What is meant by 4-core CY cable?

[MikeyC38]

The colours don't matter, the electricity does not care about the colour of the cable so 4 core cy cable has 4 cores as you have stated all of them are separate from the screen. The screen should be earthed at a star point (where all the earths are connected together to avoid any ground loops in the control box) you only need to earth one end of the cable, depending on the size of the motors I use 1mm others use 1.5 mm. Good luck with your build. ..Clive

Thanks Clive for the prompt reply. I am using the Zapp Kit 1 ( NEMA23 3Nm Steppers, 36 volts 4.2A) so I guess 1mm2 should be ok and connect the screen at one end only (the control box) as you said. 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.

Regards
Mike