ECN Forum Forums General Topics of the Trade General Discussion Area Wye/delta fire pump motor question

Have a 150 HP 480 Volt 3 Phase fire pump fed from a controller with a Wye/delta starter. I am running 6 conductors and ground to the(12 lead) motor. My co worker has already hooked previous ones up and installed all 6 conductors based on the FLA on the motor name tag. Tha would be wire rated for 173 Amps, and I found in 430-22 (I think---not near my code book right now) a reference to using wire rated at 58% of FLA from the controller to the motor. This would allow the use of #2 THHN instead of 2/0 or 3/0 and be easier.

In the run configuration of the starter does it use all 6 leads at a time rather than 3 for start and the other 3 for run...it must if code allows this. Where is a good place to look for an elementary explanation of these starters?

I will be able to ask a technical rep on Monday, but I am curious now...Thanks