TESTING RADIAL CIRCUITS Lighting, Cookers, Showers and Radial Socket circuits.
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- Опубликовано: 7 фев 2025
- This video is an introduction to the testing and verification of radial circuits.
The dead tests on a circuit will confirm that we have cable continuity, the correct polarity and switching arrangements and that the conductors are adequately protected by insulation to prevent unwanted shorts and other electric shock hazards.
The tests that are shown form the foundation of electrical circuit testing and, understanding these is essential in ensuring the safety of users of the installation.
This is explained in clear and easy to understand terms and the video will help to put the different tests into the proper context.
This video is No.73 on our RUclips channel where we have videos on a wide range of electrical topics.
To see a full list of all our LearnElectrics videos, click on the link below.
/ @learnelectrics4402
You can also view all our videos by typing LearnElectrics all one word into the RUclips search bar.
Always work safely, electricity can be dangerous. If you are unsure, stop and seek advice.
SEE ALL VIDEOS - To view a list of all our LearnElectrics videos, click on the link below.
There are many videos on many electrical topics including Installation, Part P, 18th Edition, Testing, Certification, Lighting, Sockets, Ring Circuits and much more.
ruclips.net/channel/UCYaJQnpO4XAp0yCgqzMkmfA
When I was doing priacticle fo 2391 I was testing continuity or big R1 and R2 between the motor connections and the main contactors on one side and it gave very big of I million ohms. Was that normal??
Your videos are certainly the best out there. I am currently studying for 2391 and these have been invaluable. Some other videos online are too fancy and full of waffle - yours get straight to the point and are simple, clear and concise. Many thanks.
Thanks Loz. I try to make one video about one thing. Thanks for watching, Dave.
I have just started studying the 18th Edition and your videos are way better than any other courses.
Huge THANKS!
And they're free. Thanks for the great feedback Antony.
Please tell your friends and colleagues about our channel, it helps us to make more.
Dave.
A very understandable, and informative video.
Thank you David. Glad you found it helpful.
Excellent Video. Clear and concise.
Thank you, thanks for watching. Dave.
thank you General Dave very happy to share with those who want to learn
Glad you enjoyed it and thanks for your support. Dave.
Learn electrics, you are the man ! ❤
Thank you Jeff, I really appreciate that comment. And thanks for watching. Dave.
Great video, I was always confused about insulation resistance testing and where the tester was suposed to be connected, this video makes it very clear and the examples showing what things should be removed and the role switches play are very helpful, thank you!
Glad it was helpful Aryan, thanks for watching.
Thank you very much, I always learn something new with your videos. Appreciated
My pleasure, appreciated comments. Dave.
Very helpful videos appreciated
Glad it was helpful, thank you. Dave.
Another fantastic video as always Dave 👍
It’s its quite easy really, the hard bit is understanding the readings and what they mean,and remembering to test every single part of each circuit , many sparks don’t operate the switches
cOntinuity has an O for LOw Ohms.
Insulation Testing starts with an I for hIgh
Thanks for the feedback. Dave.
Wow! This is very informative, thanks for sharing it with us Dave. It worth it and the best tutorial on the topic for me...dl
Thanks Daniel.
@@learnelectrics4402 welcome
Your video is very easy to understand… thanks
You're very welcome Tony. Thanks for watching. Dave.
Many thanks again for the great effort you made.. 👍👍👍👍👍
Happy to help and thanks for the positive feedback.
Thanks for the efforts👌
Glad you enjoyed the video. Thanks for watching. Dave.
Another great video. Thanks Dave.
Thank you, brilliant comments.
very informative thank you
Glad it was helpful, thanks.
Wow! This is very informative. Thanks for sharing it with us...
Glad you found it useful. Dave.
Great stuff! Thanks!
Glad you liked it and thanks for watching.
Great video as usual,, many thanks
Thank you. Tomorrows video will answer your questions about Zs and the 100 amps etc. I will send you a link Sunday morning, when it is published. Thanks for your support. Dave.
@learnelectrics4402 Great, i will be waiting to watch.
Thanks a lot for uploading
Thank you, appreciated.
Brilliant explanation thank you
Glad it was helpful and thanks for watching. Dave.
❤thanks for sharing your video ❤
My pleasure, thanks for watching. Dave.
Lads Dave's videos are amazing it beats the others out there let's be honest. Spread the word.
Thank you Steve, and yes I agree. Spread the word.
Your comments are truly appreciated.
Thanks. Dave.
@@learnelectrics4402 no worries dave your channel deserves more mate, get the word out. I'll keep throwing your link around anyways glad ta help.
Cheers mate.
Another one watched dave 👍👍 I would have loved to have somebody like you as a teacher learning electrics 👍👍 seriously your videos are brilliant!!
Thanks for the fantastic feedback, really appreciated. Your comments make it all worth while. Thanks for your support. Dave.
Another informative and well put together video....... thank you :)
Thanks Ronaldo, appreciated. Dave.
Excellent video
Glad you liked it, thank you for watching. Dave.
Great
Many Thanks to you
Thank you too, appreciate the comments. Dave.
excellent video as always
Thanks Jimmy, really appreciate your comments. Dave.
Thank you so much for these videos, by far the clearest explanations I've seen. But just to clarify, if a lighting circuit has multiple points (e.g. several rooms each with a ceiling rose/ switch) presumably each and every one of the rooms needs to be tested for continuity at the ceiling rose and the switch as described in your video. If that is the case what R1+R2 reading is recorded, the highest?
Yes, correct. If the worst case passes the Zs requirements, then so do all the others. Thanks for watching. Dave.
excellent stuff thanks
great comment. Thanks.
Pushing a 👍 button before watching your videos :)?
Excellent feedback. Thanks.
In the polarity test, Lets say you have 5 sockets in a radial circuit. Do you have to test the polarity on every socket or just the last socket?
Also, If it's just the last socket then which switch do you have to flip to test polarity. Is it the switch of the socket you are testing polarity on (e.g. last switch) or can it be any single switch in the radial circuit (e.g. third switch)?
I would test every socket. If you are using a socket adaptor, flick the switch on the front of the switch outlet.
Great video. Pls sir while test for insulation resistance test, do you connect the both end
Have another look at the video. You do the IR test will all the cables separated from each other.
Also have a look at this video on continuity tests which MUST be done before IR tests
ruclips.net/video/tT3eGK1b0Yk/видео.html
Hope this helps. Dave.
Very comprehensive. Many thanks.
Is it possible to do one video on EICR, domestic complete testing using any multimeter. I meamt ring, radials And if LEDs are fitted in the house how to bypass those 50 plus LED's?
thanks again for making it easy to understand.
Thank you Asad. Those videos are planned, keep watching and thanks for your great support. Dave.
Hi. If a ring circuit and a spur was taken from a socket,
1. Would the reading also be. example; 52ohms
2. If somebody has put a spur on spur, then what would the readings likely to be. Would this show a spur has been taken from a spur by mistake, not noticeable from the eye looking at the room.
Regards
The spurs would show up as a higher reading. Take a look at this video we made, and thanks for watching. Dave.
RING CIRCUIT SPURS - FINDING THE SPUR - CALCULATIONS AND TESTING - HOW TO SET UP THE TEST
ruclips.net/video/V0_6_WmkmsY/видео.html
Joining L-N together for IR test only acceptable for periodic inspection. For initial verification you can test L to N at 250V but reading must be over 1Mohms. That what your GN 3 says
Correct. Thanks for watching.
Are these tests done when you’re adding another wall socket
We should always test any electrical works that we do. Wall sockets can be radial circuits or ring circuits and we have videos on both these. Go to LearnElectrics.com and put your question keywords into the search box and you will get a list of all our videos that are relevant. Nearly 200 to choose from. Hope this helps. Dave.
Hi. What testing equipment are you using for these tests?
A Multi-Function Tester (MFT). Thanks for watching. Dave.
Hello sir can u post a video regard to voltage leak at a point of use...Thank you sir.
Have a look at our video "Earth Leakage Measurements" on this link.
ruclips.net/video/VrvT2tdCbm4/видео.html
Hope this helps. Dave.
What if the cable is nym instead of twin & earth?
They can still be tested, use the appropriate tables in GN3 for reistances etc. I just quoted T?E because its most often used. Thanks for watching. Dave.
@@learnelectrics4402 thanks Dave 👍
Continuity test only for Phase to Earth and Neutral to Earth? How about Phase to Earth?
I think you mean neutral to earth. For straight forward continuity, we have proved all three conductors in just two tests. Hope this helps.
How about a video about testing a 3 phase db?
Its on the cards to be done Denise. Thanks for asking. Dave.
👍👍👍👍🙏🙏🙏
Thanks for watching. Dave.
shouldn't you redo this vid? 1MOhm is a pass but now if the reading is below 2Mohm then it warrents further investigation?
Yes Shaun, they will all get revamped. Thanks for watching. Dave.
@@learnelectrics4402 thanks for the reply Dave. Good vids btw👍
Why can’t you just test everything with 250v then you haven’t got to worry about drivers, dimmers, USB’s etc
I know what you mean Stephen, but the boffins make the rules. They say that if it doesn't leak at 500 it is unlikely to leak at 230. Thanks for watching. Dave.
@@learnelectrics4402 brilliant videos by the way Dave.
Could you consider doing a video on Dali lighting?
Confuses the hell out of me.
Its a good ask that one. Maybe I should do something on DALI and DMX etc.
I've put it on the list for future videos.
Thanks for watching.
Dave.