Personally, I would not use sheathed cable, to avoid possible capacitance-effect diminution of signal. But Barry's first sentence is good advice.
I'll throw out another question for the electrical engineers to ponder: If one uses an AC-coil relay to turn a block on or off, energizing the relay to turn power on, can inductance from the coil near the contacts, when the coil is powered, have an effect on the DCS signal????
