- Reaction score
- 9,016
with the main isolator OFF and the circuit breakers turned on,
Check voltage is 0v on the outgoing L-N of the main isolator.
then check resistance between L-N of the same terminals, if there is nothing switched on then it will read open circuit.
I suspect there will be something drawing power. heating timer, outside light on pir, smoke alarms etc.
Check voltage is 0v on the outgoing L-N of the main isolator.
then check resistance between L-N of the same terminals, if there is nothing switched on then it will read open circuit.
I suspect there will be something drawing power. heating timer, outside light on pir, smoke alarms etc.