400 amp busbar BUT 300 amp line rating

[Anvilsbeme]

Did he not say that the inspector relented and accepted that the busbar was 400A? With a 300A MCB that gives him (1.2)(400A) - 300A = 180A of headroom on the bus. Is there some reason we are still talking about this? We (the company I used to work for) have documentation from Eaton that the CH load centers from 150A - 225A all have 225A busbars, and even the most contentious AHJs I worked with had no problem accepting it.

Yes, the inspector FINALLY relented and accepted that the busbar was 400.....now we have plenty of room before hitting the 120%.