OP
davesparks
With numbered multi-core , sequentially the Lives are first then Neutral followed by Earth being last , and any spare after that then being tagged down to Earth as well .
On a side note , when it comes to any connections , unless already marked I go with live first then earth in the middle , with neutral last . This way if either connection should pull out / melt they have more chance of earthing out first .
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On multicores I use odds as lives and evens as neutrals, but this is again due to a common convention in the stage lighting industry which comes from the convention for socapex connections.
So if you use live first then earth then neutral why not use core 1 as live, core 2 as earth and core 3 as neutral?
If you through joint an old 3 core to a new one do you cross the cores over and join the yellow to grey and the blue to black?