V
vicvapour
As mentioned above the gas pipe is definitely earthed its right next to the meter.
But we are still confused about the other pipes needing earthed would it be ok to link all the other pipes to the gas pipe at the boiler?
And would this then make them all earthed?
The consumer unit is a old one that still use's wire not rcd breakers.
Thanks again Steve
Supplementary bonding is not earthing. The objective is not to create a new earth path because that is what the earth in the mains cable is doing. Linking all the pipes to the gas pipe might make it a 'better' earth than the cable and I don't think that is a good idea.
The objective of supplementary bonding is to ensure that all exposed metal parts, ie. taps, etc are at the same voltage if there is a fault. Then you don't become a conductor if there is a fault and you touch both parts. As has been said it's not needed any more on modern installations.
Since your CU is so old you need to ask an electrician.
This is not actually the case
Any alteration or addition to an existing installation must comply with the current edition of BS 7671 (including any amendments). This requires any earthing and bonding arrangements upon which the alteration or addition relies for safety to be adequate.
Regulation number(s)
BS7671
132.16
633.2
411.3.1.1