RCD TRIPPING

[choccy]

Hi there I got called to a property with a problem rcd. Tried to test rcd and it was tripping straight away at 1/2 test so tried ramp test and trips right off, so change to new rcd and it is working good( all usual test done to confirm this)

The problem now is, that now with a proper working rcd we are getting random tripping with no one thing tripping it ( even tripping through the night when nothing on apart from the usual fridge ect )

After some checking of turning appliance on and off I thought i had it with it tripping when ever you put the dishwasher on, but unplugged it to see how we got on for a few days and low and behold the problem has returned.

Any thoughts would be great thanks in advance.

Sorry ment to say no dusk to dawn lights if any one was thinking on that track cheers

 

[NozSpark]

Have you done any IR tests?

If so what were the results

 

[choccy]

not yet hope to be back at the property tommorrow to start disconnecting and doing some IR testing.

 

[steptoe]

Have you done any IR tests?If so what were the results

why do people not even do very basic tests before posting,

or for that matter costing their customers money on an RCD that maybe didnt even need changing,

IR and ramp are the very minimum tests before even considering changing an RCD.

 

[betty swollocks]

^^^^+1

 

[choccy]

did do basic tests and one of them as posted before was a ramp test and it was tripping the rcd right away and also tripping at half test which indicates that the rcd is not functioning properly. that was half test with no ;load on the rcd side of the board and it was tripping at half which is a no no.

so please read post properly before you slate someone who is looking for a little help and maybe some of the forums experience.

so thanksX(

 

[steptoe]

did do basic tests and one of them as posted before was a ramp test and it was tripping the rcd right away and also tripping at half test which indicates that the rcd is not functioning properly. that was half test with no ;load on the rcd side of the board and it was tripping at half which is a no no.so please read post properly before you slate someone who is looking for a little help and maybe some of the forums experience.

so thanksX(

sorry,

I must have missed the sentence where you did the IR test then.

Im not slating you,

just stating the obvious.

BTW, did you actually do a ramp test or as your OP states a 1/2 X test,?

there is a marked difference.

 

[batty]

Is the Rcd in a split board or one Rcd for whole house. What circuits does it control?

 

[choccy]

if steptoe reads the post i have said that i tried to do ramp test but it just tripped the faulty rcd right away. and as the client was reluctent to get the fixed appliances removed from the circuits no ir test were conducted until a more suitable time and it has been done so far free of charge as this is a friend. and it is a split board and the problem seems to be coming from the kitchen circuit.

 

[steptoe]

try doing the tests properly,

you cannot properly test an RCD with stuff plugged in,

you may as well **** in the wind going about this the way you are,

do an IR test, then do a ramp test, then start plugging stuff in and see where the ramp drops.

easy really.

 

[batty]

Calm down Choccy. If you have a fault it generally will trip the Rcd when testing. Rcd's can go faulty but generally it will be a faulty appliance or wiring.

 

[choccy]

its good night time as steptoe is starting to act like his avatar, and giving me some of hercules's offloads:z:z

 

[steptoe]

WTFDIEB

 

[kme]

`cos you like to try and help, Albert, as far as I am aware.

Choccy: you don`t HAVE to remove fixed loads for IR; link P&N (it doesn`t matter what is between them for an RCD trip issue). You`d have to remove all loads from the RCD to test correctly. What Albert was getting at is that an insulation test IS a basic test, and should have already been carried out.

 

[m4tty]

try doing the tests properly,you cannot properly test an RCD with stuff plugged in,

you may as well **** in the wind going about this the way you are,

do an IR test, then do a ramp test, then start plugging stuff in and see where the ramp drops.

easy really.

Can you do the ramp test from any socket or at the rcd? And when the ramp drops you've found the appliance which is leaking to earth causing rcd to trip?

Just trying to learn

Cheers

 

[steptoe]

Can you do the ramp test from any socket or at the rcd? And when the ramp drops you've found the appliance which is leaking to earth causing rcd to trip?Just trying to learn

Cheers

personally I always do RCD test at the RCD itself,

and once you have carried out the very basic test of IR you know the cable is OK so then doing the ramp as you plug each item in should give you a good indication of a high leakage(faulty?) appliance.

remember though that perhaps a washing machine etc may only show up as having a high reading once it has been on for a while,

lots of variables so you can really only be sure of the wiring in the end.

 

[kme]

Concur