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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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    David,


    The attached document from NFPA might be of interest. 


    I am not sure how the NFPA actually determines the cause of real fires with such accuracy. Figure 2 for instance. 


    Nevertheless, even by this document the incidence of arc-faults as reported is low.  So reducing fires by 20% (per year, since the beginning of time, not sure what this figure represents) is perhaps questionable on the basis of NFPA data.


    Incidentally, UK dwelling fires are also following a downward trend (Home Office FIR 602, also attached) and without using AFDDs - but maybe once AFDDs are mandated, that trend will then be attributed to AFDDs... ;)


     fire-statistics-data-tables-fire0602-011020.xlsx
    NFPA osHomeElectricalFires.pdf
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  • 0
    David,


    The attached document from NFPA might be of interest. 


    I am not sure how the NFPA actually determines the cause of real fires with such accuracy. Figure 2 for instance. 


    Nevertheless, even by this document the incidence of arc-faults as reported is low.  So reducing fires by 20% (per year, since the beginning of time, not sure what this figure represents) is perhaps questionable on the basis of NFPA data.


    Incidentally, UK dwelling fires are also following a downward trend (Home Office FIR 602, also attached) and without using AFDDs - but maybe once AFDDs are mandated, that trend will then be attributed to AFDDs... ;)


     fire-statistics-data-tables-fire0602-011020.xlsx
    NFPA osHomeElectricalFires.pdf
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