On Monday, 31 August 2020 15:24:25 UTC+1, Jim GM4DHJ ... wrote:
Last two times I have came to the static van the power has been
cut....the internal off on switch with rcds is on but the rcd in the
external meter box has been tripped.....when we leave the only thing we
leave on is the fridge everything else is switched off.....I'm thinking
that the farmer has cut the grass around the van when we are not here
and I was wondering if the splatter of wet grass against the plug and
socket could be causing the external rcd to trip ?....or is it the fridge?

The only way to answer that is to test everything for earth leakage. If you don't want the expense of a megger, there are 2 cheap options
1. a multimeter sometimes detects failing insulation
2. You can also make a tester using just Rs & a neon.


NT