Excellent run through of what it is. Thanks

Thanks for run through - nice video, well explained!

Great video as always Mike 👍🏼

Thank you. That was very well presented. Well done you. Infact first class.

Brilliant 👏 thanks 👌🏻

Can I test Zs on a lighting circuit with led fitting which lit up? Cheers

I really appreciate

The most important test 🙌❤

Very good videos

I think with your tester doesn't have to be a 3 lead test for low. Easier to use 2 lead low. Just change setting with F1 button.

Great content as usual. Keeping things simple, thinking about a teaching career when you're too old to be on the tools? Honestly if you lost any one then they need to go back to class. Best info for me was the quick summary on the fact different testers call it different things but the basics of hi and low (trip and no trip) and that most require 3 wire test on low.

Pro ❤❤🎉🎉

👍👍👍👍👍

What’s the motor whirring in the background?

1st view!

No volume

Why would be listen to you when you’ve only ever installed 1 earth rod?

Sorry, but stating that impedance and resistance are the same isn't the best approach in my opinion. Impedance is resistance to AC current and the resistance value is purely the DC component. From your distribution board out along the final circuit which is just a cable, then yes, the impedance and resistance will be the same as the cable has no reactive component to it. That is why it is just measured with a resistance meter. However, as you go back into the DNO supply from the distribution board and come to the transformer secondary winding, that does have both a resistive and a reactive element and the two added together will give the impedance. It therefore, must be measured with an AC Test Current. If you measured the the DC resistance of the earth loop, you would get a lower value than if you measured the impedance value. The impedance value is more reflective of the actual fault current, where as the DC loop measurement would give a higher fault current, that the system would not be able to supply in reality.