Arc Fault Detection Devices

Former Community Member over 5 years ago

Hi Everyone,

I'm just wondering how everyone is faring with AFDDs, especially in commercial/industrial installations?

421.1.1 states that you shall protect against "insulation faults or arcs, sparks and high temperature particles", yet 421.1.7 only recommends AFDDs,

What are everyone's thoughts?

Thanks,

Nathan

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0 Sparkingchip over 5 years ago

MCBs and fuses react to parallel arc faults and with twin and earth cable the bare CPC is between the live conductors, how much faith do you have in AFDD to detect a problem that MCBs, fuses and RCDs won’t react too anyway?

Andy B.
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0 Sparkingchip over 5 years ago

MCBs and fuses react to parallel arc faults and with twin and earth cable the bare CPC is between the live conductors, how much faith do you have in AFDD to detect a problem that MCBs, fuses and RCDs won’t react too anyway?

Andy B.
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