What is meant by 4-core CY cable?

[JAZZCNC]

I will be using 4 pin XLR plugs and chassis sockets as they seem to have good contact surfaces and provide some locking to prevent accidently being pulled out! Found 4 pin XLR plugs at Maplin, but no sockets! Ebay to the rescue again and sourced 3 pairs reasonably priced.

Let me just say that unless you intend to move this machine about often then I wouldn't use any connectors. Wire direct from motors to control box to lessen any potential for poor connections and places for bad joints. These type of connectors are one of the prime trouble areas after newness as worn off and cables weight starts putting stress on connectors and pins. They where never designed or intended to be left permanently connected and are meant for short term quick release and connection for the music industry.

Have you bought the Zapp Kit yet.?