You can't tell by the pic's, (I cropped the last pic' too close, but B and C are rotated) the trip settings were never adjusted, making phase C, or B (Depending where you are in the service) MCOP 250A, on a service lat. that covers 2 other parts of 6 services on wire rated for only 156A.
The "on-paper-engineering" that accompanied the bid for this job spec'ed existing service equipment at 400A, (which is what the panel section that it is in is rated for, not the breaker or wire feeding it, or in total capacity of the service wire.) the space it will serve will use every bit of it.
We lost the bid by $20k, not including the service. We think because they either wanted to get an "in" with our client, or forgot $20k worth of lighting. Either way, they low-balled a nightmare, good luck to them, as the service will also be hell to re-do, impossible to make real money from. The client will hold them to the details, and walk them right to the cleaners.
"Well - I oughta....." -Jackie Gleason