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RCD TESTING BS7671:2018+A2:2022

sparkiemike

Anybody notice the changes to 643.7.1 and 643.8 when it comes to RCD testing. In the note it says that "Regardless of the RCD type, effectiveness is deemed to have been verified where an RCD disconnects with in the time stated below with an alternating current test rated at residual operating current I△n"

So the minimum requirement is to set your instrument to RCD type AC and carry out the test even if you have a Type A or Type B RCD.

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  • In the BYB, we had two columns: one each for IΔn and 5IΔn. Last week in the BBlB, we had one (for 5IΔn) and debated at some length in here whether (and where) to record IΔn. This week in the BBrB we have one column again, but back to IΔn. I can't keep up, but I suppose that as with the warning notices, there is no prohibition on doing all the normal tests, which hardly takes long at all.

  • in reply to Chris Pearson
    Chris Pearson said:
    Last week in the BBlB, we had one (for 5IΔn) and debated at some length in here whether (and where) to record IΔn.

    I don't agree regards BS 7671:2018+A1:2020 - if the RCD provided additional protection (30 mA or 10 mA), then yes the 5x or 250 mA test.

    But if the RCD provided automatic disconnection of supply (> 30 mA) it would have been either the 1x (TN system) or 5x (TT).

  • in reply to gkenyon

    My apologies for being unclear - I was referring to the generic schedule of test results. IMHO, testing is of limited value if the result is not recorded, but there is room in the "remarks" column. I might add that on the whole I am please that the generic schedule has been split in two - the columns were getting a bit crowded.

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  • in reply to gkenyon

    My apologies for being unclear - I was referring to the generic schedule of test results. IMHO, testing is of limited value if the result is not recorded, but there is room in the "remarks" column. I might add that on the whole I am please that the generic schedule has been split in two - the columns were getting a bit crowded.

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