RCD keeps tripping in kit

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BS83

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RCD keeps tripping, so far I’ve had the RCBO (?) replaced. All the electrics are brand new wiring and new CU (I hope I’m using the right terms). A socket has also been replaced.

It’s happening on the kitchen ring. The appliances already in situ were a dishwasher, washing machine and fridge freezer (all brand new) ie it was tripping before I bought brand new small kitchen appliances. Once the socket was replaced it went a week and it tripped again and I was able to reset it.

There’s no pattern to the previous trips and it doesn’t happen immediately on using any of the appliances or multiple ones at the same time. It’s also happened when nothing has been plugged in.

Any ideas what could be causing it? Please also explain it to me as if I have no idea what things mean (because I don’t, I’m trying to learn as I go).

Thanks in advance.
 
Mate had similar and it was where a double socket was screwed to tiles and not flat. The stress when tightening the screws bent the double socket face plate causing random trips.

As above. Get electrician back. Could be anything causing the trip. Needs investigating
 
Wayners said:
Mate had similar and it was where a double socket was screwed to tiles and not flat. The stress when tightening the screws bent the double socket face plate causing random trips.

As above. Get electrician back. Could be anything causing the trip. Needs investigating
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It’s interesting you say this, all the sockets don’t sit flush (apart from the one which has been replaced). I have brick style tiles - my previous suspicion was it was a socket, and also wondered if it’d actually all of them (the fittings are cheap - I bought a new refurb house)
 
Mate run extension from upstairs to lounge tropical fishtanks when he was away for more than 24h because of random trips on downstairs circuit.

Not happened in year's after this one socket was replaced but made flat
 
If the sockets don't fit flush, there could be something going on behind - like a bunch of wires getting pinched, or some crud interfering with something.
 
sparkwright said:
If the sockets don't fit flush, there could be something going on behind - like a bunch of wires getting pinched, or some crud interfering with something.
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Thanks - a kettle is near one of them so I’m wondering if it’s the steam interfering?
 
I check the leakage,
Diffrence line neutral 8 Feb 24 reduced.jpg
for the whole house, but it does show all circuits together have an 8 mA leakage, so well within the 9 mA allowed for each RCD/RCBO, but to measure is the only way, and can't see why you should buy the meter. As said
Jurassicspark said:
No one can say for sure. Get the person back to fix the issue.
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The major problem is the likes of frost free freezers have timers, which turn on the defrost heaters, so we have to test neutral to earth with a different meter
VC60B.jpg
as it will only show on the first meter, when the freezer goes into defrost, but an extension lead to an outlet on a different RCD/RCBO should show if it is the heater on a frost free freezer.
 
"All electrics are brand new"
Could you elaborate on that statement a little bit?
Some of use are taking it to mean a complete rewire of everything and that might well be the case but sometimes people just mean, for example, sockets, switches and the like replaced.
However something is not right here.
Sockets not fitting correctly leads to a good suspicion in the first instance, it may well be pointing to the answer but it could be coincidental too.
We really need to know the full extent of what has and has not been done and it really needs the person who installed it all to investigate it.
 
Re-reading, I am also unsure,
PartID_CU.jpg
technically a RCBO is a RCD, with the MCB combined in it, but not sure if you're getting a MCB and RCBO mixed up? A RCBO will have a test button.
BS83 said:
I bought a new refurb house
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I am now thinking you had nothing to do with the re-wire? However, you should have the installation certificate, which should say who did the work.

I would have said once a building has changed hands, any electrician who has worked on the house, is no longer obliged to correct anything you find wrong. As he has no contract with you. Google "Pembrokeshire EICR court case" and we see how an electrician was taken to court. And fined as a result, but the buyer did work for Pembrokeshire country council, but the offence was fraud, and unclear to if the buyer actually got any compensation. So the reports are next to useless.

We are told when buying a house we should get an EICR done, however I had a home buyer's report, which did highlight some problems, but would not say it was an EICR, it did not go deep enough. If one considers 30 sockets on a ring final, and it takes 5 minutes to remove and replace a socket, that's 2.5 hours. So it is unlikely all sockets are removed.
BS83 said:
It’s also happened when nothing has been plugged in.
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If this is the case, then my idea of a frost free freezer being a likely problem, is wrong. But it seems odd that anyone would unplug their freezer. My kitchen has three independent supplies, the ring final, the cooker supply, and the UPS (uninterruptible power supply) to my freezers. So I can plug essential items into different supplies, there are two RCBO's and two RCD sockets supplying my kitchen.

However, this is not normal, my house also split side to side with the ring finals, so I can run extension leads without any cables going up/downstairs. However, some homes have a rather poor design, where it is really hard to feed items from an alternative RCD. If the design is poor, then looking at the testers I have already shown, each tester cost me £35, however I had my daughter come over, and I tried to explain how to use them, and it became apparent I was not explaining well enough. So it may be only option is to get an electrical. The second of the two meters shown, uses 250, 500, or 1000 volts DC to test, the latter two can damage things, so some skill is required.

However, with some pictures we still may be able to help. So picture of the consumer unit is a good start.
 
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