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Requirements for AFDD's on new installations following amendment 2?

Jblades

Following the amendment to Regulation 421.1.7

This now states that AFDD protection for socket outlets and fixed current using equipment is now "required" rather than recommended. I was wanting to know peoples thoughts on this, as currently an RCBO/AFDD is coming in at around £100 each, meaning cost implications on new consumer units will be huge. The cost doesn't directly affect us as contractors but more the end user. This could possibly put people off the idea of upgrading their consumer unit, no matter how dangerous the existing one currently is.

 

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  • No, this is a completely different situation - BS 7288 precludes itself within both its scope and introduction. Sort of shooting itself in its own foot as it were, by stating upstream protection should already be provided in the installation. Having said that, I'm not sure that was intentional.

    Basically, people are questioning the technical content of EN 62606, but BS 7288 states its scope clearly itself !

    But doesn't EN 62606 similarly shoot itself in the foot? If the devices won't work with series arcs of less than 2.5A then what's the point of putting them on say lighting circuits wired in T&E - thanks to LED lamps the load is very unlikely ever to reach 2.5A and any parallel arcs in a T&E cable would be very likely disconnected by an RCBO anyway.

       - Andy.

  • in reply to AJJewsbury
    AJJewsbury said:
    But doesn't EN 62606 similarly shoot itself in the foot? If the devices won't work with series arcs of less than 2.5A then what's the point of putting them on say lighting circuits wired in T&E - thanks to LED lamps the load is very unlikely ever to reach 2.5A and any parallel arcs in a T&E cable would be very likely disconnected by an RCBO anyway.

    It's only an issue if you specify the use of an AFDD to BS EN 62606 on such a circuit - that's not necessarily an issue with the product standard itself, but the use-case in either a design, or an installation or assembly standard, that specifies a product to that standard be used.

  • in reply to gkenyon

    Always expect the unexpected... It is a good thing that some wiring remained safe.

    https://www.bbc.co.uk/news/uk-england-london-60364090

    Z.

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