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Old Oct 5th 2017, 4:02 pm   #16
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Default Re: Nuisance Electricity Tripping

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Originally Posted by snikpoh View Post
We're on 5.75 as well.

ICP is/was 25A

Main RCD is 32A
OK, so we've been having these trips for 10 years now and you say I simply need to change the main trip RCD to 32 amp ?
The smart meter was installed only 2/3 years ago.
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Old Oct 5th 2017, 4:11 pm   #17
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Default Re: Nuisance Electricity Tripping

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Originally Posted by Loco Pedro View Post
25amp
That is not enough for 5.75kW potencia and you should change it to a higher rating. Very easy and cheap to fix. I hope this will cure your problem.

I am very surprised your electricians did not ask about this?
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Old Oct 5th 2017, 8:11 pm   #18
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Default Re: Nuisance Electricity Tripping

Hola

Over the years, I have had the electric trip out for no reason. However earlier this year it became weekly or more frequently so I had the main trip switch itself changed and had no further problems.

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Old Oct 6th 2017, 9:19 am   #19
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Default Re: Nuisance Electricity Tripping

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Originally Posted by Dxf View Post
Hola

Over the years, I have had the electric trip out for no reason. However earlier this year it became weekly or more frequently so I had the main trip switch itself changed and had no further problems.

Davexf

I am informed that 25 amp should be sufficient for 5.75 kW potencia (= 23 amp).
25 amp is on the limit for this supply, but it isn't our consumption which causes the trips (so I am informed by an electrical engineer).
However, I'm interested to know if you uprated your fuse or merely changed it for a new one.
I guess they can get old and tired, but our trips are no more frequent now than they have been for 10 years.

Last edited by Loco Pedro; Oct 6th 2017 at 9:22 am.
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Old Oct 6th 2017, 4:11 pm   #20
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Default Re: Nuisance Electricity Tripping

Usually if the RCD trips without any of the other circiuts tripping its an earth leakage/insulation breakdown problem. We had spate of these when one of the elements in the cooker was on its way out. As it's so intermittant its probably not a practical proposition to isolate each circuit in turn to identify the culprit. Most common device after the cooker is an immersion heater. A good tip was the faulty RCD itself. If you can't work it out then you will need a qualified electrician with an earth leak detector (bridge megga). Don't hire the one who says it could be anywhere in the neighbourhood as the RCD works on the downstream side.
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Old Oct 7th 2017, 6:17 pm   #21
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Default Re: Nuisance Electricity Tripping

I can't see how a sparks would tell you the problem could be somewhere in you neighbourhood , your RCD protects your circuits and no one else's.

have you tried isolating a circuit at a time when it's being trip happy by flipping the MCB, do you have many outside electrics , lights etc as water from rain or condensation will trip a RCD,
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Old Oct 7th 2017, 8:00 pm   #22
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Default Re: Nuisance Electricity Tripping

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Originally Posted by Loco Pedro View Post
I am informed that 25 amp should be sufficient for 5.75 kW potencia (= 23 amp). ....
But 5.75kW isn't 23A @ 230v (which is the mains voltage in Spain), it is 25A. Divide the watts by the voltage to get the amps.

So your 25A breaker is right on the edge, and the advice you were given earlier, to uprate it, is the correct advice.
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Originally Posted by Longlegpete View Post
I can't see how a sparks would tell you the problem could be somewhere in you neighbourhood , your RCD protects your circuits and no one else's. .....
Well if something causes a voltage spike then the current would also increase and could trip the breaker, especially as it is literally on the edge of the required value.
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Last edited by Pulaski; Oct 7th 2017 at 8:03 pm.
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Old Oct 7th 2017, 9:06 pm   #23
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Default Re: Nuisance Electricity Tripping

The RCD is not a MCB , the amps are a rating for the maximum potential to run through the RCD it's not as with the MCB a current rating for it to blow, presuming the RCD is tripping when they are away as has been said they are not drawing huge current anyway, the RCD simply measures leakage to earth
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Old Oct 7th 2017, 9:23 pm   #24
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Default Re: Nuisance Electricity Tripping

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Originally Posted by Longlegpete View Post
The RCD is not a MCB , the amps are a rating for the maximum potential to run through the RCD it's not as with the MCB a current rating for it to blow, presuming the RCD is tripping when they are away as has been said they are not drawing huge current anyway, the RCD simply measures leakage to earth
Ooops, yes.

I have that issue with one circuit. It only feeds two pairs of sockets, and I have replaced both sockets and the RCD breaker, and the problem still persists. My electrician says it is likely a manufscturing flaw in the cable or a bad instalation - a nail or screw through the cable somewhere. But I am not interested in having the house torn apart to have a new cable installed.
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Old Oct 8th 2017, 7:54 am   #25
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Default Re: Nuisance Electricity Tripping

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Originally Posted by Longlegpete View Post
I can't see how a sparks would tell you the problem could be somewhere in you neighbourhood , your RCD protects your circuits and no one else's.

have you tried isolating a circuit at a time when it's being trip happy by flipping the MCB, do you have many outside electrics , lights etc as water from rain or condensation will trip a RCD,


Oh - if only it were "trip-happy". We could have solved it years ago.
Trips occur day or night, winter or summer, rain or shine, everything connected, nothing running - and can be 2 or 3 times in 1 day or not for 2 or 3 months.
When we go away, we empty the freezer, unplug it and the immersion heater. But we almost always return to a "tripped" supply after a few days or week - but sometimes not.
Its that erratic.
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Old Oct 8th 2017, 8:08 am   #26
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Default Re: Nuisance Electricity Tripping

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Originally Posted by Pulaski View Post
But 5.75kW isn't 23A @ 230v (which is the mains voltage in Spain), it is 25A. Divide the watts by the voltage to get the amps.

So your 25A breaker is right on the edge, and the advice you were given earlier, to uprate it, is the correct advice.

Well if something causes a voltage spike then the current would also increase and could trip the breaker, especially as it is literally on the edge of the required value.


This seems like a very logical explanation and tends to support the theory that the fault is not necessarily "downstream" and could be the result of external influence - i.e. voltage spikes, which I believe are common here in the campo especially.
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Old Oct 8th 2017, 8:47 am   #27
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Default Re: Nuisance Electricity Tripping

If you can't find a fault then maybe it's a faulty RCD ? , also on your consumer unit do you have 3 phases coming in?

We sometimes get the RCD trip, in fact it went yesterday but we had a few hours of very heavy rain so could have been a mains spike but that's the first time in around 9 months , any priority services ie, alarm I've put on a none RCD protected circuit, still protected by MCB but not a problem if we are away, we live in the UK so this is often the case
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Old Oct 8th 2017, 8:53 am   #28
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Default Re: Nuisance Electricity Tripping

Apart from the RCD you will most likely have a number of fuses, mcb's protecting various curcuits.

Try turning off each circuit in turn for as long as possible ( days ) and see if the RCD still trips
If it does then the turned off circuit is unlikely to be the suspect, if not you have narrowed the problem down.

Hopefully there is only one suspect circuit.
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Old Oct 8th 2017, 10:11 am   #29
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Default Re: Nuisance Electricity Tripping

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Originally Posted by Fredbargate View Post
Apart from the RCD you will most likely have a number of fuses, mcb's protecting various curcuits.

Try turning off each circuit in turn for as long as possible ( days ) and see if the RCD still trips
If it does then the turned off circuit is unlikely to be the suspect, if not you have narrowed the problem down.

Hopefully there is only one suspect circuit.


This is not a practical option as we can go for weeks/months without a trip.
As for incoming phases, I have no idea.
Its a regular 5.75kW supply to a house in the campo - as far as I know.
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Old Oct 8th 2017, 10:44 am   #30
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Default Re: Nuisance Electricity Tripping

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Originally Posted by Loco Pedro View Post
This is not a practical option as we can go for weeks/months without a trip.
As for incoming phases, I have no idea.
Its a regular 5.75kW supply to a house in the campo - as far as I know.
5.75 is defo single phase.

ISTR 5.2 is 3-phase
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