Re: StyleCNC STM1325-R1 Wiring questions
Yes, you need a ground, and need to run ground wires to each motor. A ground bus bar would be perfect. Or you could use the spare terminals as ground connections, just run a ground wire to the back panel to ground it also.
The power wires to the motors would be connected to the terminals at the bottom of the cabinet. Not sure what the extra power terminals are for.
240V from your shop power would be connected to the Main Power terminal at the bottom, L1 (hot 1) to L1 and L2 (hot 2) to N. Standard USA wire colors would be L1 red, L2 black, and Ground green. Chinese wire colors are normally L1 brown, L2 (N) blue, and Ground green/yellow. Your shop neutral would not be connected to anything in this panel.
Jim Dawson
Sandy, Oregon, USA