Supplementary bomding

[Peter Wrench]

Can I ask a question.

We have had a new bathroom fitted and when they fitted it they removed all bonding from the bathroom including the 10mm to the shower.
When I asked about this the said it was not needed as protected by rcd.

 

[Corbs]

shower elec or mains equal pressure (combi boiler)?????? and not true still need bonding in certain parts,

 

[Peter Wrench]

Electric shower, with 24v pumped shower tray waste. toilet well within zone 2 sink and radiator just out side.
all bonding removed reliant on cpc.

 

[davesparks]

There's a bit more to it than just fitting an RCD!

It is true that the requirement for supplementary bonding is less now than it was, but you can't just ignore it.
You should be testing all exposed pipework to establish whether bonding is or is not required. If the pipework is already connected to the installation earth (bonded elsewhere) it is ok and if it's resistance to earth is above a certain value it is also ok. Anything else needs bonding.
In all cases an RCD is still required.

 

[Peter Wrench]

So ok as long as no changes to suitable pipe work.

 

[davesparks]

No, that's not what I said!

What I said is that the pipework should be tested to ensure bonding is not required.

 

[Peter Wrench]

Sorry no offence intended.
I was just thinking that even if the pipe work did not require bonding at the time a small change like adding a small piece of plastic pipe down the line could change this.

 

[davesparks]

Yes it could and at that time it should either have earth continuity maintained across the plastic joint or be tested to see what effect it has had on the continuity

 

[Peter Wrench]

Thank you.
I used to work in the industry, completed 1st year and have only just rediscovered my interest.

I would like to get back into it but not keen on paying 5K for a course that offers no experience.