Her wiring was done 20 years ago and developed an earth fault .Narrowed it down to the kitchen so waiting a week to see if the breaker stays on with the kitchen circuit out. Back about Monday and taking the insulation test kit. The damn thing had corroded batteries in due to lack of use since i retired but fixed it now.
I did find that of the 2 ring main circuits, the electrician had the earths of one circuit connected to the earths of the other. This would make no difference as they are linked in the board anyway. It did confirm that the installer had not tested his work at all.
I have spent 50 years as an electrician so a good chance i will find the fault !. It was a speciality within our family business which continues through to its 3rd generation. The next one joining this business might be a girl but a male has arrived last year if the girl wants a different job.
The odd electrical jobs i do now get hampered by the false knee and not able to kneel down. Light fittings get hampered with worn out shoulders.
I am pretty good at sitting in front of the TV though. Tomorrow, the chinese scooter parts are being installed but this job will spread over a 3 day period i expect. Pretty basic mechanicals but the bodywork takes some time to refit.