A lot of people are learning a lot from you Dave. As always, these videos are an invaluable addition to the tool box. The time and effort you put in to assist others is above and beyond. Well done mate!

Hello Dave, When the insulation resistance for one circuit is 1 Mega ohm , it will pass. But, of course the parallel resistance for whole installation would be less than one and a fail. So considering the amount 1M ohm in the standard as a pass looks weird.

I have never regreted subscribing to it...

Can you IR test and entire board of its populated solely with rcbos? I’m guessing not but worth asking? Thanks

Pl show the video for 3 phase system.most od people are working in industry.make short one .one subject per video

Hi Dave excellent video again, my mental toolbox has indeed been added too. just a couple of minor queries that im struggling to fathom. The training provider i attended recently did the sequence of IR tests in the following order, Neutral and earth, Line and earth,Line and neutral. Ive noticed this sequence is different from yours so does it matter Dave. Also and this may be a stupid question when you say that you connect the line and neutral via a wago or connecting block in order to protect dimmer switches and test between these 2 and earth bar and you should get 0 volts, how does that test the cables if its 0 volts and not 500 volts. Brilliant video by the way I will watch it again it really is fascinating this electricity thingymebob lol.

Hi Dave, wonderful content. So if i was carrying out an insulation test for sockets for example, would i just replace usb sockets with standard ones but can leave bulbs and fire alarm connected for as im only testing for sockets and vice versa? Thanks

What an amazing video broke the testing down into bite-size pieces and made it easy to understand thank you very much

If the mft gives a reading more then the reader can count, how to you do the parallel resistance calculation as you don't have the actual amount? It will just say something like above 200 M ohms. BTW that you, your videos helped me pass my 18th edition

Hi Dave. I love your videos. Very helpful. Im a bit confused over the reciprocal method in your video 2391 Assessment practise 1 and the reciprocal method in this video. They look different, one is using little r1 and the second one is using big R1. The use of rn is also confusing me between the two formulas. Please help. Many thanks, Craig

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.

Big thanks , not rushed and very well explained👍

I love these videos, the 18th edition one has really helped. Thank you very much

Following on from ring fault finding and ring circuit socket sequencing this is great 👍

Great as usual Dave 👌 👏 👍

You are doing a great job, thank you!

Thanks so much Mr ward for such an educative lesson.

Excellent description and methodology

Another brilliant and informative video 👍

Just what I needed. Thankyou.