Fire Pump / Generator Backup

[NKC]

We have a 200hp Fire pump in the basement of a high rise building that is being turned into apartments. The normal feed coming in from Utility is good coming from the utility vault to the Main switchboard. Both are 2 hour fire rated rooms. Normal power from main switchboard (un-switched off the incoming buss) to Fire pump room is underground. and comes up in the 2 hour rated fire pump room.
The 550 KW Generator is located on the top of the parking garage Level 7. It feeds to a generator switchboard inside the building. The conduits from the generator to the switchboard go down and across L6 parking and back up into the bottom of the switchboard. The feed from a 300A breaker in the Switchboard drops down through the bottom of the switchboard continuing down the parking levels to the basement and horizontally to the Fire pump room controller/ATS.
The design team calls for the 2 hour rated cable from the switchboard to the Fire pump controller / ATS. Pricy little 200' run.
From what I can find in the Code the 2hr branch wiring only needs to run from the Generator switchboard overcurrent device feeding the Fire pump ATS.

The current design does not require any special wiring from the generator to the generator switchboard in the building. I'm trying to verify we are good with the design teams design before I put in the 800A parallel feed from the generator to the switchboard which is not 2 hour rated and would require larger conduit for the rated cable.

 

[WireBiter]

Seems like 700.10(D)(2) would apply, I would think. Of course, it depends on the occupancy requirement of 700.10(D)(1).
Note the use of 'Feeder-Circuit', which I take as the conductors all the way back to the source BU gen.

Have you scoped that part out?

 

[NKC]

Seems like 700.10(D)(2) would apply, I would think. Of course, it depends on the occupancy requirement of 700.10(D)(1).
Note the use of 'Feeder-Circuit', which I take as the conductors all the way back to the source BU gen.

Have you scoped that part out?

Thanks for that Code references to look into. I does meet the occupancy requirements on 700.10(D)(2) The Wiring from the Generator where it enters the parking garage on L6, to the Generator switchboard room on L7 is all Fire Sprinkler protected 100.10(D)(1.1). I'm thinking that is why the engineer didn't call for that portion to be 2 hour rated cable and only the branch circuit out of the switchboard to the fire pump.
The whole parking garage, electrical, mechanical rooms as well as the rest of the building is 100% automatic sprinkled.