boiler cross bonding

[jimjamjimajam]

Just had an enquiry from someone about boiler cross bonding of pipes. Just to clarify this is not needed for 17th edition

 

[Pete999]

Are the pipes classed as extraneous parts?

 

[jimjamjimajam]

Only incoming gas/oil and water have been bonded

 

[davesparks]

As with all bonding you need to carry out testing to ascertain whether the pipes are:
A- already in effective contact with earth.
B- extraneous/otherwise in need of bonding.
C- isolated from earth.

If A or B then no bonding required, if B then bonding is required.

Generally you will get good continuity between all pipes due to the metalwork of the boiler, but if in doubt then test it.

 

[Pete999]

View attachment 17_edition_factsheet_05.pdf
Have a butchers at this

 

[jimjamjimajam]

Thanks Pete999. I am aware that extraneous parts such as gas/oil/water need bonding. But in simple terms, provided this is done then we no longer need to cross bond all pipes at boiler as before 17th edition, correct?

 

[davesparks]

Thanks Pete999. I am aware that extraneous parts such as gas/oil/water need bonding. But in simple terms, provided this is done then we no longer need to cross bond all pipes at boiler as before 17th edition, correct?

I've answered this once already, you need to test the pipes to establish whether or not they need bonding.

 

[Deleted member 9648]

Thanks Pete999. I am aware that extraneous parts such as gas/oil/water need bonding. But in simple terms, provided this is done then we no longer need to cross bond all pipes at boiler as before 17th edition, correct?

There has never been any requirement to 'cross bond' at a boiler and there isnt now. All based on a myth which refuses to die. Main bonding of ECP's at point of entry and supplementary bonding if required in special locations.....nothing else.

 

[Geordie Spark]

Are the pipes classed as extraneous parts?

Whether they are or not they are all tied together by a sodding great metal plate at the entry point of the boiler!

 

[DNO]

Cross bonding, is the main bonding at points of entry of a premises, or as near as practical. The bonding is reqd irrespective of plastic incomers.

 

[trev]

Cross bonding, is the main bonding at points of entry of a premises, or as near as practical. The bonding is reqd irrespective of plastic incomers.

Are you absolutely sure of that?

 

[ipf]

There has never been any requirement to 'cross bond' at a boiler and there isnt now. All based on a myth which refuses to die. Main bonding of ECP's at point of entry and supplementary bonding if required in special locations.....nothing else.[/QUOTE

Some myths are quite are interesting, some quite amusing, others are just boring because they keep on raising their ugly head.

 

[Geordie Spark]

Are you absolutely sure of that?

Hello Son!!

wotcheor fettle th'day??

Myek sure ye keep that lad reet noo.

 

[ipf]

Cross bonding, is the main bonding at points of entry of a premises, or as near as practical. The bonding is reqd irrespective of plastic incomers.

hummmmm....I'm trying, honest!

 

[trev]

Hello Son!!

wotcheor fettle th'day??

Myek sure ye keep that lad reet noo.

How Fatha, Aam canny ye knaa. Ye n me stepma aareet?

 

[Geordie Spark]

Cross bonding, is the main bonding at points of entry of a premises, or as near as practical. The bonding is reqd irrespective of plastic incomers.

Oh dear........ this is not going to end well at all. :crazy:

 

[trev]

Thas mair Fatha, Ees on otha things aboot bondin.

 

[DNO]

"are you absolutely sure"

Oh yes, I know the man who wrote the book--and I have the book.

 

[trev]

So, in an instance where a piece of pipework has a resistance to the met of say 60k ohms you'd still bond it?

 

[Geordie Spark]

How Fatha, Aam canny ye knaa. Ye n me stepma aareet?

well I had a relapse earlier in the week and the vet gave me more meds and yesterday I was a lot better.

Tidyboiler came over yesterday afternoon & we had good curry and she stayed over until teatime today. Before she left I went with her shopping at Sainsburys and managed to drive there and back in the MR2 and walk all around the place without my walking stick and wasn't too tired when we came back home so that was a big improvement so I've had a truly great day,thanks.