Measured Ze, measured R1 + R2 = 'measured' Zs

[ian.settle1]

How about lighting 10 metres high?

Wouldn't you be 10 metres high when carrying out your dead tests?

 

[Simonslimline]

Why better practice?
How about lighting 10 metres high?
Surely that would be bad practice to do live tests at height, when the test is not required.
How accurate is your meter?
I can guarantee that different makes will give different results when measuring a Zs though a RCD.
All MFT's have to calculate the result when doing a low current test, some are better than others at it, so it is rare to get a truly accurate result from a measured Zs low current test.

I cant really see why to be honest. Safety first as usual, same as doing a live test on the ground!!!


Each to there own opinion though i guess.