First time in years could not find fault

[chris day]

split load DB

Every circuit (7circuits) 1st half tripped RCCD

And two circuits second side tripped The 1st RCCD whist the second RCCD supplying these circuits remained on??

Swapped over the RCCDs to prove the units were not faulty.

Removed every neutral to prove borrowed neutral not at fault still tripped.

Any suggestions guys as I am the second sparky with a damaged ego on this one

 

[Squid]

I was reading this thread and was thinking of posting up that you should ask the customer has anything changed recently has any work been carried out etc etc and then got to your post about the brand new washer dryer.

Lesson learned I hope ;o))))