400a 3ph MB with 300a trip unit - wire size?

[Atm]

i think it's whatcha call an "unfiltered data feed"......

Does 240.6 (c) help the OP?

 

[roger]

I asked him if I could pose a goofy hypothetical scenario for a frame of reference:
suppose I install a 600 amp fusible disconnect, and install 100 amp fuses in it?
His answer is that I would have to feed a 600 amp disconnect with a cable large enough for 600 amps, regardless of fuse size

Bob was right, the inspectors an idiot.

Roger