TN-S Earth clamp??

[La Poste]

What are your thoughts on this?

ELI reads 0.15 Ohms, the lowest I have ever seen but I haven't seen that many.

Thanks.

 

[silver surfer]

Looks like theres another CU elsewhere as being as there is another set of double insulated tails in the henley block.

 

[La Poste]

Here's a few more pictures.

I really appreciate the input guys so thanks.

I shall be going back for further investigation soon.

 

[VoltzElectrical]

I've never dealt with DNO's, but can't he call them to upgrade the meter to a digital one, (done free round here last couple of years) and install an isolator at the same time? or is this just showing my ignorance??

 

[Deleted member 19807]

I've never dealt with DNO's, but can't he call them to upgrade the meter to a digital one, (done free round here last couple of years) and install an isolator at the same time? or is this just showing my ignorance??

Problem is that if its TT on there records they will remove the clamp and disconnect the supply until all circuits are rcd protected and a rod has been installed.

The op could ring the dno and see if they have any records as to earthing arrangment at this property, they should have records for all properties in thier area (good luck with this one)

 

[Knobhead]

It will have been TN-S, it’s a paper lead cable. The give away is the way the cable crotch is taped, that’s not a new fangled heat shrink termination. As I said in a previous post for gods sake DO NOT play about with it. The separate L / N blocks are typical of early 50’s supplies. My first house had them.

 

[La Poste]

I won't touch it but I do think the tiny little screw securing the main earthing conductor to the clamp looks a bit unreliable (I think that's an under statement).

It would be nice if I could find a way of making this connection more secure without risk to the cable itself.

 

[La Poste]

While we are on the subject this is my parents house.

TN-S and the same sort of clamp although the main earthing conductors look much more secure.

ELI 0.3 Ohms, the transformer is on a pole in the field out back.

If the clamp on the previous post and property looked like this I would feel a bit better about it.

 

[Knobhead]

That’s an 0BA screw and nut. Just crimp a 16mm X 6 lug on to earth cable. There’s enough “waggle” in the tape to stop you doing any damage.

 

[Engineer54]

It will have been TN-S, it’s a paper lead cable. The give away is the way the cable crotch is taped, that’s not a new fangled heat shrink termination. As I said in a previous post for gods sake DO NOT play about with it. The separate L / N blocks are typical of early 50’s supplies. My first house had them.

You could well be right about it being tape. If it is tape the installer made a super job of amalgamating it, looks as good as a heatshrink trouser breakout.

Oh and heatshrink breakouts are not new, they have been about before i came into the industry. All of the multi core cables entering the switchboards in my old company were fitted with them. They were made from a different material than they use now, looked and felt like a rubber compound in those days. and were sized to the specific cable size unlike today where a size fits numerous cable dimension sizes.

 

[La Poste]

I think a bit of trunking protecting the cable might be a good idea.

Stop the house wife bashing it with a suitcase hopefully.

It sounds very fragile.

But I want to phone the DNO just to see what sort of earthing they say the house has got.

I'll let you know what they say.

Thanks.