I've a question about the earthing connections on our domestic plumbing.
I can see that there is a wire in parallel to our water meter, but I'm
not sure that this can be the main earth because the supply pipe is
plastic. I can also see a wire going into the wall under the sink, so
my assumption here is that it mainly uses the electrical earth. But
there are speedfit connectors under there, which I expect are not
conductive, so there are parts (e.g. pipes feeding taps) that are
isolated from the rest. I'm not worried about this (although perhaps I
should be?), since all this was supposedly done by professionals; but I
thought I'd ask here if every single section of pipe is meant to be
individually earthed, or if that would not really be practical. Does it
even make sense to earth, for example, braided tap tails?