could be a sleeve but it's definately earth. Have metered and getting 240 on RED, and this where i'm puzzled 110 on BLUE but BLACK is cut right back and i can't get to it.
As for where it comes from I can trace back to a very full outside store but being in a wheelchair can't get to...
I've found a 'junction box' outside and the cable entering it is thicker than normal so presume it's special outside cable but looking at it I just want to clarify what each cable does
RED is Live, GREEN/YELLOW is Earth, BLUE is Neutral and so what is BLACK? Is this also Neutral or is BLUE...