6mm water bonding on PME

[Andy78]

Correct. Guidance from the NICEIC to it's members now is undersized main bonding cannot be left if alterations and additions are taking place.
To the OP. I had a similar problem recently, I got a plumber to install a short plastic section just beyond the stopcock. Was a lot cheaper and less disruptive than getting a 10mm to it on that job. Might be an option for yours as well and covers your ---.

That's not the case going by the guidance endorsed by the IET, and they write the regs. I'll stick with that.
6mm is deemed adequate in any situation.

 

[sinewove]

If the water main is PVC, it doesnt need bonding!

PS It always amazes me this, why do people who are selling a property think that they have to change the consumer unit?

Could it be because the buyer might say it needs rewiring and knock a load off the price?

 

[TheCodboy]

My house is a very similar build and layout to the OPs. Luckily I had extensive kitchen works done a couple of years ago so I managed to pull in a 10mm bond but it still took me a couple of hours of lifting carpets and cutting chipboard flooring to get the cable in. Annoyingly a few months later I would not have needed a bond as the incomer is plastic and there's no earth potential...

For a simple board swap this scenario would add a lot to the price of a job and most customers would refuse to have the work done purely for the disruption and mess.

Potentially one method would be to convert the earthing arrangement to TT but then this has it's own inherent issues.

What's to stop some unscrupulous individuals from splicing 10mm onto the 6mm just out of sight to appear to comply with 544????

Im shocked at such a suggestion........

 

[radiohead]

That's not the case going by the guidance endorsed by the IET, and they write the regs. I'll stick with that.
6mm is deemed adequate in any situation.

So lets say in a non dwelling setting the minimum (based on the supply N) required copper main bonding conductor according to BS 7671 for a TNCS supply is 35mm you'd happily leave a 6mm in place as you've stated it is adequate in any situation?

 

[davesparks]

So lets say in a non dwelling setting the minimum (based on the supply N) required copper main bonding conductor according to BS 7671 for a TNCS supply is 35mm you'd happily leave a 6mm in place as you've stated it is adequate in any situation?

Where is that in BS7671?

As far as I am aware there is no distinction between dwellings and non dwellings with regards to the sizing of the main bonding.

 

[radiohead]

Where is that in BS7671?

As far as I am aware there is no distinction between dwellings and non dwellings with regards to the sizing of the main bonding.

Where did I state there was a distinction between dwellings and non dwellings in Bs7671?
I used an example of a non dwelling simply because it is highly unlikely that a 35mm bonding conductor will be required in any dwelling.

 

[Andy78]

So lets say in a non dwelling setting the minimum (based on the supply N) required copper main bonding conductor according to BS 7671 for a TNCS supply is 35mm you'd happily leave a 6mm in place as you've stated it is adequate in any situation?

This thread is about work in a domestic dwelling installation and the guidance I mentioned also deals with this situation. I was trying to keep the advice relevant.