i'm confused about the size of the live and neutral tails from the cut-off to the meter and from the meter to the consumer unit. What colour cables does code call for? Also, how would one tell the size of in-situ cables anywhere in a system?
16mm meter tails are common in existing installs and are ok on lower service fuses
but i would use 25mm for all new tails
modern meter tails have a grey outer and an inner colored red or black
older tails are only single insulated and are generally red and black or in some cases both black
tails on the incoming side of the meter are not your concern
sizeing in situ cables can be done in several ways
1: reading the print on the outer sheath
2: comparing with a known peice of cable
3: mesureing the outside dimensiona of a cable and looking it up
4: experiance
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