18th edition and bonding to gas and water

[Jakegood]

hi,

I have my 18th edition exam booked next week. I have just started to read up on the changes.
I am correct in stating that if the gas and water pipes have a plastic insulated section. At point of entry, then they do not require 10mm bonding??
Sorry if this is a stupid question....

Thanks

 

[Nigel]

That is correct yes.

 

[Octopus]

The same as it was in the 17th but with slightly improved wording

 

[Wilko]

Then my question is - if bonding was there, but now not required by the regs and we were doing a rewire (say) would we remove it or leave it in place? I would be leaving it, but I'm not sure that's right (?).

 

[suffolkspark]

Just remember if any of the pipes turn back to copper and are buried in concrete floors in the house then we should bond.... At least thats how i read it

 

[oracle]

The Regs say you may not leave it in a less safe condition, do you think you are?

 

[Midwest]

Just remember if any of the pipes turn back to copper and are buried in concrete floors in the house then we should bond.... At least thats how i read it

If it is extraneous of course.

 

[Luke238]

Ok so Im driving myself crazy with this.

Gas Bonding Question.
The gas supply is fed up to the property (domestic PME ) underground in plastic pipe. It comes out of the ground in plastic to a meter box.

The feed into the property enters in copper.

Does the gas need bonding.

Picture to help

 

[Pete999]

Yep it does

 

[Midwest]

The plastic does not The copper pipe might (if its extraneous), but the gas chaps would say it does.

 

[Ian1981]

No it doesn’t
What earth potential does a plastic pipe buried directly in the ground bring into the installation?
At what point is the metallic gas pipe buried in the ground?

 

[Pete999]

No it doesn’t
What earth potential does a plastic pipe buried directly in the ground bring into the installation?

Only if plastic pipe is entering the building we only have the OPs word that it's plastic, Sorry misread the thread thought the OP said it entered in copper my bad apologies, Ian.

 

[telectrix]

you need to test it.megger between copper pipe and MET if > 22 K ( 0.02 Meg.) do not bond. if < 22k, bond ....Simplesssss,

 

[AJshep]

Sure I posted this a while back. Have a read of this @Luke238
Protective bonding habbits

 

[Midwest]

Link doesn't work for me?

 

[AJshep]

Sorry, for some reason the forum keeps automatically shortening the URL not sure how to post a url without it doing it ?
Wiring matters 76
Or

https://electrical.------.org/wiring-matters/issues/76/

If either of these don't work google wiring matters issue 76 protective bonding habits.