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The Arc Fault Detection Device… again.

whjohnson
Some humourous but valid observations on AFDDs, the state of the industry, the wiring regs and future amendment requirements.

He also attempts to build a AFFD tester which electrically tests rather than relying upon the mechanical action of the test button on the device itself.

https://www.youtube.com/watch?v=e0ElFaKc_e8

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    I found the comment that a large surface area was needed for the arc very interesting - that would seem to undermine detection for many (if not most) real-world arc situations (e.g. loose wire in terminal or damaged cable).

     
    trying to locate a loose connection 'somewhere in the house' could be a nightmare

    Given that one of the more annoying limitations of AFDDs is that they can only cover a single final circuit each (so you can't have an AFDD covering multiple circuits or an entire installation like you can with RCDs) then it should be just one final circuit you're searching.


      - Andy.
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  • 0
    I found the comment that a large surface area was needed for the arc very interesting - that would seem to undermine detection for many (if not most) real-world arc situations (e.g. loose wire in terminal or damaged cable).

     
    trying to locate a loose connection 'somewhere in the house' could be a nightmare

    Given that one of the more annoying limitations of AFDDs is that they can only cover a single final circuit each (so you can't have an AFDD covering multiple circuits or an entire installation like you can with RCDs) then it should be just one final circuit you're searching.


      - Andy.
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