Earth fault loop impedance testing - ZS

Yo!

In this video i run trhough the full process of earth fault loop impeadance testing and about of the theory behind the ZS test.

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The works carried out in the video and the opinions shared are my own, and not representative of the associates and companies in the video.

This content is purely for entertainment purposes and is in no way a "how to", tutorial or educational video.

Please consult an electrician when dealing with any electrical installations.

#electricianlife #electrical #electricalengineering

[Ibrahim-vttz]

Thanks Mike
Brilliant explanation
You are great ❤❤❤❤❤❤ thank you. God bless you

[looking]

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.

[staypufttechtank]

Thanks for run through - nice video, well explained!

[TheHomeent]

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.

[SSSwilliams]

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

[pinchermartyn]

Excellent run through of what it is. Thanks

[gordonkerr]

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

[eddtheduck]

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

[three-phase]

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.

[PHealey]

What’s the motor whirring in the background?