ring main problem

[ANT68]

I changed a cu yesterday, dual rcd board, everthing going well until rcds start tripping. Done insulation resistance on circuits, readings low. Found one dodgy cable, but started to tie myself in knots, going back today so any advice would be appreciated

 

[Guest123]

Hi

Was it definately on the ring circuit??? have you checked for a borrowed neutral on the lighting circuits???

 

[ANT68]

Thanks Lenny, was a burrowed neutral.Thanks again for the advice!!

 

[Benn]

The amount of times I have had this problem on a CU Change is unreal.

Borrowed neutral on the lighting circuit. Put that on my Headstone.

 

[bugsy]

Keep calm and carry on test each circuit n/e make sure the n go to the correct n bar process of elimination.
Did you do n/e test before starting