RCD tripping

[tamdee]

Any tips. Installed new consumer unit.
Both circuits of lights are tripping RCD.
Both on same side.
Loads of transformers on both circuits but switched off at switch.
Any help of previous would help.

 

[Murdoch]

Do you have a Electrical installation certificate covering the new fuseboard?

 

[tamdee]

Do you have a Electrical installation certificate covering the new fuseboard?

Some testing done but have to leave working for customer so some temp stuff done.

 

[Murdoch]

My top tip is to never install dual RCD fuseboards

 

[Philip01]

Are both neutrals on the correct side, and why are they on just one RCD is this because of the two way switch and a borrowed neutral

 

[Andy™]

as someone else once said on here, if you havent found the fault, you havent done enough testing

 

[Andy™]

also worth noting that dual RCD boards dont really comply and never have done, there just the cheap option

 

[kerching]

also worth noting that dual RCD boards dont really comply and never have done, there just the cheap option

I mentioned that onceBut what do I know? I am neither a reti.............

 

[binky]

test for continuity between the neutrals, or liven one lighting neutral and look for a live neutral on different cct with all the other ccts off - the last bit being the non recommened version

 

[SPECIAL LOCATION]

Any tips. Installed new consumer unit.
Both circuits of lights are tripping RCD.
Both on same side.
Loads of transformers on both circuits but switched off at switch.
Any help of previous would help.

Insufficient dead testing done prior to energising circuits in my opinion...

Either low IR on one or more circuits and/or neutrals cross connected between circuits..
or combination of both..

 

[Murdoch]

House? Bungalow, flat? Masionette ?

 

[Sharpend]

House? Bungalow, flat? Masionette ?

Oh hello, just on rightmove were you!

 

[Murdoch]

Oh hello, just on rightmove were you!

trying to understand the type of property ….

 

[Sharpend]

Any old outside lights?

 

[Murdoch]

Looped at switches or lights?

Pendants or down lights?

 

[Andy™]

next door borrowing a live from somewhere?

 

[Sensai]

Were the lighting circuits on RCDs prior to the new ones being installed? Did you do an EICR before the work and what were the results for the lights?

 

[BorisJ]

Do you have a Electrical installation certificate covering the new fuseboard?

Fuseboards have not been fitted this century. He clearly said (correctly) it was a consumer unit.

 

[BorisJ]

also worth noting that dual RCD boards dont really comply and never have done, there just the cheap option

How come? Please state why they have never complied. They have been installed in their thousands.

 

[BorisJ]

Any tips. Installed new consumer unit.
Both circuits of lights are tripping RCD.
Both on same side.
Loads of transformers on both circuits but switched off at switch.
Any help of previous would help.

Switching off at the switch doesn't always help as most switches switch the line only leaving the neutral. Finding faults of this type require methodical searching with the right test equipment which you probably don't have. A job for the sparks that installed the CU.