View Full Version : Cable Size ?

09-05-2013, 01:48 PM
Hi everyone.

I have nearly finished wiring my first CNC control cabinet, I have used 7/0.2 cable for the 5 volt supply, but when I came to wiring up the Motors (I have 3 Nema 23's) I had a thought, the voltage is higher (36 volt) so what size cable do i need for the motors to the Driver boards? and do i need to shield them, if yes i can i do this simply?



09-05-2013, 02:55 PM
The voltage doesn't matter. I'ts the current that determines the size of the wires. 7/0.2 is rated at 1.4 Amps so is a bit light for your motors. It does depend on the motor rating which could be up to about 3 A depending on the exact model. I would go for at least 16/0.2.

Screening should not be needed within the cabinet provided you keep the input signal wires away from the motor wires.