts?</p></div>
<div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Thanks for any help,</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">-Phil</p></div><div><p class="MsoNormal">Real Goods Solar</p></div>
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