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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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    Hello Chris.

    It's something I picked up several years back when I was reading the specs and experience of AFDDS in the USA vs UK, but I must admit I can't find that first-hand now.

    AFDDs for sale in the UK must comply with BS EN 62606.  I haven't got access to that, but Schneider have a technical description of their AFDDs with respect to BS EN 62606 and this refers to the requirement that an AFDD must trip in 1 second at 2.5 amps.  It doesn't say what it does below that value; I think it does not respond to avoid nuisance trips, but am open to correction.  If I can find something more definite I will post it here.

    I've attached Schneider's technical description here - it's Table 1 on page 6.  So it looks as though the tripping threshold is actually 2.5 amps.
    Schneider EDCED117020EN.pdf

    Regards,

               Colin.
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  • 0
    Hello Chris.

    It's something I picked up several years back when I was reading the specs and experience of AFDDS in the USA vs UK, but I must admit I can't find that first-hand now.

    AFDDs for sale in the UK must comply with BS EN 62606.  I haven't got access to that, but Schneider have a technical description of their AFDDs with respect to BS EN 62606 and this refers to the requirement that an AFDD must trip in 1 second at 2.5 amps.  It doesn't say what it does below that value; I think it does not respond to avoid nuisance trips, but am open to correction.  If I can find something more definite I will post it here.

    I've attached Schneider's technical description here - it's Table 1 on page 6.  So it looks as though the tripping threshold is actually 2.5 amps.
    Schneider EDCED117020EN.pdf

    Regards,

               Colin.
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