To bond or not to bond

Calebp43 · Jul 11, 2022

In a job today me and my colleague where discussing whether or not we had to earth the incoming water. It comes in blue pipe as you can see from the photos. I haven't got my regs book to hand but in the regs book it said that it doesn't need bonding if the water comes in blue pipe.
See photo.
We are going back tomorrow or this week so we will make a decision then on whether or not to bond it. What's your opinions?
Also the photo of the bonding done to the boiler is just there to show that the pipes are bonded. Just not the incoming water. Thanks.

buzzlightyear · Jul 11, 2022

No bond considereding is not extraneous. Its PVC.

westward10 · Jul 11, 2022

What would you mind exactly it is multiple sections of metalwork insulated from each other by the plastic parts.

Calebp43 · Jul 11, 2022

westward10 said:
What would you mind exactly it is multiple sections of metalwork insulated from each other by the plastic parts.

Do you mean what would I bond exactly?
Tbh I thought it didn't need to be bonded

UNG · Jul 11, 2022

I'm not sure I would be cross bonding all the boiler pipework when the t&e feeding the boiler looks a right dogs dinner

Calebp43 · Jul 11, 2022

UNG said:
I'm not sure I would be cross bonding all the boiler pipework when the t&e feeding the boiler looks a right dogs dinner

Thats the stat cable. The flex is the feeder cable. Why would you not cross bond the boiler pipework?

ipf · Jul 12, 2022

Calebp43 said:
Thats the stat cable. The flex is the feeder cable. Why would you not cross bond the boiler pipework?

Why would you cross bond them?

UNG · Jul 12, 2022

Calebp43 said:
Thats the stat cable. The flex is the feeder cable.

Which ever way round they are neither are clipped or contained in a small trunking to tidy them up

Calebp43 said:
Why would you not cross bond the boiler pipework?

The boiler bonds all the metalwork and if the boiler was removed it's likely the mag filter would be as well so the bond on filter pipwork is on wrong side of the filter

Calebp43 · Jul 14, 2022

UNG said:
Which ever way round they are neither are clipped or contained in a small trunking to tidy them up

The boiler bonds all the metalwork and if the boiler was removed it's likely the mag filter would be as well so the bond on filter pipwork is on wrong side of the filter

Okay fair enough about the trunking or whatever. It's just the way I have been taught. The attitude was that it will be boxed in so why charge more for no reason.

Yeah you're right about the bond on the filter pipework.. gonna change that now if I can get the length.
With regards to the boiler bonding everything cuz it's earthed... Makes sense but I thought the reading had to be within 0.05ohms and I thought the whole point of cross bonding with a 10mm earth was to ensure the reading was good enough?

Calebp43 · Jul 14, 2022

ipf said:
Why would you cross bond them?

Don't you need to make sure all pipes have a better reading to the MET than just with a 1.5mm CPC from 2.5mm flat twin?

Pure Electrical training · Jun 12, 2023

Calebp43 said:
In a job today me and my colleague where discussing whether or not we had to earth the incoming water. It comes in blue pipe as you can see from the photos. I haven't got my regs book to hand but in the regs book it said that it doesn't need bonding if the water comes in blue pipe.
See photo.
We are going back tomorrow or this week so we will make a decision then on whether or not to bond it. What's your opinions?
Also the photo of the bonding done to the boiler is just there to show that the pipes are bonded. Just not the incoming water. Thanks.

davesparks · Jun 12, 2023

Calebp43 said:
It comes in blue pipe as you can see from the photos. I haven't got my regs book to hand but in the regs book it said that it doesn't need bonding if the water comes in blue pipe.

The regs talk about pipes made of an insulating material, such as plastic,as being unlikely to require main bonding.

It doesn't matter what colour the pipe is!

bennie · Jun 13, 2023

davesparks said:
The regs talk about pipes made of an insulating material, such as plastic,as being unlikely to require main bonding.

It doesn't matter what colour the pipe is!

The regs talk about an insulated section of pipe where the service enters the building and also if the mains come in in plastic 150mm or over but if the pipe work then goes to metal you should still be testing to make sure if we still need to bond or not, if not remove the cross bond its not needed. I know they said blue pipe but I'm sure they ment plastic. I think plumbers do this sort of thing on purpose.

freddo · Jun 13, 2023

I'm more bothered about the terrible plumbing under the sink than what wires are attached to it. Plumbing used to be a job for skilled tradesmen.

ipf · Jun 13, 2023

freddo said:
I'm more bothered about the terrible plumbing under the sink than what wires are attached to it. Plumbing used to be a job for skilled tradesmen.

A decent plumber could say the same about some of our trade's rubbish though, fred.
Standards across the shop, mate.
Look at the state of some of these new 'high class' houses going up.....all trades.