rcd tripping

[i=p/u]

i got call today saying rcd tripping one side of the board, he called when i was passing , so i popped in and tuned all switches off and turned on one by one and leads me to the fused spur for the gas heating... anyway left to monday now ...... what would you logical approcah be to this, i will start from scratch, has anyone anytips to speed me up as i am slow as a donkey when comes to this fasult finding.... thanks

 

[i=p/u]

its a condensing boiler and apparently its pretty new......

 

[i=p/u]

could i just swap to non rcd side,, what is the risk factors with this???

 

[cjp1]

could i just swap to non rcd side,, what is the risk factors with this???

This is something I would never recomend doing because you only hide the problem and could possibly be the cause of a fire .
There is nothing to say that you dont have a low resistance fault between live and earth that will trip a mcb anyway.
at present the RCD could be tripping first because it is more sentive to live/earth & neural/earth faults.
If you think it could be a problem with the rcd then test the rcd as normal you could also ramp test the rcd to see what current it actually trips at.
If the rcd test is good you could Isolate supply and try removing the feed to the pump first and see if this makes a difference.

 

[Deleted member 9648]

You should IR test all circuits.....even if turning something off/on appears to stop/cause the tripping.... RCD's are funny things and the problem may lie elsewhere. Only a full IR test on circuits connected to the tripping RCD can truly eliminate other causes.

 

[malcolmsanford]

could i just swap to non rcd side,, what is the risk factors with this???

Are you telling us that you have left someone without heating and if it's a combi most likely without hot water over the weekend, and there is a non protected side of the CU available?

 

[telectrix]

or is the boiler spurred off the RFC, more info required on this one , PU.

 

[i=p/u]

well this is what i was getting at, i thought i should of done this, but ive never even installed never mind fix a heating circuit.... its only the rcd for the circuits tripping,

Are you telling us that you have left someone without heating and if it's a combi most likely without hot water over the weekend, and there is a non protected side of the CU available?

 

[i=p/u]

aye it has it own breaker....when you get to the fcu, it has a feed going to boiler in cuboard and there is a coonection i think going to thermostat.....

or is the boiler spurred off the RFC, more info required on this one , PU.

 

[telectrix]

if it ain't tripped over the weekend with the boiler FCU off, then it's time to get a heating engineer in. we all know I=P/U and pipework don't do well together.

 

[i=p/u]

if i did just move to non rcd side would the breaker still tripp, any science behind this if awnser is yes, as for pipes, tiptoe round them from now on

 

[telectrix]

if it's on it's own circuit, try it on the non RCD side, but don't be surprised if it goes ---- up and the house ends up looking like thailand. as i said, if the FCU for the heating is off all weekend and no trip, then pass it over to the wet wipers.

 

[i=p/u]

but would the gas dude not just saym ive checked everything , its the thermostat which is part of the electrical system, im giving up this job as i havent enough epierience and he still ows me for fitting a bathroom fan.. i dont like to ask for cash i like to be remembered. but if i fixed this problem i would say you ow me for fitting and supplying bathroom fan......aswell

 

[i=p/u]

and of course learn a bit

 

[ufkir]

was at one this morning same thing happening turn on heating fcu rcd tripped disconnected pump and m/valve turned on heating fcu rcd tripped, turned out boiler needed constant feed for fan run on disconnected fan at boiler turned on no trips faulty fan inside boiler.no heating or hot water till at least tuesday

 

[telectrix]

the fan, thermostat, pump are all part of the heating system and as such need to be left to whoever looks after the heating. your responsibility as an electrician ends at the FCU