In ground patio lights

[hoover]

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

 

[telectrix]

pond flex for one. gel filled wiska boxes for two.

 

[Dustydazzler]

Rubber flex in plastic kopex conduit properly glanded and all joints gel / resin filled

i personally rarely get involved with buried lighting these days as 99.99% of the times no matter how hard one ties water gets in and bangs out the house rcd