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AFDD: Hager vs. Hager

whjohnson

Mr Savery has graced us with yet another presentation of his latest findings on Hager's AFDDs and it doesn't end well! Indeed, it may well pay interested parties to view his new terms and conditions recently incorporated into his contract with consumers where AFDDs are concerned. It seems that he is not alone, with many people now refusing to fit the things or be held responsible for any malfunctions due to the manufacturer's badly written algorithms etc.

In other news, there seems to be a rumour doing the rounds about the withdrawal of the requirements for AFDDs at some future point due to the huge number of issues being experienced with them. Allegedly the rumour has come from a NIC assessor.

www.youtube.com/watch

  • in reply to Sergio Fernandez
    Sergio Fernandez said:
    The USA AFDD is very much a different device (GFCI)

    Isn't a GFCI (Ground Fault Circuit Interrupter) an RCD?

    AFCI (Arc Fault Circuit Interruptor) is the US version. There are two types - "branch" (parallel arc detection, I understand) and "combination" (series and parallel, like our standard AFDDs), but to meet NEC, combination type should be used?

    Also like our AFDDs, AFCIs are available in combined functionality devices - overcurrent, residual (ground fault) current and arc fault built into one breaker.

  • in reply to Kelly Marie Angel

    I too have seen David.S at DSES video, in fact it is now a series of 5 or 6 videos.  It does bring up many questions.  It is a shame that Hager do not take some of this onboard and speak to David and try and get this resolved.

    The USA AFDD is very much a different device (GFCI) from the UK AFDD.  The US version is far simpler in design and operation, notaly it can be tested in the field.  The UK AFDD is more like the German version.  The Germans called it a fire prevention device.  After several years of debate and wrangle the Germans removed it from their regulations.  This was about the time when the UK put it into BS7671.  There are several discussions on this forum about it.  Personally I think AFDDs are a good thing.  They are or should be a MCB + RCD + ARC.  This being said they need to be designed and fit for purpose, conform to a BS or BSEN standard and they need to be able to be tested in the feild.  I think that given time the product will mature. 

    1. Hi I've seen David's videos where he tests various AFDDs a it does seem like the Hager ones do have a problem. I beleive it's something they will sort out in the not to distant. One thing I don't get is that they've had these things in  the US for a few years now do they have as many issues with 5hem as we do? Can we not just copy the US technology admittedly it will Neen some slight mods mostly to do with making them suitable for 240 volts instead of 110 and 50 cycles instead of 60  don't know why they fo t just do that save all that faffing around

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