Ron:
EXPERIENCE.....field work in comm, after the Vo-Tech time, or as soon as you're ready.
Class time in PLC's, transformers, motor controls, etc. are all available at Vo-Tech.

The items listed above are all necessary.

Pipe skills are 'learned', but...doing it on a regular basis is the way to go. Big wire & big pipe (to resi guys) are commonplace for comm. A 20 amp, 3 phase, 4 wire circuit is the same as a 2000 amp, 3 phase, 4 wire.
Just bigger.

Catch up with me for some '1 on 1' if you have time. You have to be ready to make the jump; mentally and financially. I have some contacts that may be of interest

John



John