<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>I think it is <b>705.12.B.(2)(3) (b) in 2017. </b>The
inverter's OCPD must be at least 125% of the maximum continuous
current output of the inverter. That is 40A x 1.25 = 50A. <br>
</p>
<p>Then, the sum of the supply side sources, which is the Main
Breaker <u>rating </u>PLUS 125% of the sum of the inverter(s)' <u>maximum
continuous current output </u>must not exceed 120% of the
busbar rating. <br>
</p>
<p>With 200A busbar rating, you have room for 200 x 1.2 = 240A of
supply side amperage as defined above. 240 - 200 (assumed main
breaker rating) - 40 x 1.25 = -10A. This means you have exceeded
the allowance under this section. Options are to decrease the
Main Service breaker if a load calculation allows it, or the
supply side option. I would take apart the Main Service Panel and
get its rating. I often find a 200A panel has a 225A busbar. Then
you would be ok interconnecting as you have thought. Chris<br>
</p>
<div class="moz-cite-prefix">On 6/5/2019 10:33 PM, Darryl Thayer
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAHsrUiT083eeTY+cTZR+ukBxApoH3GTrbejO-rPrDpt3NsqhZQ@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div class="gmail_default" style="font-size:large">Can this
overcurrent protection be the current limit of the inverter?
I was challenged by a licensed professional engineer he said
it is the circuit breaker, I said it is the inverter. I said
I can put a 50 amp breaker into the circuit panel with a 200
Amp bus, (125% for continuous) on a 40 amp max output
inverter. I.e a 9.6 kW inverter on 50 Amp breaker bus bar
protected by inverter output. </div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
List sponsored by Redwood Alliance
List Address: <a class="moz-txt-link-abbreviated" href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a>
Change listserver email address & settings:
<a class="moz-txt-link-freetext" 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>
List-Archive: <a class="moz-txt-link-freetext" href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</a>
List rules & etiquette:
<a class="moz-txt-link-abbreviated" href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a>
Check out or update participant bios:
<a class="moz-txt-link-abbreviated" href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a>
</pre>
</blockquote>
</body>
</html>