Originally Posted by martini
Ideally you would run power down one side and signal cables down the other. Failing that I'm sure I've seen some flexible sheathing that screens the cables.
We're talking about DC power here, so I think separating them is not really critical. I'd be more concerned with high frequency signals migrating between cables, but most high freq cables are already shielded.
How about laying everything out before pulling cables, bundle them together, and see if you have problems?