SCCR rating for load center subfeed lugs

hmspe

hmspe

Senior Member
Location
Temple, TX
Occupation
PE
I have a plan review comment asking for the SCCR rating of 200 amp subfeed lug kit I specified. I don't see any SCCR rating listed for Square D HOML2225, Siemens ECSK2225, or Eaton BRPSF225. The subfeed kit will be in a 400 amp combination service entrance device. In this case the integral panel in the CSED will be series rated 22K/10K, but I have specified just a subfeed kit and no other breakers on other jobs without having plan review comments.

Any help or suggestions on how to either get an SCCR rating or to respond to the comment would be appreciated.
 
Did they ask for the sub-feed panel's series rating?

I guess I am a little confused. I am posting a link with different examples of "sub feed" and "feed through" since the terms are commonly mixed up.


Wouldn't you need a series rated breaker for the sub-feed panel that complied as well to use the 10k rated breakers in it? Or it is far enough away that the available fault current is less than 10k?

Or is the plan reviewer just confused on what sub-feed lugs are?
 
Here's a clip from the plan and a picture of what I intended.
 

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They probably think it is a breaker.

Or you have 10kA breakers down stream of the feed through lug kit and not enough distance from the service panel to that sub panel. But you should be able to show that with using the 22kAIC and the wire length and impedance. Or using a calculator like the Bussman FC2 app.

I got ~50' or less would mean you are over 10k at the down stream panel.
 
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