Good points. I would think a more dangerous situation would be the case that you often have with large parallel feeders landing on a single OCPD. If one wire has a little less resistance, it will always run hotter than the other, and you could easily overheat a wire that is protected by that large OCPD.<div>
Thanks<br><br><div class="gmail_quote">On Wed, Sep 26, 2012 at 6:48 AM, Jeff Irish <span dir="ltr"><<a href="mailto:jeff@hudsonsolar.com" target="_blank">jeff@hudsonsolar.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d">Code issues aside, even two seemingly identical runs each with breakers would have at least slightly different resistances, causing the lower resistance run to
take more than half the total current, tripping the breaker in that run, then causing a tripping of the breaker in the other run.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d">Jeff Irish<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<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""> <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>mac Lewis<br>
<b>Sent:</b> Tuesday, September 25, 2012 9:16 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> [RE-wrenches] parallel OCPD<u></u><u></u></span></p><div><div class="h5">
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<p class="MsoNormal">Hello wrenches,<u></u><u></u></p>
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<p class="MsoNormal">Does anyone understand why you are not allowed to have parallel separately protected runs of wire.<u></u><u></u></p>
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<p class="MsoNormal">For example, say I need 120A from point A to point B, why doesn't the code allow two runs of #6 breakered at 60A each. Its probably obvious, but not to me...<u></u><u></u></p>
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<p class="MsoNormal">-- <u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Mac Lewis<b><span style="font-family:"Arial","sans-serif";color:#ff9900"><u></u><u></u></span></b></p>
<p><span>"Yo solo sé que no sé nada." </span><b><span>-Sócrates</span></b><b><span style="font-family:"Arial","sans-serif";color:#ff9900"><u></u><u></u></span></b></p>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div><br></div><div><font color="#305A78" face="'times new roman', serif"><br></font></div><div><br></div>Mac Lewis<br><br><span style="font-family:'Times New Roman';font-size:medium;color:rgb(255,153,0)"><b><font face="Arial, Helvetica, sans-serif" size="3"><p align="left">
<font color="#000000" face="Verdana, Arial, Helvetica, sans-serif"><span style="font-size:small"><span style="font-family:arial;font-weight:normal;color:rgb(48,90,120)"><font face="'times new roman', serif">"Yo solo sé que no sé nada." </font><span style="font-weight:700;color:rgb(104,104,104)"><font face="'times new roman', serif">-Sócrates</font></span></span></span></font></p>
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