Thank you for your reply! It's not that I can't get a rep to tell me what to install. but I sure like to understand what I'm doing. Your comment about the 4,5,6 leads tied together momentarily is along the ideas of what i was thinking, and I will continue to investigate. The reason for the reduced size of the 6 wires from controller to motor, then, is that each is only one run of two in a set of parallel runs? I will have one set of 3 wires from service to fire pump equip's line side fully rated for the FLA plus percentage required, and then two sets of wires from controller to motor rated at 58% of whatever value the duty requires giving the starter the ability to momentarily run as a wye config and then run as a delta with parallel runs.
