Insulation Resistance Part 1 - Why do it?

Basic theory The reason why we carry out this important test

[@no_short_circuit]

Thanks for taking the time to share your knowledge. As an adult learner this is one of the best explanations of IR that I've seen on UA-cam. Looking forward to Part 2

[@JPElectric]

Thanks GrumpyGrampa, Its kind comments like yours, that makes the work I put into these worthwhile

[@danielteyehuago1633]

​@@JPElectricPlease what is the test during for the IR.
At what instance do you injected more than 500V

[@danielteyehuago1633]

Wow! This is video very informative and the best tutorial on the topic for me so far. I really appreciate it. Thanks for sharing it with us.

[@pin7706]

Amazingly good instruction

[@maysasaeed7964]

شكرا فعلا استفدت

[@ronaldomac4918]

Thanks for this very instructional video, well layed out and easy to follow :)

[@JPElectric]

Thanks Ronaldo. Really appreciate it.

[@davidpatterson1574]

Excellent explanation of insulation resistance testing, and graphics

[@JPElectric]

Thanks David , really appreciate your comment

[@mikeadler434]

👍👍

[@electricalstuff259]

AMAZING video

[@JPElectric]

Thanks for watching electricalstuff259

[@J3envenuto]

So useful, thanks

[@JPElectric]

Thanks very much J3envenuto

[@jbl2270]

Great graphics! Thank you. IR testing does not give an indication of conductor corrosion or if its ability to conduct electricity is adequate right? Is this test enough to give tenants confidence that main cables powering a house is satisfactory?

[@knoxieman]

brilliant explanation!

[@JPElectric]

Thank you knoxieman

[@awalsakibmohammed3985]

Beautiful presentation

[@JPElectric]

Thank you awalsakibmohammed3985

[@olly7673]

Thank you for your efforts in producing this, it's appreciated. Just like your previous ones, it's very well presented and full of theory and real world content. I'm looking forward to the next episode, hopefully not too long away, as I am keen to see where you're last scenario of false positives etc is going as the AV pictures made me think where you were going. Great production. I've got the 1741+, how do you rate it?

[@olly7673]

Also..... what red lead are you using with the crocodile clip for the resistor clip?

[@JPElectric]

Hi Olly , thanks for the nice comment. Im working on the next one now so hopefully in a few days. 1741+ is a good meter. Its had to go back to Megger though, as it had a fault. The two lead low current test, is a great function. The lead is the one with the test button on it. You need to press the test button when doing IR so using the probe with the test button makes it easier.

[@elektrojen7347]

Thanks very helpfull

[@JPElectric]

Thanks ELEKTROJEN, appreciate the comment

[@salarbadeel4471]

What is the test voltage needed for a 4160 3 phase motor, and what is the minimum acceptable IR for that ?

[@unknownhours]

Look it up in the appropriate standard. IEEE 43 is a good one if you don't know.

[@ww-sd9pz]

Very interesting, surprised to see arcing of two 1.5v batteries.

[@JPElectric]

Thanks for the comment w w. That arc was caused by two 1.5v batteries. It did go through a voltage multiplier though to get enough voltage to cause that effect. I wanted to highlight the fact is was battery only, as I did not want people to think it was mains power, and try it for themselves.

[@mathman0101]

Nice graphics what software do you use for that?

[@JPElectric]

Hi Math Man, I use illustrator and photoshop.

[@l.hughezz]

why would 23mA trip a 30mA rcd?

[@JPElectric]

Hi Leyton. RCDs are sensitive devices, and some more than others. On a ramp test, which is a test which gradually increases the 'tripping current' I generally find a 30mA RCD operates around 25mA.

[@michealtran3636]

Thank you for your guide very important

[@JPElectric]

Thanks for watching and commenting michealtran3636