I have just removed a cupboard in my kitchen. I found a thickish
earth cable just coming out of the plaster but not connected to
anything. I am guessing that it was intended to be some sort of
bonding to the cold water supply which enters near by - but the cable
is just not quite long enough to be connected to the copper water
pipe. There is a junction box near by, which appears to be part of
the ring main - it has a spur going off to a power socket above the
work surface.
Should I extend the earth cable and connect it to the incoming water
supply; should I also connect it to the earth on the ring main, or do
something else, or do nothing.