use an rcd tester if you know some one who has one or im sure you could prob hire one
tests are
50% of the rated trip current of RCD shouldnt trip in each half cycle
100% of the rated trip current of RCD should trip the RCD in each half cycle
should trip within 200ms
500% or the rated trip current of RCD should trip the RCD in each half cycle within 40ms
functional tests on and off and test switch
if RCD is 100mamps or above only 1/2 times and 1x tests should be used
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