Ze reading

[1shortcircuit]

I was reading a Napit factsheet today regarding Ze readings and on it is a diagram showing the earth disconnected from the MET with the earth lead from the tester attached to it with a croc clip, and the L and N leads/probes on the L and N terminals on the incoming supply. Isn't that testing all three wires to the supply?
I tested mine as shown and got a reading of 0.18ohms. Seems adequate enough to me.

This is the part I was referring too which is discussing Ze

I think a forum search would have brought up a more recent thread to add to:thumbsup

 

[Jimmy Boy]

To be fair, he's included the EFLI value at 0.46 Ohms, he just doesn't have a clue what it means or what the recommended upper limits are.
Neither BS7671 nor ESQCR regulations make a maximum limit on Ze values but there was an 'engineering agreement' to attempt where possible to use the commonly known upper limits (0.35 etc etc).

Nor do I please explain ! ha ha
J