AAaaahhhhh. The Bonding Question Again.

Do we main bond up an installation if a new gas boiler is to be installed when the old one is removed?

I don't understand. What has a new boiler got to do with Main Bonding requirements?

What are extraneous-conductive-parts, and what are not?

See Part 2 in BS7671.

Now, to put a spanner into the works, do any issues arise if the copper pipes are "bonded" with solderless copper bonding?

No.

Zoomup:

Now, to put a spanner into the works, do any issues arise if the copper pipes are "bonded" with solderless copper bonding?

Zoomup:

Do we main bond up an installation if a new gas boiler is to be installed when the old one is removed?


What are extraneous-conductive-parts, and what are not?


Now, to put a spanner into the works, do any issues arise if the copper pipes are "bonded" with solderless copper bonding?


Otto von Guericke would have known this for sure.


Over to you?


Look......




Z.


 

geoffsd:

Do we main bond up an installation if a new gas boiler is to be installed when the old one is removed?

I don't understand. What has a new boiler got to do with Main Bonding requirements?

What are extraneous-conductive-parts, and what are not?

See Part 2 in BS7671.

Now, to put a spanner into the works, do any issues arise if the copper pipes are "bonded" with solderless copper bonding?

No.

 

We had a question about this matter recently. Re. The need for main bonding if it is not present and a new gas boiler is installed.


Is this glue electrically conductive or not? At first glance we may assume that copper pipes are electrically continuous but in reality may not be. So some runs of copper pipe may be earthy and assumed to be bonded but due to the insulating properties of the glue, if it is indeed so, may not be bonded.

 

Chris Pearson:

Zoomup:

Now, to put a spanner into the works, do any issues arise if the copper pipes are "bonded" with solderless copper bonding?

Leaks I should think. Who in his (or her) right mind would glue water pipes together? ?

 

Apparently this copper pipe glue is increasingly being used in industry by plumbers and heating engineers alike. No heat required.

geoffsd:

We had a question about this matter recently. Re. The need for main bonding if it is not present and a new gas boiler is installed.


Is this glue electrically conductive or not? At first glance we may assume that copper pipes are electrically continuous but in reality may not be. So some runs of copper pipe may be earthy and assumed to be bonded but due to the insulating properties of the glue, if it is indeed so, may not be bonded.

 

I have said in another thread that the Main Bond is an electrical matter and nothing to do with the working of the boiler.


As for the 'glue', it does not matter whether it is electrically continuous or not as long as the pipe is bonded at its point of entry.

The pipes are not generally treated as Exposed-Conductive-Parts so don't need to be earthed. The boiler to which they are connected will be earthed.

It would be better if all the joints were insulating.

 

 

The copper pipes may be considered to be extraneous-conductive-parts if they are buried in the floor though. So there may be a section of copper pipe main bonded at the point of entry into the building,

then an electrically insulated section by insulating glue, then a real earthy section, all simultaneously accessible.

Not good. There could be dangerous Voltages between copper pipe sections, those P.M.E. bonded and those with true earthy connections.

geoffsd:

The copper pipes may be considered to be extraneous-conductive-parts if they are buried in the floor though. So there may be a section of copper pipe main bonded at the point of entry into the building,

Yes.

then an electrically insulated section by insulating glue, then a real earthy section, all simultaneously accessible.

That doesn't matter. 

Not good. There could be dangerous Voltages between copper pipe sections, those P.M.E. bonded and those with true earthy connections.

But the true earthy ones should be bonded so at the same potential.