Strange RCD Fault

[Guest569]

80amp main switch RCD, occasionally trips when a couple of circuits are switched on (doesn't matter which circuits) with nothing plugged in.

IR tests all good. Replaced RCD for new. Happens in all weather ( don't think its external )

Only sockets on this consumer unit.

Ive had my guys out at it twice with no joy. New build wiring from 16th edition.

Im going to investigate myself this week, Im sure Ive had loose connections causing tripping before, it about all I can think of, a loose tail somewhere around the main switch.


Anything else to look out for ?

Im pretty certain its not a dodgy nail at floorboard etc its fairly new property and in good condition with chipboard throughout.

 

[Plonker 3]

If you have wet leafs blowing against connections, then that is surely instant dismissal leaving a connection exposed like that?

 

[Guest569]

Simple fault....lol. Plenty would be scratching there head at this one.

Just to clarify...I had a spark and a labourer at the job for 3 hours. I popped in for 1 hour with no test gear to check the obvious....I go back friday and armed with the correct gear I WILL find it..

This is all assuming my guys have done the procedures as they should have ....kinda hoping they have not

The customer has complete trust in me, so please concentrate on your own customer relations !

 

[Meggerman]

Have you done 250V I/R L&N-E with everything plugged in and switched on.

 

[dazza1981]

Have you tried a earth fault wet leaf impedance test!!!!

 

[Guest569]

If you have wet leafs blowing against connections, then that is surely instant dismissal leaving a connection exposed like that?

another great assumption.....its not our install.

 

[Plonker 3]

I never said it was.

 

[Guest569]

I never said it was.

So wtf are you talking about instant dismissal for ?

 

[Meggerman]

So wtf are you talking about instant dismissal for ?

**** answering that, answer my question

 

[Plonker 3]

Because it would be surely wouldn't it?

what you getting so defensive about it for? Was it really you who did it?

 

[jaypp]

there could be more than 1 fault. eg continuity (ring) + n-e fault (but not 'dead short'), hence 'boys' missed it. be good to know findings JRC

 

[Guest569]

So...The wet leaf thing ....Would any procedures by the experts show this ?


Exactly. Far to many variables to solve over the internet....

I appreciate the advice but don't appreciate posts that assume I know nothing !

Typical of this forum though.

 

[DPG]

Jesus this forum is a joke.

Im more than experienced in domestic fault finding than most on here. Dealing with "council spec" rewires for over 10 years Ive seen it all.


If anyones actually cares to read my initial posts, we have been through the basic procedures and this is not a simple fault. Its guaranteed something bizarre....

Perhaps wind blowing a wet leafy tree on to a dodgy connection somewhere outside ? Just one example that could not be found by any procedure listed so far by the experts ...

Bizarre faults do happen, and I'm certain this one is a strange one ...hence title.

This forum is pretty pathetic, everyone far to quick to assume the OP hasn't got a clue !

You seem to have seen it all and know it all - so go fix it then. Daz

- - - Updated - - -

So...The wet leaf thing ....Would any procedures by the experts show this ?


Exactly. Far to many variables to solve over the internet....

I appreciate the advice but don't appreciate posts that assume I know nothing !

Typical of this forum though.

You keep moaning about this forum, but you keep coming back. Daz

 

[Guest569]

Because it would be surely wouldn't it?

what you getting so defensive about it for? Was it really you who did it?

Cause I find you a bit of a ----- to be honest. You have nothing constructive to say, only attempted digs so jog on.

 

[Plonker 3]

You seem to have seen it all and know it all - so go fix it then. Daz

He did go to fix it but couldn't.

 

[Guest569]

**** answering that, answer my question

L/N-E with everything plugged in is something I have not tried actually thanks !