Discuss TT off water main or tncs with no earth (Victorian house city centre) in the Electrical Forum area at ElectriciansForums.net

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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.TT off water main or tncs with no earth (Victorian house city centre) IMG_20180228_104819916 - EletriciansForums.net TT off water main or tncs with no earth (Victorian house city centre) IMG_20180228_114411875 - EletriciansForums.net
 
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?
 
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.
 
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..
 
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? ;)
 
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.
 
Many thanks for your replies guys! Even if left as is, or with an additional earth spike, am thinking the board would have to be updated to protect the circuits on the right hand side that only have a 100ma RCD to bring them under a 30ma RCD.....
 
Many thanks for your replies guys! Even if left as is, or with an additional earth spike, am thinking the board would have to be updated to protect the circuits on the right hand side that only have a 100ma RCD to bring them under a 30ma RCD.....
 
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.
Innovative more than informative, rus. I like that.
Common sense really, though, as you say.
 
Yes ' The death of common sense ' lol.
The ground was so wet around these houses anyway even with rods the readings were quite good. They are still standing and in use to this day.
Not by Miners though . ( cap intended) :)
 

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