<div dir="ltr">The 120% rule refers to source breakers, not load breakers. </div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Dec 19, 2013 at 3:16 PM, SunHarvest <span dir="ltr"><<a href="mailto:eric@harvesthesun.com" target="_blank">eric@harvesthesun.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>
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<div><font face="Arial">Hi guys -</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">Concerning the 120% rule: I've encountered several
circumstances recently where a 400A nameplate-rated (listed on inside label)
main panel has two 200A main breakers. One of the breakers will be feeding the
busbar in the main and the other will feed a subpanel. I had previously thought
the main busbar is rated at the nameplate rating (400A in this case) regardless
of quantity of main breakers. My lead electrician says the main busbar in
these types of panels is derated to 200A because of the split. However, I have
two other reliable electrician friends who disagree with my lead electrician.
One of my C10 buddies says it depends on whether or not the busbar in the main
is broken up into 2 sections (200A) or it is continuous (400A). Can anyone clear
up, beyond doubt, our disagreement?</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">Thanks!</font></div>
<div><font face="Arial"></font> </div>
<div>Eric Stikes<span class="HOEnZb"><font color="#888888"><br>SunHarvest<font face="Arial"></font></font></span></div></div>
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