Recent content by jd9

Thanks ericmark for your reply. Do you think selective use of RCBO on each circuit in turn would at least find which circuit has the neutral fault? Perhaps an electrician could disconnect each circuit in turn and repeat my tests to find the culprit? At least I feel better informed to understand...

Many thanks to spark123 and ericmark for their help. As suggested, I have carried out some more tests as follows: 1. With no power applied to Consumer Unit, 80A\30mA RCCB will stay in either ON (closed) or OFF (tripped) position. The TEST function (obviously) has no effect. 2. With all load...

Cheers Spark123...thanks for the info on the manufacturer - I was assured it was 'good quality' by the installer. If no circuits were connected at all other than the supply, would the 80A 30mA still trip when the power goes off (or the 100Amp 100mA breaker is manually tripped)?

I need some help to understand how my Consumer Unit should react to an interruption to the electricity supply to my house... My Distribution Board has a 100A 100mA Time-delayed RCCB Incomer feeding 80A 30mA RCCB. When the electricity supply to the house fails, the 80A 30mA RCCB trips to OFF...