Back in 1995, we rewired and have three consumer units one with RCD protection for power and two smaller non RCD boards mainly for lighting but also powering the alarm and a single socket (with it's own built in RCD) supplying a distribution board for the phone system and fax machine.
We've had our share of nuisance tripping from faults in fridges, washing machines etc, either picked up by elimination and also at the PAT testing we do.
However we still have the occasional trip which occurs when we switch on or off a light switch which are on the non RCD boards. We've a lot (about 120) of fluorescents in 4x36W suspended ceiling luminaires and typically a switch would switch two i.e 8 tubes but there are a couple where four i.e. 16 tubes are switched. There's no pattern to it but it definitely coincides with switching on or off.
My 30 year old physics A level is not allowing me to understand why this might occur. Is there anyone who could give me an explanation I might understand.
Thanks
We've had our share of nuisance tripping from faults in fridges, washing machines etc, either picked up by elimination and also at the PAT testing we do.
However we still have the occasional trip which occurs when we switch on or off a light switch which are on the non RCD boards. We've a lot (about 120) of fluorescents in 4x36W suspended ceiling luminaires and typically a switch would switch two i.e 8 tubes but there are a couple where four i.e. 16 tubes are switched. There's no pattern to it but it definitely coincides with switching on or off.
My 30 year old physics A level is not allowing me to understand why this might occur. Is there anyone who could give me an explanation I might understand.
Thanks