2391 - RING CIRCUIT TESTING - RESISTANCE - R1+R2

[@241mrmark]

This is the best series by far - clearly explained. Brilliant.

[@learnelectrics4402]

Glad you think so, thanks for watching. Dave.

[@nigelconnor2460]

Hi there. Just wanted to say thanks very much for all your videos and presentations. Im just after achieving my 2391 and your video tutorials were a massive help in my understanding and especially the maths end. Keep up the good work. Thanks again!

[@learnelectrics4402]

Great news that you passed. well done and worth the effort. If the videos helped in a small way then that is great. Keep learning, its a good trade to be in, it's taken me around the world working. Lots more to come. Dave.

[@THECARKUS]

Superb content again! I got 100% on my 18th edition with your help and now I am working towards 2391. There is very little good specific content for 2391 about. I am sure that anything you create would be very popular! Thank you again!!!

[@learnelectrics4402]

Thanks Mark. Yes there will be plenty on 2391 over the next few weeks. Thanks for supporting the channel, it is appreciated. Dave.

[@ot7g8uoggggggggggggg]

As always another excellent video Dave much appreciated all the effort you put into your videos 👍

[@learnelectrics4402]

Thanks Naveed, your comments are really appreciated. Dave.

[@SKayGB]

GREAT VIDEO 👍

[@learnelectrics4402]

Glad you enjoyed it, Dave.

[@pinchermartyn3959]

Wow. Thanks. Your videos are doing such good service to the electrical industry. You are a terrific teacher.

[@learnelectrics4402]

Nice of you to say so and it makes the effort worthwhile. Thanks for watching. Dave.

[@Roq-stone]

You gave away all the tricks that could be pulled on the exam day or during work situations. Very valuable for safe working.

[@learnelectrics4402]

Happy to help. Thanks for watching and good luck. Dave.

[@gregmcallister4862]

Should be a common practice

[@avantgarde70]

Thank you for your careful and deliberate explanation Dave.

[@learnelectrics4402]

Any time, thanks for watching - appreciated. Dave.

[@lucapuzzoli8363]

In terms of explanations and understanding I find this the best channel. I'm a new learner! Thanks 😊

[@learnelectrics4402]

That's really nice of you to say, thank you Luca. Thanks for watching, lots more to come.

[@fairisfairfairisfair9788]

Great video again mate...much appreciated. Love the additional advice too

[@learnelectrics4402]

Glad you enjoyed it, thanks for watching.

[@teyronnewreality]

Fantastic more confident with this video 😀

[@learnelectrics4402]

Excellent Teyron. That's exactly why I made them. Thanks for watching. Dave.

[@gregmcallister4862]

Great content, for beginners to experienced electricians

[@learnelectrics4402]

Thank you. I appreciate the comments. Dave.

[@NOELTM]

@learnelectrics4402 Hi there. @12:30 you say when doing the socket test " .. they should all be the same value within a very small fluctuation.." Is there a guideline for what this "very small fluctuation" can be? For instance if the expected reading was 0.19 ohms and testing the sockets the results were, 0.20 0,19, 0.17, 0.20 would that be acceptable? The reason for asking is to have an idea at what point would a reading that is different to the calculated one would warrant further attention. Thank you.

[@learnelectrics4402]

Yes, that's about the right spread. What you don't want to see is 0.19, 0.19. 0.12, 0.19, where there is an obvious difference. A lot comes down to gut instinct, what I call the Policeman's nose - something isn't quite right here. thanks for watching.

[@NOELTM]

@@learnelectrics4402 Thank you for your fast and helpful reply. For a newbie like me, it enables me to build my confidence.

[@AngelaPeters-fy1tc]

Superb and so easy to understand with yourself Dave at the helm. Do you have a video on the explanation of parallel and series circuits as i never thought of a radial and a ring circuit in that way. I think the total resistance of a parallel circuit is always going to be smaller than the value of the smallest resistor in the circuit but i would like to try and understand the reasoning behind this otherwise im only relying on memory. Im 53 now and ive done and passed my 18th edition,part P and the 2391 at an electrical training centre last year, but because im not actually working in the industry i fear i may lose the knowledge that i worked so hard and studied for so these videos are a real massive help for me to keep brushing up on. im hoping to get some practical experience as a sparks mate even an odd day here and there as i find electrics fascinating and have a real passion for. Thank you so much for taking the time to make these videos Dave very much appreciated.

[@learnelectrics4402]

Yes we do Angela. Have a look at this video on Ohms Law and parallel circuits. There will also be a followup video on series/parallel circuits very soon. Never stop learning, there are loads of folk around your age who are taking up electrics and they've always been a pleasure to teach. A thousand small steps and you will get there. Thanks for watching. Dave. kzbin.info/www/bejne/e3rPfXqIZZ54bLs

[@Jo3yW]

Angela you should sign up with some employment agencies if you're looking to get on the tools. If you have quals and enthusiasm you're already more of an asset than some of the electrical mates out there, believe me! I was 40 when I entered the industry. Enjoyed it ever since.

[@steveokinevo]

Great to see the channel growing dave another excellent video, thanks for all your efforts pal.

[@learnelectrics4402]

Thanks Stevo and thank you to you for being so supportive. Very much appreciated. Dave.

[@steveokinevo]

@@learnelectrics4402 Any time mate, keep spreading the word.

[@azizurrahman6663]

Hi Dave , Another excellent video it it very helpful, your effort we learn, please do more video thank you

[@learnelectrics4402]

Definitely will make more Azizur. Thanks for supporting the channel. Dave.

[@tonydavison3312]

Your channel very educational and please keep the practical assessment coming! 100% subscriber🙂 Its very importance the test leads are nulled before carrying out any Dead Testing i.e., end-to-end resistance measurements. Also, when verifying the highest R1+R2 reading for a RFC with an additional spur, would the R1+R2 spur reading be recorded on the schedule of test results? Assuming the spur reading was the highest.

[@learnelectrics4402]

Yes Tony, record the highest reading for the circuit. Thanks for your comments. Appreciated. Dave.

[@richardlewis5254]

I've recently passed this exam. I always come back to your videos they are excellent

[@learnelectrics4402]

If they helped in a small way that is great. Thanks for watching and spread the word. Lots more to come. Dave.

[@nik2573]

I love all of your videos! Althought I'm familiar with alot of the knowledge in my working life, I still like to watch your videos as its extremely informative! Thank you 🙌🏽

[@learnelectrics4402]

Thanks Nikunj, much appreciated. We are always learning, never stop. Thanks for watching, Dave.

[@rizgar8121]

really good help.

[@learnelectrics4402]

Thank you. Dave.

[@alanmarriott9216]

Great video. Can I ask some advice please. On a ring I tested after an addition off a few extra sockets. My R1+R2 was 0.19 roughly but in a few other sockets this jumped up to 0.44. Could this be due to loose connections or worn socket not making contact properly with my plug top tester lead? Ps Do you have any videos on problems of a ring within a ring on testing and identifying please? Many thanks

[@learnelectrics4402]

Take a look at these two videos on testing and fault finding some problems on ring circuits kzbin.info/www/bejne/Zpm8YYpve8h3kNk kzbin.info/www/bejne/jGHCZ5KNotCgqbs

[@Dibbo1979]

Excellent video👍🏻

[@learnelectrics4402]

Thanks Dibbo. I hope you find this one useful. Dave.

[@ismailcetin8208]

hi Dave great video again many thanks can you make more about economy 7 information

[@learnelectrics4402]

We can definitely think about that one Ismail, I've put it on the list. Thanks for watching Dave.

[@renzoluci8381]

When doing the cross-connect line and neutral why do we divide it by 4?

[@learnelectrics4402]

Renzo, its how parallel circuits (ring circuits} work. Take a look at this video, it goes into detail about how this happens. Once understood, you will remember for ever. I know its about spurs but it starts off with simple ring circuits and the methods behind it. Thanks for watching and keep learning, its a good trade to be in. RING CIRCUIT SPURS - FINDING THE SPUR - CALCULATIONS AND TESTING - HOW TO SET UP THE TEST can be seen on this link ... kzbin.info/www/bejne/jGHCZ5KNotCgqbs

[@SuperZubair786]

Hi Dave We are waiting for your 2391 -52 (online exam pass) tips . Hope you will be helping us .

[@learnelectrics4402]

Definitely will. Thanks for your support. Dave.

[@azizurrahman6663]

Hi dave requesting ramp test and calculation please do video please

[@learnelectrics4402]

RCD ramp test is automatic Azizur. The RCD should trip between 50% and 100% of its rating. There isn't a calculation for the ramp test. Thanks for watching. Dave.

[@SuperZubair786]

Great 👍

[@learnelectrics4402]

Thank you. Glad you found it useful. Dave.

[@davidpatterson1574]

Thanks Dave

[@learnelectrics4402]

Thank you. Glad you found it useful. Dave.

[@robertgemmell1485]

Cheers👍🏻

[@learnelectrics4402]

Thank you Robert, thanks for watching.

[@Sergey3023]

👏👏👏👏👏

[@learnelectrics4402]

Thanks for the positive votes, really appreciated, Dave.

[@TonyAneil-u6e]

Can you please tell me where you are getting 0,9 from,, your calculation 1.67 x 0.9 = 1.5, ,,, where is 0.9 coming from PLZŹZZ

[@learnelectrics4402]

It is just a made up number, the resistance of the conductor is 0.9 ohms. We could just as easily chosen 0.6 ohms or 0.4 ohms. Hope this helps.

[@TonyAneil-u6e]

@@learnelectrics4402 Thank you soòoo much, really grateful, your videos are amazing