DNO's responsibility for TNCS

[electronicsuk]

ok. when your testing your Ze you test between p&e right. Inside the cut-out there is a neutral block and also an earth block. These two blocks are connected together by use of a copper bar. I've checked google for images but can't seem to find any. This is what i mean by testing to neutral. Your neutral is your earth on a pme system

It doesn't prove anything. Neutral and earth are linked at the sub, so you could easily get a reasonably low reading between N and E with, say, a TN-S supply. I also don't see how you would test 'Ze' between N and E - are you sure you don't just mean continuity on low ohms range?

 

[LoveRocket]

So you mean continuity testing between N and E on the service head? (As opposed to loop testing between P & E?)

Yes. If you got a reading of zero that would tell you that E was connected to N inside the head.

Are you a professional electrician?

 

[ricicle]

ok. when your testing your Ze you test between p&e right. Inside the cut-out there is a neutral block and also an earth block. These two blocks are connected together by use of a copper bar. I've checked google for images but can't seem to find any. This is what i mean by testing to neutral. Your neutral is your earth on a pme system

But any good Electrician will know that this alone will not confirm that the DNO's Neutral is rodded down at intervals for safety !!