Hi all, so my in ground patio lights keep tripping the RCD. I checked them over and found dampness in most of the buried underground three way junction boxes. On inspection I have found this is not the only issue. There are 10No. Lights in total and although when the fittings themselves are opened up they look pretty dry, I have found that the manufacturers flex is giving low readings between core approx 0.04m ohms. This results in each light having an earth leakage of about 7 milli amps. So times 10 = 70ma trips 30ma RCD. I find it strange the flex that came with the light is giving low IR readings but that’s certainly the case. Can anyone recommend a better short piece of waterproof flex and what’s the best 3 way underground junction boxes out there.
Thanks in advance
Thanks in advance