<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="Generator" content="Microsoft Word 12 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style></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">John,</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I’m assuming that you’ve got a mix of household voltages (120 or 240 volts) and low voltage cat-5 cable. You can’t do that, here is the code:</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">NEC 300.3(C)(1) Conductors of Different Systems. 1000 Volts, Nominal, or Less.</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> Conductors of ac and dc circuits, rated 1000 volts, nominal, or less, shall be permitted to occupy the same equipment wiring enclosure, cable, or raceway. All conductors shall have an insulation rating equal to at least the maximum circuit voltage applied to any conductor within the enclosure, cable, or raceway.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">If you have 600 volt rated shielded cat-5 cable you might be okay.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Separately, it sounds like the grid-tied setup you explain below of disconnecting batteries from the grid when they are full may not be a good idea either. Normally you would keep batteries topped off and connected to the grid for a grid-tied battery backup system. Can you elaborate on what the customer is trying to accomplish by this control scheme?</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Best,</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">August</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Luminalt</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";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;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>John Blittersdorf<br><b>Sent:</b> Monday, August 22, 2016 6:26 AM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> [RE-wrenches] Cat 5 cable in 240 AC power conduit with #2 alum entrance wire.</span></p></div><p class="MsoNormal"> </p><div><p class="MsoNormal">Wrenches,</p><div><p class="MsoNormal"> I have a customer who has pulled a cat 5 cable through his power conduit (2" PVC) to a new barn for about 120' and wants to use it for ethernet and telephone. Wants me to use a pair if wires in the cable to trigger a relay to disconnect a direct grid tie inverter (AC Coupling) when batteries are full on his double GVFX3648 backup system He wants it in writing from experts that it is not a good idea. Has anyone done this and had good luck with it or have opinions?</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">John Blittersdorf</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">formerly owner of Central Vermont Solar & Wind</p></div><div><p class="MsoNormal">now working for the new owner Rob Stubbins Solar </p></div><div><p class="MsoNormal">(I get a regular paycheck and (usually) regular hours. </p></div></div></div></body></html>