We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember "Clive George"
saying something like:

stupid question What is the earth sleeving for? Purely saying "this is
earth, not some live wire which has just lost the insulation", or more?

Insulate and identify.
I've seen some CUs and sockets which have had no earth sleeving on the
earth conductors, which were wandering around. Dodgy practice, indeed.
--

Dave