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Toneyz
I would have thought that this would have been ruled out by now.You are correct, but I think @Pete999 is on the case.
Discuss Strange RCD tripping problem in the UK Electrical Forum area at ElectriciansForums.net
I would have thought that this would have been ruled out by now.You are correct, but I think @Pete999 is on the case.
So in layman's terms "a whitewash"Thanks for suggestions. Am in the hospital today so haven't been able to do much more observations.
Murdoch (msg 42) not sure what you mean by "off", but all the internal units have been off for months, and tripping occurs frequently when they are not on.
Devon Chris (43) A/C circuits new and completely separate to everything else. HEating is via conventional boiler, underfloor heating radiators, thermostats, controllers etc. Only control for A/C are the buttons on the units and the remotes.
DPG (44) happy to install rcbo's if that's a solution. In fact discussed with previous electrician possibility of swapping whole CU to rcbo's.
Peter999 (45) as I recall original install only provided statement saying it had been checked and commissioned satisfactorily. Don't recall any technical data. I will recheck. When A/C engineers returned to investigate they left a document stating fault lay with dishwasher circuit.
Elsparko (46) I have been pointing this out to A/C company all along, but they don't appear interested.
Wilko (48) interesting point. There are local external isolation switches like your picture. Now I haven't tested recently but on one of the first occasions red tripped , I was away and my wife rang to say she couldn't reset the tripped rcd. I advised her to isolate using the external switch, and she confirmed she could then reset the rcd. I told the A/C company this in no uncertain terms and even provided their engineer with a written summary including this, but they didn't seem to think it mattered.
Lurch (49) obviously will get professional advice but happy to change some/any/all mcbs to rcbos if that provides a solution.
Murdoch (50) I don't know what a clamp meter is, but I would expect an electrician to have or obtain whatever is necessary?
Thanks again.
Murdoch (msg 42) not sure what you mean by "off", but all the internal units have been off for months, and tripping occurs frequently when they are not on.
Murdoch (50) I don't know what a clamp meter is, but I would expect an electrician to have or obtain whatever is necessary?
Thanks again.
10 minutes ? I had to wait till morningA check on earth leakage is the way to go. You're going to be guessing otherwise. Check leakage on each air con unit.
Took me 10 minutes to type this as I have been drinking since 6pm. Bear with me if I don't make much sense.
Edited this - as just read the DW bit. Please confirm - the DW is unplugged and just operating the DW benchtop isolation switch affects whether the RCD trips?Yes if I isolate the air con external units or turn the air con mcb's off OR leave the air con on and isolate the dishwasher (irrespective of whether it is plugged in or not).
Yes if I isolate the air con external units or turn the air con mcb's off OR leave the air con on and isolate the dishwasher (irrespective of whether it is plugged in or not).
ThanksWelcome to the forum Ian.
In the UK we call them RCBOs.
What I mean is depending how the A/C circuits are installed they may not need RCD/RCBO protection under the regs, but as they type of consumer unit that you have they have had to be installed on one and are adding to the leakage current making it trip.Not sure I understand your questions / comments.
To my simple mind:
Never previously had a single rcd trip. A/C installed by what I believe is reputable experienced company. Almost immediately frequent RCD trips. Could prevent them by isolating A/C both internally and externally. Seemed a no-brainier to me. Called the A/C company who said an electrician should be consulted. Persisted and they sent an engineer who identified the link with the dishwasher circuit.
Since then no-one can work it out and all we have is repeated and sometimes frequent RCD tripping.
I will go with the transfer to all RCBOs if only to avoid disconnection of fridge freezer, internet routers etc.
I would get the A/C wiring tested before you go to the expense of an all RCBO board, or any other expensive moves, seen a lot of A/C electrics thrown in by so called engineers, if it works that's good enough in most cases, how many A/C engineers have you seen with a MFT?Ok thanks. So does that mean I might be able to get the supply split and put the A/C on a new mini CU?
The absence of an MFT could be why there was no Electrical Installation Certificate provided by the A/C installers (that is if I have read the thread correctly).I would get the A/C wiring tested before you go to the expense of an all RCBO board, or any other expensive moves, seen a lot of A/C electrics thrown in by so called engineers, if it works that's good enough in most cases, how many A/C engineers have you seen with a MFT?
Hi think a little different, we also have type B here but all I have seen are 3 phase but sure must be other single phase out there, would think type b would be okay for this applicationHpi type:
Modular devices Hpi type RCCBs - http://www.export.legrand.com/EN/modular-devices-hpi-type-rccbs_63.html
Hpi seem similar to UK type B RCCB - not sure yet if they are the same.
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