Earthing and bonding new build

[adsmith]

Hi guys bit of advice needed to save me some time and money. Earthing and bonding required in new build property. 10mm earth to be ran to gas meter to clip to gas pipe that will enter property. This gas pipe then goes to a combi boiler where I will bond all pipes at combi to the gas pipe (gas, cold water, hot water, radiators in and out) (all copper)

But when it comes to earthing the water main I come unsure. The water main into property enters the building via the blue plastic pipe under kitchen sink but as mentioned the house is piped in copper. So my question is do I have to run 10mm earth to copper side of water stop cock all the way in the kitchen or will the bonding at the combi boiler be sufficient as the cold water pipe will be bonded to earth via the earthing of the gas pipe. Hope this makes sense
Thanks again in advance !

 

[telectrix]

no need to bond anything at boiler. as for water, test from MET to copper water pipe with MFT. if <22 k ohms, (0.02 Megohms) then bond it.

 

[adsmith]

Why is there no need to bond anything at the boiler? Other issue is there is no MET yet as the elec supplies are yet to be installed to the property as building is still being built

 

[telectrix]

Why is there no need to bond anything at the boiler? Other issue is there is no MET yet as the elec supplies are yet to be installed to the property as building is still being built

main bonding to gas and water suppliy pipework if required. that's all you need. long gone are the days when cross bonding @ boiler... hot - cold. metal windows. just thimnk at a bolier, all pipes are connected to each other through a metal manifold. why add additional bonding?

 

[littlespark]

If it's a new build, and you don't know if you need it yet or not without the MET to test to, then just put it in and leave. It will take about 2 minutes.

If you do need it in the future, great, its there

 

[APE37]

As already stated. If supply in plastic and the copper pipes are not classed as extraneous, then no need to bond. But as there is no MET to test from, it wouldn’t hurt to run in just in case. Little bit more time and materials but better to be safe than sorry.

 

[Strima]

No need to bond at the boiler unless the manifold is non-conductive?

 

[Midwest]

Are you sure 'all' the house plumbing is done in copper. Most new builds now, are a combination of push fit, and bits of copper.