Ze 8.34

[tester11]

I am away to start testing a shop which has a ze of 8.34 and has no rcd protection on any circuits, should this be code 1 on condition report and should I shut off power and install a tt system until an earth can be provided by supplier. ??

 

[trev]

Do you know that it's not already a TT because it doesn't sound like you're too sure what's going on there earth wise.

 

[Strima]

What are the earthing arrangements?

 

[trev]

Let me get this straght, you've measured the Ze but you have no idea what the earthing arrangement is?

 

[tester11]

Tns 3 phases,clamp round old supply cable which has the metal sheath under the cloth type material, tried testing directly on to the supply cable sheath aswell as on clamp both around 8.4

 

[Deleted member 26818]

No it would be a code C2, as it's a potential danger, not an immediate danger.

 

[tester11]

Course I know what it is Do u know think if it was tt system I would be pretty happy with that reading !!!

 

[Strima]

On a lighter note, I had a Ze of 0.01 yesterday and that's testing it properly!!!

 

[trev]

Ok given what it is, it's the responsibility of the DNO to maintain the earth they provide so get on the phone to them but be prepared to spend a very long time explaining the problem to a bunch of numpties who have no clue what you're talking about

 

[Deleted member 26818]

You need to contact the DNO, and get them out to sort it.
Failing that, install an upfront 100mA time delayed RCD.

 

[loop3]

Ì you in london theyll probably charge you heavily for to fix it or tell you to supply your own earth rod. And 0.01 ! That's low. Either pme, joint box where e and n are connected or that house is right next door to a secondary sub.

 

[thebigcheese]

Pretty high PFC with that reading I bet!

 

[tester11]

No am up in Scotland al phone sse the morrow see wat there saying to it, cheers

 

[richy3333]

Which area of Scotland?
And you didn't use a Megger 1700 series on 2 lead LOW did you by any chance? (I know it's obvious but thought it best to ask).

 

[Amp David]

Course I know what it is Do u know think if it was tt system I would be pretty happy with that reading !!!

Dunno, would you, I know some who wouldn't be :ihih: !

Its a DNO job anyway