And how often do you find a panelboard with an MCB that is significantly smaller than its bus?
Depends on who is asking:roll:
Often, I indicate the following on the single line diagram of my permit drawings:
(E) MSP, 200 A rated
(E) 2p175A Main Breaker
(N) 2p60A PV breaker
You can bet the 2p175A breaker will be existing when the inspector gets there.