I've been looking at a pal's installation where the CU really needs
updating due to extras having been added over the years. The house is '60s
built with imperial wiring in PVC, but earths appear to be present
everywhere including lighting circuits. The CU *I think*
isn't original as
it has MCBs and much appearance of 'bodging' inside - lots of chocolate
blocks. The house has been altered quite a bit and the wiring additions
look like standard builders work...;-)
However, the main problem I can see is the safety bonding. It's a PME
supply, in the built in garage where the CU is also. There's an earth
block, but only the gas pipework is bonded - nothing to the water system.
And that's the snag. The stopcock is in the kitchen and an extension has
been built between it and the garage making concealing an internal earth
wire virtually impossible. However, there's a mains water tap in the
garage which is fed off the adjacent cloakroom which is all plumbed in
copper and there is continuity from that to the pipework in the kitchen
after the stopcock. So is it acceptable to bond to that or will it need an
earth run all the way round the outside of the house to the kitchen?
*Do infants enjoy infancy as much as adults enjoy adultery?
Dave Plowman firstname.lastname@example.org London SW
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