In an earlier contribution to this discussion,
Lobster wrote:

I need to connect up earth bonding conductors to my incoming gas and
water supplies, and have just checked Whitfield's "Electrician's
Guide" to double-check which side of the respective stop cocks to
attach the bonding.

For an all-copper system like mine, Whitfield shows the water pipe
earthed on the *street* side of the stopcock, whereas the gas pipe it
is on the *house* side of the stopcock (Fig 5.13). I'm assuming that's
correct but can't understand the logic behind it - before I unpack my
earth clamps please can someone explain?!

Thanks
David

Assuming that the stopcocks and the pipes either side are all made of
conducting material, does it really matter?
--
Cheers,
Roger
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