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

Midwest

-

Nearly Esteemed

Arms

Joined

Mar 21, 2011

Messages

13,314

Reaction score

11,324

Location

Oxfordshire

• Feb 28, 2018

• #2

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?

 

Upvote 0 Downvote

B

BOYD BARKLEY

-

Joined

Jan 24, 2018

Messages

23

Reaction score

3

Location

SCARBOROUGH

• Feb 28, 2018

• #3

Midwest said:

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?

Click to expand...

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.

 

Upvote 0 Downvote

westward10

Staff member

Admin

Esteemed

Supporter

Joined

Jul 15, 2016

Messages

22,270

Reaction score

28,423

Location

Northamptonshire

• Feb 28, 2018

• #4

I know what I would do

 

Upvote 0 Downvote

OP

James Kinrosd

-

Joined

Jun 2, 2017

Messages

14

Reaction score

1

Location

London

• Feb 28, 2018

• #5

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..

 

Upvote 0 Downvote

T

The Ghost

• Feb 28, 2018

• #6

ggg

 

Upvote 0 Downvote

ruston

-

Mentor

Nearly Esteemed

Arms

Supporter

Joined

Nov 19, 2010

Messages

6,196

Reaction score

4,971

Location

Northumberland

• Feb 28, 2018

• #7

James Kinrosd said:

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..

Click to expand...

Any sticker on the neighbours?

 

Upvote 0 Downvote

OP

James Kinrosd

-

Joined

Jun 2, 2017

Messages

14

Reaction score

1

Location

London

• Feb 28, 2018

• #8

No it's even older....

 

Upvote 0 Downvote

OP

James Kinrosd

-

Joined

Jun 2, 2017

Messages

14

Reaction score

1

Location

London

• Feb 28, 2018

• #9

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

 

Upvote 0 Downvote

ruston

-

Mentor

Nearly Esteemed

Arms

Supporter

Joined

Nov 19, 2010

Messages

6,196

Reaction score

4,971

Location

Northumberland

• Feb 28, 2018

• #10

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

 

Upvote 0 Downvote

T

Taylortwocities

-

Arms

Supporter

V.Nearly Esteemed

Joined

Dec 12, 2009

Messages

3,129

Reaction score

3,451

Location

Oxfordshire

• Feb 28, 2018

• #11

ruston said:

A water pipe can be used with the owners permission .

Click to expand...

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

 

Upvote 0 Downvote

ruston

-

Mentor

Nearly Esteemed

Arms

Supporter

Joined

Nov 19, 2010

Messages

6,196

Reaction score

4,971

Location

Northumberland

• Feb 28, 2018

• #12

Taylortwocities said:

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

Click to expand...

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

 

Upvote 0 Downvote

Rpa07

-

Arms

V.Nearly Esteemed

Joined

Oct 23, 2012

Messages

4,171

Reaction score

5,027

Location

Bristol

• Feb 28, 2018

• #13

Vortigern said:

ggg

Click to expand...

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!

 

Upvote 0 Downvote

B

BOYD BARKLEY

-

Joined

Jan 24, 2018

Messages

23

Reaction score

3

Location

SCARBOROUGH

• Feb 28, 2018

• #14

Taylortwocities said:

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

Click to expand...

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

 

Upvote 0 Downvote

ruston

-

Mentor

Nearly Esteemed

Arms

Supporter

Joined

Nov 19, 2010

Messages

6,196

Reaction score

4,971

Location

Northumberland

• Feb 28, 2018

• #15

BOYD BARKLEY said:

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

Click to expand...

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.

 

Upvote 0 Downvote