TESTING LIGHTING CIRCUITS - AMENDMENT 2 - THE 3 PLATE METHOD
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- Опубліковано 4 жов 2024
- In this video from Learn Electrics, we will look at the testing of lighting circuits to the 3 plate method - as is found in many domestic and commercial installations.
Amendment 2 of the Wiring Regulations introduces some changes to the testing method that you need to be aware of, especially if you have been testing to previous versions of the Regulations. There is new information, a complete re-write of an important regulation that could affect how you test lighting circuits.
To view all of our videos type in LearnElectrics all one word into the UA-cam search bar.
This is video No.150 on our UA-cam channel where we have videos on a wide range of electrical topics.
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This content is so useful, to all in the trade. So well explained too. 👏🏼
Glad you think so, thanks for the great feedback. Dave.
Also useful for those not in the trade.Thank you!
Hi Dave. Thanks again for this.. Your video lessons are a must see for me.. very clear and great detail.. (even with a 'crunchy' microphone.. lol )
I know, I've tried 3 microphones and different settings. It might be the acoustics in the room. But thanks for watching, great support from you. Crunchy Dave.
Great refresher, thank you for your work 👍👍👍👍
My pleasure, thanks. Dave.
Another great video, very helpful and easy to understand ,,, Thank you sir..
You are very welcome and thanks for watching.
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 for the comments, appreciated.
@@learnelectrics4402 welcome
A great reminder. second time of watching.
Thank you, lots more to come.
Hi Dave, thanks for another great video. How would you do the same tests on a lighting circuit which has many LED fixed downrights and with all the neutrals taken to the switch. It would be very time consuming to disconnect all the downlights. A video on this would be fantastic as LED downlights are very common nowadays. Many thanks Chris 😊
Great suggestion Chris, its on the list. Dave.
@@learnelectrics4402 Thanks Dave, looking forward to seeing it.🙂
Thank you.. great explanation.
You are welcome Neila, apprecisted.
Fantastic videos as always
Thanks very much, appreciated comment. Dave.
Thank you for the video. Could you please make a video on how to test the lighting circuit operated by contacters . Sequence and what to pay attention to.☝
Great suggestion, I will put it on the list. Dave.
Dave a video on dimmers and flickering lights would do nicely since this has become a bigger issue lately with new tech meeting old. Incompatibilities of lamps and olde dimmers... Also the mixing of LED and conventional lamps on the same circuit etc... Just a suggestion - cheers again
Thanks for the feedback. Its already on the list to be done, I'll bring it to the top of the pile. Thanks. Dave.
Cheers
Great video👌🏻
Thanks Dibbo, great support as always and thanks for watching. Dave.
At 6:46 in video a wiring diagram of switching the neutral would have been useful to visualize how this might happen. Swapping the neutral and live loop bars wiring would do this i assume. Thanks for a great video .
The best way to learn Michael is to have a go at sketching it out yourself. Once you do that you won't forget it. Thanks for your support. Dave.
This is what I did for my engineering exams. Draw the circuit, throw it away. Draw the circuit, throw it away. Eventually you can visualise it without drawing it. Use the same method with mock exam papers. Write out the question and answer. Throw it away. Repeat until you can write the question and answer from memory. If you get a similar question in the real exam, you're already half way there. The important thing is to keep learning. Where there's a will, there's a pay check. Dave.
Was there ever a,2 plate version of this video made? Great video as alwast btw
What an excellent idea. I should have spotted that, its now on the list. Dave.
Thank you ❤️
You’re welcome. Thanks for watching. Dave.
Hi Dave, thank you for yet again a great video. I wonder if you could help with a fault that I came across recently and that I could not quite understand.
I tested a light fitting (2x wall lights), fitting no.1 voltage correct and switch operated correctly but as soon as I connect a lamp the circuit goes dead, meaning if I put a voltage pen on the line, no current. As soon as I disconnect the lamp, the current reappears. Fitting no.2 no power whatsoever. The circuit is RCBO protected and the same fault appears in the next room on the opposite wall but with both light fittings in that room.
These lights are part of the ground floor circuit with other lights all working correctly.
Please advise if you have any theories or thoughts. Thank you!
It sounds like a wiring fault in which case its back to basics. Isolate the circuit and start with dead testing.
Take a look at the video below on lighting problems.
ua-cam.com/video/S1Tzr5VX8-Q/v-deo.html
This one is about testing 3 plate lighting
ua-cam.com/video/p_qJx4lcp1U/v-deo.html
Two plate and three plate differences
ua-cam.com/video/NEjCXO_ZC5c/v-deo.html
Two way lighting
ua-cam.com/video/IGEs5ZZqZx0/v-deo.html
Hope these help. Dave.
Thank you very much Dave. Regards
Can you please do a video on Part 1 scope object and fundamental principles? find questions on this hard
Its already on the list. Part 1,2,3 Amendment 2 will be in a couple of weeks.
Next week is Part 4 questions. I've done part 4 and 5 first as they make up 50% of the exam questions. Keep watching and thanks for the support. Dave.
@@learnelectrics4402 Dave thank you very much for the response, I have my course next week. Is it a bad idea to look at your videos on the older book for the earlier parts?
Thanks again for the video. I'm a little confused about testing E continuity at the switch. At 8.25 you show testing between the E block and the Common terminal giving a reading of 0.62 Ohms but then at 8.46 (as a hypothetical example) an OL reading. I don't understand how operating the switch will make any difference since Common is permanently live. What am I missing?
Mr G. The switch wire TO the switch is often put in the common, and the switch wire FROM the switch in L1 or L2 terminal. No problem. But, sometimes you will come across a switch where the switch wire TO the switch is in L1 and the wire back to the ceiling rose is in the common. It makes no difference to function and is not wrong, just that the permanent live switch wire in L1 and that is the wire to test for continuity of the earth back to the CU. Basically, if the switch has been wired "upside down" then the common will not be permanently connected, but L1 will. Hope this helps. Dave.
@@learnelectrics4402 Thanks for replying. I always assumed that the live from the live/loop block would go to Common at the switch (as you show in your diagram) but I understand that it could just as easily be put in L1 or L2 and the switched feed taken to the switch block through Common. I still don't see how in your diagram where live feed is taken to Common and you test between Common and Earth block and get OL that switching the switch over would give a "proper" reading while still testing between Common and Earth block.
The drawing is only a guide, it could be either wire, it was only put in as an example of what you might come across on site. If you do get an OL at the switch, don't assume you have a broken wire, try the easier solution first and test the other terminal. Dave.
@@learnelectrics4402 Thanks for your patience. I look forward to all your videos - best for learners on UA-cam without doubt.