I have a machine that has 24v DC control power for all the contactors. I am adding a waste conveyor to it that will get its power from a separate A.C. source. I am going to come out of the Machine to use the 24v DC control power. Where the supply power conduit meets the control power conduit do I need two pipes out to the separate motor or can I combine them? AC and DC in the same pipe. Code References would be great.