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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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    Certainly arcs on 230V are a different matter, as the arc voltage drop is a smaller fraction compared to the supply voltage . But there are many factors that make US wiring a very different proposition as well as the voltage

    I suspect they might rail at the '3rd world' description but I'm inclined to agree the overall standard is technically lower,  in terms of domestic aluminium wiring, twisted joints, a proliferation of low rated branch circuits, neutral- earth bonding  the use of RCDs in sockets, not protecting the wiring, open backed wiring accessories and many others. As well as a tendency to build houses out of more flammable materials, it is after all harder to make a brick wall catch fire than a wooden framed one.

    Notwithstanding, the overall effect of AFDDs on the US fire figure do not appear to be significant, doll's house wiring or not, and it is unwise to assume a higher gain in the UK.

    regards Mike.
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  • 0
    Certainly arcs on 230V are a different matter, as the arc voltage drop is a smaller fraction compared to the supply voltage . But there are many factors that make US wiring a very different proposition as well as the voltage

    I suspect they might rail at the '3rd world' description but I'm inclined to agree the overall standard is technically lower,  in terms of domestic aluminium wiring, twisted joints, a proliferation of low rated branch circuits, neutral- earth bonding  the use of RCDs in sockets, not protecting the wiring, open backed wiring accessories and many others. As well as a tendency to build houses out of more flammable materials, it is after all harder to make a brick wall catch fire than a wooden framed one.

    Notwithstanding, the overall effect of AFDDs on the US fire figure do not appear to be significant, doll's house wiring or not, and it is unwise to assume a higher gain in the UK.

    regards Mike.
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