rcd triping

[fusedfx]

the rcd on my cu keeps tripping (not on lsd) ... lol. Have narrowed it down to 1 of the lighting circts. Part of the house was rewired 3 yrs ago and lights cicuit was part of re-wire. Can anyone tell me what would cause this after this period of time??????????

ps: can not get hold of company that did this for me

pps: how could i test circuit??
any advise would be great................

 

[ColJack]

does the circuit have and outside light on it?
if so then it's leaking and has water or damp in it..

is the circuit one that feeds the bathroom or kitchen? same thing.. condensation in the light..

have you changed any lamps recently?

does the circuit feed the upstairs lights? there may be a leak in the roof..

have you hung any pictures recently?

lost a pet gerbil or mouse?