Re: Powering CNC from two different outlets?
Originally Posted by
PrestonH
Is it unwise to power my CNC with two different outlets?
.
Not good practice at all.
Do you have a 240v dryer outlet that could serve as double duty, as long as it was 4 wire, some were three wire(no neutral).
If you do use two outlets, ensure that the E-stop control circuit also enables the VFD power.
BTW, when using an isolation transformer, the earth GND has to be re-referenced by assigning one secondary conductor as a grounded Neutral due to galvanic isolation..
NFPA79 shows the method diagrammatically.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.