Today a tripping problem in a new build property purchased 8 days ago, I measured ~100KΩ L-E.
It turned out to be rain getting into an outdoor FCU feeding the garage, non sealed back entry T&E from the kitchen socket ring.
The CU:
Note how PV & EV charge point switched off due to not yet fitted despite being part of the property spec.
& meter box
The Neighbour (moved in December 2023) had the same problem (of tripping when it rained), hopefully the liberal quantities of clear silicon sealant added to both FCUs by one of the site staff has sorted the issue.
Neighbours CU:
It turned out to be rain getting into an outdoor FCU feeding the garage, non sealed back entry T&E from the kitchen socket ring.
The CU:
& meter box
The Neighbour (moved in December 2023) had the same problem (of tripping when it rained), hopefully the liberal quantities of clear silicon sealant added to both FCUs by one of the site staff has sorted the issue.
Neighbours CU: