[RE-wrenches] AC breakers used in DC applications

Drake Chamberlin drake.chamberlin at redwoodalliance.org
Sat May 15 08:43:19 PDT 2010


I did see a QO breaker fail to trip on a 24 volt DC system with only 
battery voltage behind it.  It burned a #12 wire completely in two.


>The 48v is a max rating not a nominal rating.
>So yes only good for 12 and 24v systems.
>
>However with CBI breakers I don't understand why the need for QO for 
>DC anymore?
>
>jay
>
>peltz power
>On May 15, 2010, at 6:28 AM, Rebekah Hren wrote:

Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648  
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