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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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  • "Question ... test button before test, or afterwards?" I think a certain Mr Blackwell might have a view on this one

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  • "Question ... test button before test, or afterwards?" I think a certain Mr Blackwell might have a view on this one

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  • in reply to ebee

    In the 8th Ed of GN3 (2018), there was no indication of whether the test button should be pressed before the tripping time test.

    The 9th Ed of GN3 (2020), Section 2.6.18, says:

    Before using a test instrument, the RCD test button should be pressed. This provides basic information that the RCD is functioning, and will help avoid danger that may occur during test if the RCD did not respond.

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