Bonding of cast iron toilet waste??

[Underpaid]

Has anyone ever bonded a cast iron waste pipe? and if so what were the circumstances? Can u buy some kind of freaky long bonding clamp? As it states in the regs not to join two clamps together.

 

[Deleted member 9648]

... but if there is no continuity between t'pipe in t'ground and t'pipe entering t'house then the cast iron is not an extraneous part!

Then it wouldnt need bonding....
There is a difference though between no continuity and a more likely poor continuity.

 

[Deleted member 9648]

I’ve just looked in the 16[SUP]th[/SUP] OSG. Bonding a metal soil pipe in a bathroom was a requirement.

I’m going to make a wild guess being as the OP has cleared off, he’s found a bonded pipe doing an inspection and it’s not in his IET comic book.

No it wasn't.
It was and is a requirement to bond extraneous conductive parts,of which a metal soil pipe may be an example.
The regulations have NEVER required that a metal soil pipe is bonded if it is not extraneous.

 

[GB.Kayak]

First i isolated the installation, then using an insulation resistance tester, connect one lead to the main earth terminal and the other lead to the soil pipe, tested at 500v and my reading was much less than 23,000 ohms meaning that the soil pipe is considered an extraneous conductive part and needs main bonding

Given your description, I agree!

 

[Knobhead]

Look on page 29 of the 16th OSG

 

[davesparks]

First i isolated the installation, then using an insulation resistance tester, connect one lead to the main earth terminal and the other lead to the soil pipe, tested at 500v and my reading was much less than 23,000 ohms meaning that the soil pipe is considered an extraneous conductive part and needs main bonding

Did you disconnect the earthing conductor before carrying out the test?

 

[jonny705]

Years ago worked in my sisters house in Kent, it was a old farmhouse.

The first time I had encountered a TT system , and never have since.

I had to put in multiple rods to get Zs down and local electrician came round, used to working in that area, tested them with his probe meter into ground.

But their was a cast soil stack , and he made me bond it like a main gas/water pipe, as remember having to run a very long cable through the house back to the board and it was not an easy run.

Never knew you could get massive earth clamp, but local electrical place said it was really common in that area.

Also made me supplementry bond it to rest of Bathroom pipework.

But as never encountered it since , never thought about it, until seeing this thread.