Advice on supply please!

[bodders22]

Hi all,
I've just started a rewire on a 1920's ex local authority house. The supply is an underground cable with sheathed earth with a fairly new service head(BS1361), so I pressumed tns supply. On futher investigation the earth webbing goes into the neutral on the supply side and at the moment there is no earth to property from this(only off of lead water pipe).
Is this now classed as a tncs? and can I earth from neutral block on supply?
There were no seals so i've taken covers off to show you, Apologies for my ignorance but I've not come across this before,thanks in advance for any help!

 

[Engineer54]

I think in situations such as these, it may sometimes be a good idea to ask your client if he could ask his neighbours if you could have a quick look at there earthing arrangement at the head position. It could in some circumstances, answer a lot of questions....

 

[bodders22]

Good Idea but I'll have to try a few doors down as the next door neighbour is a 6ft transexual with a beard there aint no way I'm going in there!!

 

[oldtimer]

Yep looks like TNS now if the braid is giving you 0.14 but "who" linked it out with the neutral ? So get DNO out to resolve might be worth getting a 11497 from Screwfix as to get ready a MET.

 

[Geoffsd]

6ft transexual with a beard there aint no way I'm going in there!!

Too tall for you?

 

[paturback]

Yep looks like TNS now if the braid is giving you 0.14 but "who" linked it out with the neutral ? So get DNO out to resolve might be worth getting a 11497 from Screwfix as to get ready a MET.

sorry but whats that?

 

[oldtimer]

sorry but whats that?

It the MET block

 

[bodders22]

Hi all just a quick update. I've knocked on a few neighbours doors today and checked out their supplies (yes even next doors! and I came out intact!) A few had a complete new supply that was tncs,and a couple like the house I'm on with the earth braid going into the service head, but theirs had a 16mm main earth coming out into a met, so looks like dno's converted them to tncs anybody heard of this before? I'm going to try to get confirmation tomorrow.