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Testing A-type RCD at half times 100m/A ?

I watched a video the other day which mentioned that A-type 30m/A rcd's should be tested at about 54m/A i think it was and that setting your tester to 100m/A and doing a half times test was was acceptable.  Is this correct and where does it come from.

Cheers.  Gary

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  • You may prefer this video describing some of the recent updates, it is a bit tongue in cheek, but seems to be more accurate.

    About 3 and a half minutes in it reaches the RCD related stuff, and is good enough to be very clear, 30mA RCDs, of all types, are to be tested with a sinusoidal alternating current  fault of 30mA RMS, as per this screenshot.

    On a different AMD2 surprise note

    Amusingly and perhaps slightly nugatory,  the building I am part way through in my own garden will have foundation earthing anyway, as I had welded the studs onto the mesh before the AMD2 came out, and the floor is now poured, but it will still be interesting to see how it tests out.

    Mike.

  • Splendid!

    Had I known about foundation earthing when I had my garage extended, I (or at least my contractor) would have made suitable provision for it. Just because something is not required is no excuse not to have it, or at least make it simple to install at some future point.

    Fortuitously, I bunged in a length of galvanised conduit for power and lighting in the pit, so that will have to do instead.

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  • Splendid!

    Had I known about foundation earthing when I had my garage extended, I (or at least my contractor) would have made suitable provision for it. Just because something is not required is no excuse not to have it, or at least make it simple to install at some future point.

    Fortuitously, I bunged in a length of galvanised conduit for power and lighting in the pit, so that will have to do instead.

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