Fault finding on a Ring Final Circuit using R1+R2 & R1+RN, the only way to prove polarity AM2 AM2S 

From a recently retired industrial electrician of 50 years i thought your run through of testing a final ring circuit was spot on mate

I'm not an electrician, I just have an interest in learning anything and everything. This was so well explained and laid out. I understood it straight away. This is the 3rd or 4th video I have watched regarding ring circuits and only with this one did I get that 'light bulb' moment. Thank you for your effort.

Excellent video. I've got my AM2 coming up in the a few weeks and this really helped to explain what is expected. So glad people like yourself take the time to create content as informative as this for revision. Thank you.

Great Video, I recently took the 2365 L3 (I was an Electrician years a go and retuned to it back in 2017 and wanted to update all my qualifications and possibly get a Gold card) Whilst the L3 course had a lot of fault finding on the practical there was only a little on the theory or approach and that was in a slightly different way! They really need to add this video to their course as soon as I saw this everything they taught made complete sense (and it did not at the time)! Whilst I know how to fault find and fix Rings etc I am always looking for additional ways of solving problems and this was just brilliant. Every Apprentice should watch this. Also I completed a Domestic installers course (No fault finding taught at all) and then went on to complete the 2365 L2 & L3 and they did not show R1+Rn testing on any of them. I only tested R1 & Rn when I took the 2391-52 course, but could not understand why this was not taught at the more basic levels. When I did start testing R1+Rn on my 2365 L2 course the instructor told me I did not need to do it for the course! (It was more about completing all the tasks within the time).

You can tell when a teacher actually understands what he's talking about rather than just memorising the patter.

Keep up the good work mate! Really appreciate your effort and time spent on these videos. I wish I had you as a tutor, even so I managed to learn so many things from your videos.

Very well presented well done. I am not an electrician I trained on electronics C&G 224 parts 1 and 2 TV / Radio and control systems we did the lot digital and analogue . Worked as a fire alarm commissioning engineer for many years and as an apprentice my mentor told me to always remember 1 leg of 1.5mm cable is approximately 12 ohms (11.86 rounded up) Long ring circuits to you loops to us 😂 . They could be anything up to 1.5km so 18 ohms per leg. Used to use 1.2 ohms per 100m run for tracking down shorts to earth and more than a few times I was spot on and got the nickname the earth fault kid. Miss my mentor he passed away a few years ago what a top bloke taught me so much. Great to see you using maths and readings to assist fault finding all makes perfect sense to me well done.👏

Very good delivery of information. Precise concise short and simple to understand. Thanks

Thank you for sharing your work experience, and I hope there will be a traditional Chinese translation. Thank you🙂👍🙏🙏

Thank you for your advice, I would of never got through my college without you. God bless and hopefully one day I'll get to buy you a pint 👌

Thanks Adrian, Brilliant video. Has really helped me visualise the Figure of 8 and appreciate how the R1+RN test is critical to proving polarity and its role in facilitating initial verification fault finding. Top level content sir!

Many thanks for your valuable time to give all this good information to us really help me to understand better 🙏🏻🙏🏻🙏🏻

Thank you to uploading this kind of video with great explanation of fault finding and reverse polarity .

It’s wonderful to have someone like you taking your time and uploading them thank you Adrian . I will have my am2 exam in few weeks time, so can I ask you about short circuit faults please, I was told that on the am2 exam the short circuit is only between live conductors not earth. Does that mean the fault is only between lives never lives to earth? Appreciate your help in advance

Very enjoyable and super informative

Excellent video here. Keep the testing/fault finding videos coming please.

Always appreciate these vids

Thanks, absolutely brilliant work

Great information Arrian Thank you I have my 2391 next week so going over all test on RU-vid

This video is perfect! I’m glad I’ve found it! Subbed

well explained video with good solid reasoning and explanation, just a couple of points, neutral IS a live conductor as is the LINE, it is fundamentally incorrect to call the brown wire the live conductor because the neutral is also a live conductor, it should always be line and neutral, also electrons absolutely DO NOT flow around the circuit, the current does but not the electrons, you could refer to circuit continuity in the Line (or Neutral or cpc) conductor or the particular figure 8 you have connected. I believe it is important to get all new apprentices and new electricians to use the correct terminology, on the bright side I was please to hear you refer to a "ring final circuit" and not the more usual and incorrect term "ring main"

Hello Master nice to see you back.

Very clear explanation 👌

Great vid as usual

That was very good information

love the video hope you do some more fault finding videos cause I'm gunna need this for when I start level 3 not working at a spark at min so it'll be good knowledge

Cheers Adrian

Awesome 👌

Proper testing like this a lot

Great!!!👍

Genius...

Great vid mate , I’m doing my Am2S in a few weeks , any more fault finding videos ?

Awesome stuff mate, Thank you! May I kindly request a video on how to interpret electrical drawings please? I just struggle to comprehend most of the time- especially when I’m on a construction site. Just feel lost to be honest! Your help would be greatly appreciated! Cheers again.

What would be nice is to show a socket on the on a different circuit where we would obviously have no reading throughout.also a plug in voltage tester cant tell you if its an actual ring or not.nice video

You have to still create a box for R1+RN on test sheet for AM2

Excellent video very helpful many thanks please keep these videos coming

Wouldnt a quick whip round with a KEW socket tester show immediately if there were any reverse polarity issues. The KEW LOOPCHECK 107 seems like a new generation of simple fault finding devices Super quick??? Yes, you cover this exact point v thoroughly at the end of the video. However, isn't it a quick check towards faults in the system, guiding you to where you should pay attention? Thoughts please? Genuine question. Tky. Ps. V informative and helpful video. V thorough. Excellent!

So how would this actual test look? Are you taking socket fronts off or are you plugging in an MFT 'socket' attachment with the 3 leads plugged into it and doing it that way?? Ps great stuff this channel is amazing.

It’s a great explanation but in your AM2 you’d only have one fault not multiple to look for

Hello, thank you for the video. I might be missing something here but why are the three wires swapped on each socket?

Is it right that main bonding conductors dont have to be under 0.05 they just have to be relevant reading to the length of the cable. Did my inspection and testing the other day and the assesor said that comment?

👍👍👍👍👍

Great video, Question. Why not just visually check for polarity ?

The 0.05 tolerance is surely due to cable and connector resistance tolerances!

What would happen in theory if you went from the CU with a CPC throughout the circuit and a line conductor to a socket came out in neutral to the line of another socket out the neutral so on until you get back to the CU and connect to the neutral bar? I know it’s dodge but just got thinking about it would it work? 😅

cant you just plug in a socket tester? not being snide, as Im not a spark. Just interested

0.05 tolerance is allowed because of older analog MFTs, newer MFTs are digital, more precise.

Lower case R...😁

In your AM2 you wouldn’t get two faults in the same scenario? You’ve just told me there is a fault between two sockets and a fault on another? 12:30

Exellent vid thanks..