It's an occasional nuisance trip. Only happens as the kitchen
fluorescent light is turned off, never any other time. It's turned off
pretty well last thing at night so there's very little else still
running to add much background leakage.

Any thoughts why turning something off should cause this.

--
Mike Clarke

Mike Clarke wrote:

It's an occasional nuisance trip. Only happens as the kitchen
fluorescent light is turned off, never any other time. It's turned off
pretty well last thing at night so there's very little else still
running to add much background leakage.

Any thoughts why turning something off should cause this.

Yep. Too sensitive RCD for the capactive load to earth.

Uprate the RCD (100mA?) and fit RCBO's to the circuits that need real
shock protection.

Mike Clarke wrote:

It's an occasional nuisance trip. Only happens as the kitchen
fluorescent light is turned off, never any other time. It's turned off
pretty well last thing at night so there's very little else still
running to add much background leakage.

Any thoughts why turning something off should cause this.

Also check your light switch is not in the return (i.e. neutral) rather
then the feed.

--
Cheers,

John.

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