AL I doubt I will ever get to that full load amps.

As far as the Spindle power cable goes you are saying that I would just be manually twisting the three MTW and then running a ground MTW alongside outside the twist correct?

I will have to check the supplied encoder cable that came with the Z axis servo motor to make sure it has adequate shielding. Is there somewhere I can order the appropriate Belden 9891 wire from by the foot? I don't mind spending the money if It will prevent problems in the future.