Construction of my new shop is finally underway, and I plan to upgrade a few pieces of machinery (planer, drum sander) which will have 3-phase motors. The largest would probably be a 7.5HP motor. I plan to implement a rotary converter (or phase perfect if budget allows) and then hang a 3-phase panel off that, with a dedicated branch circuit for each 3-phase machine to/from the panel. I am in a residential setting (the workshop is essentially a 2-story barn) and I realize that in a commercial environment the 3-phase wiring would most likely be THHN wire run in EMT conduit. I am experienced and comfortable with residential electrical wiring having wired up my previous 2 shops, but have zero conduit experience. Soooo, my question is ... are there any major issues utilizing the appropriate gauge NM-B (i.e., Romex) wiring for 3-phase?? I'm thinking that 10/3 Romex would be much easier for me to install for the branch circuits to each machine rather than trying to master conduit bending, fitting, and pulling . I should note that the shop has an accessible basement so the wiring will be run from there (not buried in the walls) and then stubbed up to the main shop floor, so I can move/change circuits as needed.
Any insights from the 3 phase crowd are appreciated!
Thanks,
Tom