Excellent as usual, halfway through I was thinking I had to buy a new mft, lol. Your tip on setting to 100 at 1/2 saved the day. It's simple when someone educates you
There's no need to, but the half and five times tests sometimes reveal problems that you might miss, especially if the RCD is just starting to break down. I always do them, they only take 2 minutes longer and give you peace of mind.
You cannot do a 100mA x 1/2 test on a 30mA RCD. The tester does a check to make sure the voltage of the earthed metalwork does not go above 50V just before the actual test at 1/2 times the selected current, irrespective of the multiplier selected. It would do a 50mA precheck and trip the RCD with the display saying "trp" and not with a trip time. I have only come across the problem with AC RCDs failing when someone hasn't realised that the tester is set to type A. When testing type A RCDs on a type AC setting there is no problem.
The advice in the video is incompatible with the latest version of guidance note 3, which is very clear - A type 'A' RCD, or indeed type 'B' or 'F' any new type yet to be invented as well, should be tested as if it was an AC type at the rated current - so test at 30mA with an alternating current fault. The other tests, such as an unsmoothed DC at 42mA are options on many test instruments but are not listed in the minimum set of tests. For a normal alternating current still test at 1* and note the slowest trip time.
Can anyone advise ? I thought the x5 (150mA) test on a TN system was to verify the device's function for additional protection; which is what an RCD is for isnt it? If its no longer a requirement to record x5 results then what are we testing an RCD for ? Have I been thinking wrong all this time and a x1 (30mA) test below 300ms satisfies additional protection ?
James, a times one test is what is required by the Regs. However, many of will still do a times half and times 5 test as well. Occasionally I have come across an RCD that passes x1 but fails x5. Early warning that things are going wrong. I usually write the extra test results in the comments column or on the back of the certs. To answer your question, a 30mA RCd at x1 that trips in less that 300ms is a pass.
@@learnelectrics4402 A fail on a x5 test does not necessarily mean things are wrong, especially when testing RCD's other than of the AC type, see th-cam.com/video/mYWeN8HknPg/w-d-xo.html&ab_channel=LearningLounge
Yes, just 1 times for certification. Personally, I would carry on with half and five times for my own peace of mind. But not obliged to. Thanks for watching. Dave.
IET put up a video on the amendment 2 changes , and they say we are now only required to test at 1 times on the Test instruments AC setting irrespective of RCD type and they should trip in less then 300 ms , and the 1/2 times and 5times tests are no longer a requirement And we are not required to buy new test instruments, but we can continue doing all the tests if we want to . I will continue to do all RCD test as I always have done. Fantastic video very well explained. The effectiveness of automatic disconnection of supply by RCD shall be verified using suitable test equipment according to BSEN 61557.6 NOTE: regardless of RCD type effectiveness is deemed to have been verified where an RCD disconnects within the times stated below with an alternating current test at the rated residual aperrating current (I^n) for general non- delay type 300ms maximum For delay ’s’ type RCD between 130ms minimum and 500ms maximum , oh I am not trying to correct you or be disrespectful Fantastic video As always Dave 👍👍👍👍❤️
Sean, yes I would still do all the "old" tests myself, peace of mind. Your last paragraph, isn't that what I have put in the video. Thanks for the support. Dave.
Hi Dave, thanks for your very detailed videos and understandable. If I may ask you what type of multifunction tester do you recommend to an electrician, the brand and type for domestic and commercial electrical installations?
Thanks for the question Nicholas. Have a look at the video below. There have been more Multi-Function Testers added to all the ranges since it was made but you will get the idea. They are all pretty much the same in what they will do, just how many features do you need. I would certainly consider one that was settable for different types of RCD. Depends how much money you have in the budget. Ask at two or three wholesalers before deciding, there will always be a sparky there that will tell you about their meter. Here's that video. BUYING MULTI-FUNCTION TESTERS, click on the link below th-cam.com/video/6Q4CM_6M4wo/w-d-xo.html
Excellent as usual, halfway through I was thinking I had to buy a new mft, lol. Your tip on setting to 100 at 1/2 saved the day. It's simple when someone educates you
Thanks Jimmy. We all learn from each other. Dave.
Very useful knowledge. never considered this before. Well done Dave, really really appreciate
Glad it was helpful and thanks for watching. Dave.
Love it mate. Keep making videos.
Thanks, will do, keep watching. Dave.
Great video but how would you code the rcds that are ac type in an eicr. Comercial property ?
We have a video on that coming out in two weeks. Thanks for the question and thanks for watching. Dave.
@LEARN ELECTRICS can't wait! It's at least a c3 I know that much :)
Hi Dave...would I still carry out the 5x and 1/2x if the circuit was designed in the 18th edition, but before the amendment. Many thanks in advance 👍
There's no need to, but the half and five times tests sometimes reveal problems that you might miss, especially if the RCD is just starting to break down. I always do them, they only take 2 minutes longer and give you peace of mind.
You cannot do a 100mA x 1/2 test on a 30mA RCD. The tester does a check to make sure the voltage of the earthed metalwork does not go above 50V just before the actual test at 1/2 times the selected current, irrespective of the multiplier selected. It would do a 50mA precheck and trip the RCD with the display saying "trp" and not with a trip time.
I have only come across the problem with AC RCDs failing when someone hasn't realised that the tester is set to type A. When testing type A RCDs on a type AC setting there is no problem.
Absolutely. Thanks for watching.
The advice in the video is incompatible with the latest version of guidance note 3, which is very clear - A type 'A' RCD, or indeed type 'B' or 'F' any new type yet to be invented as well, should be tested as if it was an AC type at the rated current - so test at 30mA with an alternating current fault. The other tests, such as an unsmoothed DC at 42mA are options on many test instruments but are not listed in the minimum set of tests. For a normal alternating current still test at 1* and note the slowest trip time.
Thanks for watching, appreciated.
Can anyone advise ? I thought the x5 (150mA) test on a TN system was to verify the device's function for additional protection; which is what an RCD is for isnt it? If its no longer a requirement to record x5 results then what are we testing an RCD for ? Have I been thinking wrong all this time and a x1 (30mA) test below 300ms satisfies additional protection ?
James, a times one test is what is required by the Regs. However, many of will still do a times half and times 5 test as well. Occasionally I have come across an RCD that passes x1 but fails x5. Early warning that things are going wrong. I usually write the extra test results in the comments column or on the back of the certs. To answer your question, a 30mA RCd at x1 that trips in less that 300ms is a pass.
@@learnelectrics4402 A fail on a x5 test does not necessarily mean things are wrong, especially when testing RCD's other than of the AC type, see th-cam.com/video/mYWeN8HknPg/w-d-xo.html&ab_channel=LearningLounge
Great clarification thanks Dave. I take it the 1/2 times is now ignored also apart from fault finding purposes?
Yes, just 1 times for certification. Personally, I would carry on with half and five times for my own peace of mind. But not obliged to. Thanks for watching. Dave.
Great video.... Done my 18th edition. But not the ammendment.
You don't need to do the amendment exam if you can follow the changes and these videos will help. Thanks for watching, lots more to come, Dave.
Thanks for this helpful information
And thank you for your comments, thanks for watching. Dave.
IET put up a video on the amendment 2 changes , and they say we are now only required to test at 1 times on the Test instruments AC setting irrespective of RCD type and they should trip in less then 300 ms , and the 1/2 times and 5times tests are no longer a requirement
And we are not required to buy new test instruments, but we can continue doing all the tests if we want to . I will continue to do all RCD test as I always have done.
Fantastic video very well explained.
The effectiveness of automatic disconnection of supply by RCD shall be verified using suitable test equipment according to BSEN 61557.6
NOTE: regardless of RCD type effectiveness is deemed to have been verified where an RCD disconnects within the times stated below with an alternating current test at the rated residual aperrating current (I^n) for general non- delay type 300ms maximum
For delay ’s’ type RCD between 130ms minimum and 500ms maximum , oh I am not trying to correct you or be disrespectful
Fantastic video As always Dave 👍👍👍👍❤️
Sean, yes I would still do all the "old" tests myself, peace of mind.
Your last paragraph, isn't that what I have put in the video. Thanks for the support. Dave.
@@learnelectrics4402 yes you did , sorry mate I got a little bit distracted by my grandson but I did watch again to the end.
Hi Dave, thanks for your very detailed videos and understandable. If I may ask you what type of multifunction tester do you recommend to an electrician, the brand and type for domestic and commercial electrical installations?
Thanks for the question Nicholas. Have a look at the video below. There have been more Multi-Function Testers added to all the ranges since it was made but you will get the idea. They are all pretty much the same in what they will do, just how many features do you need. I would certainly consider one that was settable for different types of RCD. Depends how much money you have in the budget. Ask at two or three wholesalers before deciding, there will always be a sparky there that will tell you about their meter.
Here's that video.
BUYING MULTI-FUNCTION TESTERS, click on the link below
th-cam.com/video/6Q4CM_6M4wo/w-d-xo.html
@@learnelectrics4402 Thanks for your help Dave much appreciated
Ngl... Blowing my brain
Thanks for watching. Dave.
Great content as always. 👍
Much appreciated, thanks for watching. Dave.
Brilliant info 10/10
ten out of ten. Great. Thanks for watching. Dave.
Very informative
Thank you and thanks for watching. Dave.
Thank you good advice
Very welcome. Thanks. Dave.
Thank you very much. 🙏🙏🙏
You're most welcome Susantha and thank you for watching, appreciated. Dave.
Thank you, appreciated. Dave.