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I found little of any real help, but just of the off chance....
Our power trips sporadically, like once every 2-3 weeks....
Its got annoying enough that I now have our NAS box on a UPS to ensure safe shutdown...
We went away on holiday for 10 days, and my smart heating told me that it was having trouble connecting about a week in, usually a sign that power (and so internet) has gone down.
This meant that the freezer went off, and not on until our return wasting a load of food...
The trip cause seems to be on the plug sockets according to the trip switches that are going, but I honestly have no idea what is causing it, and it's so infrequent its being really difficult to find what is actually causing it.
Any bright suggestions as to how I might make reasonable steps to diagnose such a infrequent trip cause?
Other than keeping 'everything' off, and only turning them on when needed until I narrow it down 3 years later.....
No simple way other than switching off each circuit in turn (for say a fortnight) to try and find which one is causing it.
Another solution is to replace the MCU with one where each circuit has its own RCD - but that's going to cost a bit to implement....
it was out actual trip switch int eh electic board that caused our intermittent trips.
i had all teh plugs and appliances out at regular intervals for months until i got someone in to test the network
Blooming nightmare TBH, especially if it's very sporadic. Any old wall sockets, or even extension leads in areas where you could get damp ?
One recent "trip" had me looking everywhere, but I knew it was down stairs sockets. Narrowed it down to the wall socket for the fridge/freezer. Another time it was an extension lead that the dryer was plugged into (lives in the porch so may have got damp). Another time, the electrician had wired an outside security light into a fused spur off the upstairs sockets. Turned out the 'weatherproof' connector had let water in.
Any old wall sockets, or even extension leads in areas where you could get damp ?
Wife's old flat, which was let out, had this problem. Alanl, from STW, traced it to an extension plug block under the fridge which had condensate drip on it....
what is tripping? Mcb, rcbo?
Insulation and resistance test with a megga or similar. IR gun on all appliances may tell a story. Also on sockets.
Any items on a timer or only kick on everyso often due to thermostats or simialr?
Just get a spark round to test everything, be might not find anything but at least that rules out each of your rings/spurs and all the sockets/switches connected to it.
The fact it tripped whilst you were away narrows it down to stuff that wasn't turned off at the wall, and things like PIR lights outside
Unplug everything apart from the freezer when you go on holiday. I know it's something that old people do... and not needed as much these days... but if you know something is up somewhere, it's a simple thing to do to protect your food (or potentially help you narrow down on the fault).