Guide to completing an RCD test and how to complete the test sheet

[@mohamedsiadabdille7631]

Thank you very much really enjoying your RCD test, I appreciate your time, Cheers

[@ElectricalStudentsUK]

My pleasure!

[@frankgault7845]

I'm enjoying your very simple and clear explanation and demonstration of each test. Cheers

[@ElectricalStudentsUK]

I am glad the videos are helping you !

[@ianperkins8317]

Note: Regs now only require test at 1x delta t and for a Type AC rcd (regardless of the actual type).

[@ElectricalStudentsUK]

Yes this is true, it gives more detail in Guidance Notes 3 regarding the unknown damage and wear and tear caused on the RCD by making it trip so often. I am creating these videos to show the basics, step by step for those who are just starting on their journey to becoming an electrician. I am hoping people with experience and knowledge like yourself and I can help the new trainee electricians build a find foundation of knowledge before getting into the more complex and complicated topics. They must walk before they run! Thank you for your input and thank you for sharing.

[@dazzafat]

Theres no need to test each mcb, you're testing the trip time of the RCD and therefore only need to carry out the test once and that can be done at the RCD itself

[@Mainly_Electrical]

Is that what occurred. Tripped it at each breaker ?

[@RadhaKrishna-hy6cg]

What is the standard recommended frequency of testing and functional testing?

[@ElectricalStudentsUK]

The recommended functional test frequency is every 6 months. To be completed by the home owner or installation user. Stated in Regulation 514.12.2

[@ChooseLife.YourLife]

Now that type A is the standard rcd's to be tested rather than when it used to be type AC rcd's, do i need a different function on my tester? I can't seem to find a setting on it which will change between the different types of rcd's

[@ElectricalStudentsUK]

The RCD setting on most tester will test any type of RCD. You only need to change the mA setting that matches the mA rating of your RCD

[@Dog-whisperer7494]

No you are only required to test the RCD/RCBO on the Ac setting at it rated close ie 30ma regardless of what type the RCD is and you only need to test at one times half time and five times test is no longer required.you can do them if you want to but you are not required to do them.

[@barrysimmons5549]

I'm confused if you're doing an RCD life test. And there are different ones when it comes to radios/ring. Which one do you do If ring s using the plug socket. And radials. Is using crocodile tips. Can anyone please explain. I thought RCD is one test.

[@graemesmithson6307]

See post above. The test you have performed is incorrect and is only testing the RCD for the DB and is not recorded on the sheet you have used. The RCD test for a circuit should be carried out at the furthest point of the circuit. This will take into account the circuit resistance R1+R2 and Rn. The test you carried out is only using the external impedance Ze at the DB and not the fault circuit as a hole. The aim of the test is to take the total resistance of the circuit, the fault path, which will determine how quick the RCD will trip under fault conditions, the higher the resistance the slower the trip time. Therefore the RCD test requires to be done on every circuit and recorded in the location you used. The test you carried out is recorded on sheet 2 under, Main switch / Switch Fuse / Circuit breaker / RCD, under "If RCD main switch". I would take this done before someone gets hurt and is traced back to your KZbin. I am retired now but I am an Accredited Electrician.

[@graemesmithson6307]

The test you have performed is incorrect and is only testing the RCD for the DB and is not recorded on the sheet you have used. The RCD test for a circuit should be carried out at the furthest point of the circuit. This will take into account the circuit resistance R1+R2 and Rn. The test you carried out is only using the external impedance Ze at the DB and not the fault circuit as a hole. The aim of the test is to take the total resistance of the circuit, the fault path, which will determine how quick the RCD will trip under fault conditions, the higher the resistance the slower the trip time. Therefore the RCD test requires to be done on every circuit and recorded in the location you used. The test you carried out is recorded on sheet 2 under, Main switch / Switch Fuse / Circuit breaker / RCD, under "If RCD main switch". I would take this done before someone gets hurt and is traced back to your KZbin. I am retired now but I am an Accredited Electrician.

[@Dog-whisperer7494]

I have been a qualified electrician for thirty eight years. Point one what is an accredited. There is no legal requirement or regulation requirement for any spark to be registered/accredited . Never has been. The purpose of the RCD test is to determine if it will trip within a specified time ie at 1x its rated current we expect it to trip in less than 300ms at 5x in less than 40ms . We can test at the socket or the CU . If you already know what the Ze and Zs values are and you want to know the the RCD will operate at we do a ramp test which will tell how much current it takes for the RCD to operate.

[@Dog-whisperer7494]

Watch the video again. He did the test correctly. He clearly tested the lighting circuit and he probed onto the outgoing side of the MCB . If he did what you are talking about then he would test at the top of the RCD ie green lead on the earth bar brown probe on the RCD line and blue probe on the RCD Neutral. .

[@Ibrahim-vt2tz]

Nice video good explanation but your hand is on the way we can not see RCD tripping ❤❤❤❤

[@ElectricalStudentsUK]

👋 😂 sorry pal. Promises it is tripping!