Discuss Testing.. Never goes right.. in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net

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TNCS - 0.35
TNS - 0.8
TT - 1667 although 200 is acceptable but it could be unstable and so should ideally be under 100.

Page 11 OSG


Cheers J

I've measured Ze on a TT as 0.27

Would you say ive messed up somewhere on the test as this seems VERY low ???
 
Cheers J

I've measured Ze on a TT as 0.27

Would you say ive messed up somewhere on the test as this seems VERY low ???

If you positively isolated the Main Earthing conductor from the Earth bar and main bonds then you will probably be reading through a parrallel path close to your earth rod...maybe a water or gas pipe....if this is your reading then record it on your test sheet but note down your reason.
 

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