Building a chain driven Plasma table.

You would certainly want to be using stranded CATn cable, but they can take some flex.
If you are running the cable to the head, then look at drag-chain rated cable.
www.rapidonline.com/Drag-Chain-Cable
I just noticed that Rapid don't have any any more. Conrad do, though:  www.conrad.com/p/faber-kabel-035356-drag...ld-per-metre-1152195

CAT cable is only for Cpc port.
Thinking of using Mike cables for sensors.
And automotive cables for Stepper Motors. Do I need to shield the cables for the Stepper Motors?

Stepper wires need to be 4 core shielded or you will guarantee countless hours chasing random issues
Don't forget to order the pins for those connectors. They are designed to be crimped and the tool is expensive.
You can also look at the Weipu SP-21 (12 pin) plugs and sockets. They come in sets. 
I would get some 9 core shielded cable and use it for your sensor wiring etc and the CPC interconnect cable.
Cat 5/6 is not that robust.

 

Shielded motor wires is probably good practice.
Having said that I don't have shielded cables on any of my machines.

rodw wrote:

Don't forget to order the pins for those connectors. They are designed to be crimped and the tool is expensive.

I made my CPC connecter cable from parts from Mouser here in the States. I used 22 Gauge 6 wire, 3 individually insulated pairs with overall insulation around the 3 insulated pairs. Probably unnecessary, but it's what I had on hand.

The pins are are designed to be crimped, but I soldered mine and squeezed the open end around the insulation a bit. That works perfectly fine, arguably a soldered connection is always better than a mechanical one.

Saved a bundle the CPC cord from Hypertherm is a bit pricey.

In my case pins were already included.