This breaker is a combined overcurrent and leakage device. It had a fault where it wouldn't reset, and the issue was annoyingly trivial.
If you wonder why there's an awkward bit in the video it's because I left the camera running when I was exploring the circuitry. The channels Patreons suggested I leave it in as a glimpse of what goes on in the jump-cuts.
Thomas Nagy's channel can be found at:-
https://www.youtube.com/channel/UC6EJTy6p58ZW16PEljSn4Qw
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.

11 thoughts on “Failed mk rcbo circuit breaker with awkward recording moment”
  1. Avataaar/Circle Created with python_avatars Seth Murphy says:

    Fascinating how large your circuit breakers are. Here in North America (except on dedicated circuits), you'd rarely find anything higher than 15 or 20 amps (at 120v of course). Granted, I understand that the NA and UK circuit designs are quite different. We generally have dedicated circuits (kinda like a hub and spoke model) as opposed to ring circuits. I also think our circuit breakers are designed to trip if the current exceeds the rating by a much lower margin (I'm not sure of the exact margin, I'd guess 10-15%).

  2. Avataaar/Circle Created with python_avatars Game Clan says:

    These rcbo devices create extremely high levels of dirty electricity we are all electrical beings I have no idea why electritions install these , rcbo devices creates fibromyalgia increases to the suicide rate, hopefully these devices are phased out

  3. Avataaar/Circle Created with python_avatars Goo Gle says:

    Wow, thank you for the "Being Big Clive" moment. For a period of time I was transported into you mind while looking for the location for that safety/test button. It's like I was right there searching for the wear marks and how the button was installed. It was amazing, thank you.

  4. Avataaar/Circle Created with python_avatars J. Potter says:

    Thanks for breakdown of the AC MCB – almost brand new, separation of arc is shown nicely, sensor unit & C.T. similar to old SOLCOR Protection.

  5. Avataaar/Circle Created with python_avatars Roger Smith says:

    It's just amazing how many people don't read the descriptions that would have made about 1/2 of these questions and/or comments unnecessary. Although I will say that this group of Clive followers DO seem a bit less dim than most! ;^)

  6. Avataaar/Circle Created with python_avatars Ad 2.0 says:

    i wonder if this was one of the "recalled" ones from the MK catastrophe year of 2016 where MK recalled an absolute shed load of RCBO's The recall cost our firm around £9k in labour to replace all the faulty RCBO's

  7. Avataaar/Circle Created with python_avatars Nex says:

    Had to drop a like and subscribe purely for the "WTF are these" comment.

  8. Avataaar/Circle Created with python_avatars That engineering channel says:

    Is it just me or that datasheet is advocating the use of an SCR to sort out the mains and trip the circuit breaker?

  9. Avataaar/Circle Created with python_avatars AlmostAnEngineer says:

    I don’t think I’ve ever seen Clive stumped for words before 😳

  10. Avataaar/Circle Created with python_avatars Andy Frank Luna Morales says:

    I never heard so much silence on this channel,grandmaster your concentration goes to another level .

  11. Avataaar/Circle Created with python_avatars marscruz says:

    In 2008 that bit of plastic flashing would have been more famously know as: Hanging Chad
    …from the voting machine punch hole dies that didn't cleanly drop their punched confetti.
    Or was it 2004? Old news fades quickly.

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