RCD tripping, but with no fault

[roukel01]

Morning All

I was called to a property the other day. Dual RCD board. One of the RCD's is tripping most mornings between 4am - 6am.

Check the board, only 4 circuits connected to that RCD, 1 socket circuit (upstairs sockets), 1 lighting circuit, smoke alarm circuit and outbuildings supply.

Tested all of the circuits seperatley, all readings above 5 Meg Ohms.

Couldn't find anything wrong anywhere, this has only just started to happen too, but it ONLY happens between 4am - 6am. Nothing plugged in thats on a timer etc.
Tested RCD out, and that seemed to be working as it should

Any ideas?

 

[keniff]

Last one I had like this it was a loose neutral on the central heating valve! Took a few days to find isolating different circuits lol

 

[44ALLAN]

baked in a pie?....
or is that blackbirds?

pigeons breasts...........oooo errrrr missus luverly I tell you

 

[GLENNSPARK]

pigeons breasts...........oooo errrrr missus luverly I tell you

this is it...
cheaper to grab a few from the local pigion fancyers garden hut....

 

[Geordie Spark]

my garden is full of bird feeders so no probs..................magpies/cats beware tho as I have a very strong air rifle ( as some pigeons relations can testify too lol

Oh aye ......... PLEASE shoot the Magpies - after their recent performance they deserve no less !!!!

 

[44ALLAN]

Oh aye ......... PLEASE shoot the Magpies - after their recent performance they deserve no less !!!!

For an average of 60k a week each they did canny man !!!
My flippin phone has neva stopped from my mackem mates about blaydon races and punchin the fkin horse!!!
He lives 5 mile from me and I might just punch him if I see him the a'ole lol

 

[GLENNSPARK]

Oh aye ......... PLEASE shoot the Magpies - after their recent performance they deserve no less !!!!

performance has got nowt to do with it.....