For some reason I cannot quote John's quote of his own passage about the gas pipe probably being new plastic and not needed to be bonded and discussion being moot ...
The 'quoting facility in this forum doed not include a 'quoting of quotes' - so if you want to include things that were quoted in the post you are quoting from, you have to 'add them yourself'.
- YET it's still good to talk about things, it's never stopped other topics going off the boil and although the topic has often been discussed, I can't say I've ever had much to say about it.
All true, but we need to keep OPs in mind - and I didn't want the OP in this thread to get confused by all that was being discussed, given that it is very likely that
none of his gas pipework needs main boding
anywhere.
So - to confirm - are we saying a first floor flat with a meter box at ground level should only be bonded inside the flat, as near as practicable to where the pipe enters the flat?
That is certainly what 'electrical common sense' would say, since the whole purpose of main bonding is to create an equipotential zone
within the flat. Of course, as above, if the incoming gas pipe is not an extraneous-c-p (because the supply pipe to the meter is plastic, and the meter is above ground), then no main bonding is needed
anywhere.
I have witnessed many a gas engineer condemning such a thing, where he has expected it to be in the gas meter box.
I can't answer for gas engineers - maybe they are less conversant with 'electrical common sense'?
On a different token, I have seen upstairs flats individually bonded inside the flat where the pipe enters, AND a bonding cable from the communal supply going to all gas meter boxes for all the flats on the outside wall of the building.
It's all a bit 'belts and braces', given that all the earths/bonding, and all the (necessarily metal) gas pipes, within the building, will be electrically connected together, but some might argue that communal parts of the building should have main bonding, just as should the individual flats, but that's not really anything to do with the electrical installation of an individual flat.
Having said that, and going back to 'electrical common sense', IF there IS an extraneous-c-p entering the building, and if that is main bonded where it enters the building, then the whole building should have been rendered an equipotential zone, such that main bonding in individual flats should not be required.
Kind Regards, John