Load of a 100% Rated Circuit Breaker

[ron]

http://static.schneider-electric.us...nsulated Case Circuit Breakers/0600DB0101.pdf

Considering the White Paper above, We have a distribution panel with 100% breakers that will be serving continuous loads.

One of the 100% rated breakers (400A) in the DP panel will feed a 400A MLO panelboard. Although the 100% rated breaker is listed / tested in the DP panel, the downstream MLO panel doesn't have any special testing and will draw up to 400A of continuous load.

Do you see an issue? Is a regular MLO panel capable of 100% loading? I don't know of any such 100% rating for a MLO panelboard on its own.

 

[ron]

It looks like I have a bad memory and ask the same questions over and over. http://forums.mikeholt.com/showthread.php?t=133621

As a result of re-reading that post, I'm guessing the 400A MLO panelboard is ok for 100% continuous loading.

 

[Smart $]

...
As a result of re-reading that post, I'm guessing the 400A MLO panelboard is ok for 100% continuous loading.

As long as the branch breakers are loaded not more than 125% continuous plus 100% noncontinuous, you can go up to 400A continuous plus noncontinuous total.