OP
Octopus
My colleague attended to test whole cu as I haven't yet completed all of my 2391 only the practical as I was sick at time of written,
He has issued certif and all looked fine. He said he will return with me Sat to Insulation Resistance test the ring in question but I am thinking could be earth leakage from washer as that's only different appliance added and fault started after this. ?
Why do you need the 2391 to do the testing??