I replaced the old rewireable fuse box in my house back in December 2004 (obviously!) with a Wylex split consumer unit, with the immersion heater and up and down rings on the RCD side.
All has been well since then, but yesterday evening I had a nuisence trip of the RCD. I turned off the MCBs, reset the RCD and turned on the MCBs, and all was well.
But this morning it happened again! (The name is well chosen, it is a darned nuisence!).
Nothing has changed for many months, the house isn't leaking water (despite the downpours we've been having) and as far as I know there aren't any rodents in the building. The immersion heater is on a timeswitch, and both times the switch would have been off (I checked the timer this morning to confirm that), so I don't think that's the source of the problem.
How on Earth do you set about tracking down the cause of something like this? If it was solid fault I imagine it's just a question of isolating circuits, then going round the dodgy one looking for the problem, but when it's intermittent like this what's the technique?
Cheers,
Howard
All has been well since then, but yesterday evening I had a nuisence trip of the RCD. I turned off the MCBs, reset the RCD and turned on the MCBs, and all was well.
But this morning it happened again! (The name is well chosen, it is a darned nuisence!).
Nothing has changed for many months, the house isn't leaking water (despite the downpours we've been having) and as far as I know there aren't any rodents in the building. The immersion heater is on a timeswitch, and both times the switch would have been off (I checked the timer this morning to confirm that), so I don't think that's the source of the problem.
How on Earth do you set about tracking down the cause of something like this? If it was solid fault I imagine it's just a question of isolating circuits, then going round the dodgy one looking for the problem, but when it's intermittent like this what's the technique?
Cheers,
Howard