max ocp size allowed in 200 amp panel?

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davedottcom

davedottcom

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I can't locate the article that limits the size of a breaker (Not Main Breaker!) installed in a 200 amp Dwelling panel. The breaker would be feeding a sub-panel. Could someone please tell me where the article is in the 2002?!? I know it's in there somewhere!

Thanks,
Dave
 
Re: max ocp size allowed in 200 amp panel?

check with the panel company to see what they make
i know that is not what you wanted to here , but they do limit the size. PEACE GEO
 
Re: max ocp size allowed in 200 amp panel?

I don't think there is such a rule. It is certainly not where I would put such a rule, in 408.
 
Re: max ocp size allowed in 200 amp panel?

Really, I could have sworn there was something about the largest breaker must not exceed a certain % of the Main breaker?
hmmm, no wonder I can't find it!

:confused:

Thanks,
Dave
 
Re: max ocp size allowed in 200 amp panel?

Dave,

Look at the label on the Panelboard.
I've seen max size breaker listed there.

Bill
 
Re: max ocp size allowed in 200 amp panel?

Are you certain that you are not confusing the concept of "overcurrent protection" with "maximum load"? For example, if all of the load on a circuit is "continuous," meaning it will run for more than 3 hours at a time, then that load should not exceed 80% of the breaker's rating.
 
Re: max ocp size allowed in 200 amp panel?

I believe the limit is more implicit. Is there a max current rating for each bus stab marked in the panelboard? If so, that is your breaker limit. How much bending space do you have? This will limit the wire size which ends up limiting OCPD. You'll be hard pressed to use #1/0 or larger in most dwelling panels, and even #2 can be tight in many breaker positions.
 
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