TT off water main or tncs with no earth (Victorian house city centre)

[James Kinrosd]

Hi guys came across this today, Ze of 37 ohms, surprised me as thought it was a tncs- Victorian house, Db from 1989, no docs- could it be a TT off the water main? 10mm bonding to gas and another 10mm out of sight. The met on the rhs of tncs
block not connected to neutral- can anyone help me with some ideas? Cheers.

 

[Midwest]

Hard to tell from your pic, set up would suggest TT. Have you followed the route of the EC and see where it terminates, the head looks like PME, have you asked the DNO?

Just re-read your post, you say the earth is not connected to the neutral link?

 

[BOYD BARKLEY]

Hard to tell from your pic, set up would suggest TT. Have you followed the route of the EC and see where it terminates, the head looks like PME, have you asked the DNO?

Just re-read your post, you say the earth is not connected to the neutral link?

Try to get a PME terminal from the DNO or you could drive a new spike in directly below in the sub floor and convert to tt system,
then sell them a new board.

 

[westward10]

I know what I would do

 

[James Kinrosd]

EV disappears below floor to back of house possibly to water main. Rang DNO, they were not helpful- have to wait for an appointment. Earth not connected to neutral- inside the block, seals already broken. Checked neighbour's, his is the same but neutral connected to earth inside the block - looks like his is tncs and he had a 0.54 Zsat the kitchen ring..

 

[The Ghost]

ggg

 

[ruston]

EV disappears below floor to back of house possibly to water main. Rang DNO, they were not helpful- have to wait for an appointment. Earth not connected to neutral- inside the block, seals already broken. Checked neighbour's, his is the same but neutral connected to earth inside the block - looks like his is tncs and he had a 0.54 Zsat the kitchen ring..

Any sticker on the neighbours?

 

[James Kinrosd]

No it's even older....

 

[James Kinrosd]

Just wanted to know really if there was a practice 40-50 years back of using water mains as TT.....?

 

[ruston]

@James Kinrosd. A water pipe can be used with the owners permission .

 

[Taylortwocities]

A water pipe can be used with the owners permission .

Until it gets replaced with a plastic one, then you are stuffed.

 

[ruston]

Until it gets replaced with a plastic one, then you are stuffed.

There is a proviso about it's security , but I cannot remember it off the top of my head now lol.

 

[Rpa07]

ggg

If this were multiple choice @Vortigern, you would have failed having only got 1 out of 3 correct. The other answers were c and a by the way!

 

[BOYD BARKLEY]

Until it gets replaced with a plastic one, then you are stuffed.

It was common practise many moons ago to use the pipe as means of earthing . You still can with the owners permission which would be a pain to get and unreliable as pointed out,with constant upgrading etc.to plastic

 

[ruston]

It was common practise many moons ago to use the pipe as means of earthing . You still can with the owners permission which would be a pain to get and unreliable as pointed out,with constant upgrading etc.to plastic

It was common up here as there are a lot of TT systems .
A lot were in the colliery housing areas , the replacement plastic pipes left the old cast pipes intact , usually under the gardens , so fairly safe until the houses are demolished .
The last one I worked on many years ago the RA was 6 Ohms.