Paul,
I agree mate, it's become a real disaster as far as management goes, considering that we have a whole range of systems of identification, none of them really co-ordinated, it's just a good thing that people like ourselves know to be able to trace circuits and know what the colours could mean.
We haven't been hit here by the new colours here yet, but you can bet it's in the pipe-line.
Kiwi,
I have an idea that the Green/Yellow Earth wire started in the UK.
(If I'm wrong, no doubt I'll be corrected) [Linked Image]
Reason I say that is because appliances in the UK were/are sold without a plug fitted.
Red/Green and Red/Black colour blindness is the most common.