we hold the key for our neighbour in case the alarm goes off etc.
Went off again this morning because the power had failed - main trip had
I thing the wiring is fairly old, although there is a new(ish) CU with RCD.
[I reckon he would be better with a split CU with the lighting and alarm not
on the RCD, to avoid this kind of problem, however he is romantically
involved with his money....]
Something trips out the RCD and all the power goes off.
If I try to reset the trip, it pops again.
If I knock off all the individual trips, the main RCD resets OK and if I
then bring the individual trips back up one at a time everything comes up
I presume that there is a marginal circuit or device somewhere which manages
to trip the RCD when the system is loaded up in a particular way e.g. when
starting all the devices at once by re-powering up the whole CU.
I guess you could diagnose by turning off the trip then powering up all but
one circuit, but I am not sure how accurate this would be, and there are a
lot of combinations.
So is there any easy way to test individual circuits?
I assume whoever fitted the new CU should have checked each circuit before
reconnecting, but then again price was probably the main reason for
selecting the contractor :-)