Strange MCB Tripping

[newsparky]

Afternoon all,

Got called out to look at some external lights in a block of flats as management company said they were not working.
They are operated by a C10 MCB and wired via a photocell.
When I reset the MCB and cover the photocell the lights are all fine.
After speaking to a couple of tenants they said the lights just switch off over night.
First assumed it may have been rain as 2 lights were smashed so replaced them.
IR tests are all fine so am a bit stumped as to why they randomly trip the MCB over night?
All suggestions would be much appreciated.

 

[Guest125]

I think I just wet myself LMFAO!! UKES your humour is wasted here. That was so funny. Magic. Please don't ever leave this forum.

Thank god. I was beginning to wonder.

 

[micknew]

Exactly. What I done is dissect his post although I fully understood what he meant but because he did not use the exact terminology correctly decided to try and make him look stupider than he really is. In effect I made myself look stupid. Davesparks seems to do this a lot to other people.

My God your clever.
But you know that don't you, the truth hurts get over it.