Does this require Main Bonding?

[HappyHippyDad]

The water pipes enter the house in metal, then there are a few cm's of copper after the stop cock and then plastic. It is hidden behind the kitchen draws (which can be removed to access).

Does this require Main Bonding? The stop cock tests as 0.36Ω to earth, it is TNCS.

I just cant see how fitting a Main Bonding cable achieves anything in this case?

 

[Deleted member 9648]

The water pipes enter the house in metal, then there are a few cm's of copper after the stop cock and then plastic. It is hidden behind the kitchen draws (which can be removed to access).

Does this require Main Bonding? The stop cock tests as 0.36Ω to earth, it is TNCS.

I just cant see how fitting a Main Bonding cable achieves anything in this case?

Your own test has determined that the incoming pipe is extraneous so needs bonding as per BS7671:2018.

Whether or not it does anything or not is a mute point as BS7671 does not give much wriggle room. Is it extraneous? Yes. Is

there an insulating​

section at the incoming point to the property? No. So it requires bonding whether we like it or not. There is nothing in BS7671 that states the main incoming water pipe needs to be accessible - 544.1.2.

The OP appears to state there is an insulating section close to the point of entry. Of course the stopcock will be extraneous, but the regulations clearly state now that a short section of incoming pipe which has an insulating section close to the point of entry will not require main bonding.

 

[Deleted member 26818]

The OP appears to state there is an insulating section close to the point of entry. Of course the stopcock will be extraneous, but the regulations clearly state now that a short section of incoming pipe which has an insulating section close to the point of entry will not require main bonding.

The insulating section has to be at the point of entry.

 

[Nigel]

The OP appears to state there is an insulating section close to the point of entry. Of course the stopcock will be extraneous, but the regulations clearly state now that a short section of incoming pipe which has an insulating section close to the point of entry will not require main bonding.

As above- it has to be at the point of entry, not close to.

 

[DefyG]

The OP appears to state there is an insulating section close to the point of entry. Of course the stopcock will be extraneous, but the regulations clearly state now that a short section of incoming pipe which has an insulating section close to the point of entry will not require main bonding.

Only applies if a blue plastic service pipe, does not apply if a metal service pipe!

 

[UNG]

I would say no based on niceic advice at tech talk, but I wasn't sure about that advice as the water in the copper and plastic pipes is conductive so a path to earth can penetrate.

Before anyone says anything I know pure water isn't conductive.

Do we get pure water out of a tap?

 

[ruston]

No, it is full of minerals , that is why you cannot put it into car batteries. We have a lot of lime in the water up here , the worst I seen was in Hendon London.

 

[Nigel]

No, it is full of minerals , that is why you cannot put it into car batteries. We have a lot of lime in the water up here , the worst I seen was in Hendon London.

No way did London let you in.

I will need to have a word.

 

[ruston]

I told them I was from Essex and they would not give me a visa, so I told them I was from the North East and they sent a Limo for me.
Next time I come I am coming to see you .

 

[Nigel]

I told them I was from Essex and the would not give me a visa, so I told them I was from the North East and they sent a Limo for me.
Next time I come I am coming to see you .

I must make sure I am out ;-)

 

[Deleted member 26818]

Why wouldn’t I let him in?
Anyway, Hendon’s hardly London.

 

[Deleted member 109422]

The last time I went to London I got a nose bleed.

 

[ruston]

@Sym . A gift , or nature taking it's course?

 

[Deleted member 109422]

I live in the Fens, London has altitude.

 

[DefyG]

I suppose it depends

then there are a few cm's of copper after the stop cock

on how many a 'few cm' is will determine if at 'point of entry' or beyond! - Bit of a grey area!

 

[tudore]

Whats his conscience got to do with it?

Ask yourself are you winging it to save time and money, or are you playing it safe? It's always worth asking yourself this question. On the one side you can maximise your profits, on the other you stay out of court for manslaughter.