Given the cost of copper wire these days, my inclination is to run just the two hots to the panel and to put a grounding rod close up to the garage and run a local ground to it. I see no reason to run a neutral line from the panel (the machines are all 3 phase).
I know that I could run a ground line to the panel AND run a local grounding rod, but is it a bad idea to just do a local ground?
What gage wire for a 20HP RPC, but the main/biggest load/machine will be a 10HP spindle and a couple of 2HP machines, never all at the same time? ($ signs get much bigger with the wire gage/diameter :-)
Anybody near San Jose, CA have a spool of #4 or larger gage for cheap? :-)
Thanks in advance!