AC and DC Drive Conductors in the Same Conduit?
AC and DC Drive Conductors in the Same Conduit?
(OP)
One of our plants has DC motor conductors for several DC drives run in the same conduit. They want to replace one of the DC motors with a 3-phase induction motor and run the AC drive conductors in the same conduit as the DC motor conductors. I think this is a very bad idea but there is no Code restriction against it. It seems to me that the AC drive would be inducing weird AC currents in the DC conductors and that could adversely impact the DC motors. Comments?






RE: AC and DC Drive Conductors in the Same Conduit?
RE: AC and DC Drive Conductors in the Same Conduit?
If the DC drives are PWM controlled now, more hash in the pipe isn't going to cause an issue.
Remember that all the wires in a conduit have to have at least the insulation needed for highest voltage in the conduit.
Keith Cress
kcress - http://www.flaminsystems.com
RE: AC and DC Drive Conductors in the Same Conduit?
RE: AC and DC Drive Conductors in the Same Conduit?
Thanks for your comments!