My comment is just for info. On wire schedule 300N (for example) you state to use MI or VItalink. It's also showing 3c500KCM. MI doesn't make that. The largest 3 conductor cable is a #3 AWG. The solution is to go to a single conductor MI, which they do make a 500 KCM, but it holds a free air rating so the ampacity/voltage drop will improve (you can use a smaller wire). Vitalink MC and Lifeline MC also make single conductor which also hold the free air rating as well. Also there are some systems available that use RHW-2 wires in EMT conduits with a 2 hour system rating but do not hold the free air rating. These are generally a better option if the circuit is less than 380 amps, otherwise a single conductor MC is the next best option. Also if the pump controller and pump, etc are all located within the same fire rated room (any fire rating) you can use normal wire (NEC Article 728.5 only requires them outside these rooms, otherwise you could never use MI cable since it must be spliced to normal wire inside them). As for the other emergency circuits (not the fire pump) if it's fully protected by the automatic sprinkler system or contained inside 2 hour rated rooms, or concrete encased, you can use normal wire as well (700.10D). Also when I'm doing designs, I just call out "install per FHIT" since that covers all fire resistive systems and not just a brand name (including fire alarm). It's a catch all.
