I’m putting a CNC router in at home. It is in my detached garage. I need to run some wire and install outlet(s) for it and have some questions…
The spindle, driven by a VFD, needs 220V service and draws something like 9-10 Amps.
The rest of the electronics use 110V service and current consumption is pretty low. This includes the computer, the control board for the motors and spindle, the stepper drivers, etc.
I have plenty of 110V outlets in the vicinity but need to run the 220V.
I happen to have a spool of 12/2 Romex already. With this I could run a 220V 20A outlet, plenty for the VFD+spindle, but I would not be able to split off a 110V outlet for the electronics. This would mean the spindle and the controlling electronics would have different paths to ground (on different branch circuits) but would also be connected via low voltage signal grounds.
As much as I play with electronics, things like ground loops still mystify me (because I’ve never cared or needed to).
Is this a potential problem? Should I pick up some 10 or 12/3 and run both the high and low voltage stuff off the same branch circuit?