Zs readings on TT system

[067256]

Hi there,
In the process of testing a large property. TT system. Ra is 58.4 ohms so all good. But starting to test Zs and getting readings of 0.18 on sockets?
Why would this be?

 

[i=p/u]

Change it to tncs on schedules..

 

[telectrix]

bonding to gas and water, or someone has linked N-E.

 

[Richard Burns]

The bonding to the metallic services is providing a better earth path than the rod.
Or you have misidentified the earthing system and it is TNCS / TNS with a rod as well.

 

[i=p/u]

I earned £1000+a week the last two weeks Richard , and I may say thx to you for you patience over last few years on here, I'm getting good at this electrical stuff.....

 

[GLENNSPARK]

i`ll bet its a redundant rod....

which of course would now be considered an extranious conductive part....and as such is bonded....

so the old earthing conductor to it has now become the earth rod`s bonding conductor...if you like...

 

[Richard Burns]

I earned £1000 a week the last two weeks Richard , and I may say thx to you for you patience over last few years on here, I'm getting good at this electrical stuff.....

Well done, I have just done my tax and I earned £1000 (nearly) in the last year!
I must be a poor electrician!:aureola:

Thank you for your thanks and glad it has helped.

Just remember to keep getting better!

 

[SPARTYKUS]

Or... To be precise (i bet), the water pipe is directly linked to next doors', who have... A TN system.

happens every now and again.

so (I bet) if you disconnected the bonds and re-ZS'd it'd be alot higher!

obviously the above is not recommended unless you have sole control of the installation etc etc

 

[067256]

If this is the case then do I record this on the Eicr? Or is there further work?