Ashu
Member
- Location
- Hunt Valley, USA
- Occupation
- Electrical Engineer
Hello,
I have a Control box mounted on the machine which has 24VDC controls and 48VDC power (No AC). Both of these potentials are fed from the power supplies in the Power cabinet mounted elsewhere on the machine. Inside this Control box, 24V DC power feeds the PLC cards and 48VDC power comes to two UL489 breakers (4A each) that feed to stepper motors on the machine.
I use a multiconductor cable to feed 24VDC and 48VDC to the Control box. I also use the ground conductor (18AWG) of this multiconductor control cable as EGC to connect the Control Box's ground Terminal block to the power cabinet's single point ground.
The question is: Is 18AWG ground wire enough for this, or there is a minimum size requirement for EGC in this case?
I will appreciate your thoughts/guidance.
Thanks.
-Ash
I have a Control box mounted on the machine which has 24VDC controls and 48VDC power (No AC). Both of these potentials are fed from the power supplies in the Power cabinet mounted elsewhere on the machine. Inside this Control box, 24V DC power feeds the PLC cards and 48VDC power comes to two UL489 breakers (4A each) that feed to stepper motors on the machine.
I use a multiconductor cable to feed 24VDC and 48VDC to the Control box. I also use the ground conductor (18AWG) of this multiconductor control cable as EGC to connect the Control Box's ground Terminal block to the power cabinet's single point ground.
The question is: Is 18AWG ground wire enough for this, or there is a minimum size requirement for EGC in this case?
I will appreciate your thoughts/guidance.
Thanks.
-Ash
