Hello everyone,
My parents' house was re-wired about 10 years ago, and has a MK Sentry CU with a 30mA RCD as the main incomer.
Until last month, the RCD has only tripped once - when I drilled through a lighting cable causing a N-E short . But it's now happened about 4 times in the last month and resetting all their clocks etc. is becoming a bore now.
It seems to happen at roughly the same time every day, say, between 06:00 and 07:15. They get up at about 6:30, so in other words, sometimes it's before they run a bath/shower and sometimes it's afterwards. It's probably not the central heating, as it's a combi boiler and the problem happened before they switched the CH on for the winter a couple of weeks ago.
My main suspect was the outside lighting circuit which feeds 3 halogen PIR lamps, but isolating those completely has made no difference
Someone suggested that their may be a slight leakage present all the time, and that the voltage surges that occur in the early morning might be the "final straw", causing the RCD to trip.
Any ideas, anyone? I'm tempted to replace the RCD next, just to rule it out of the equation.
Look forward to your clever suggestionsn
Nick.
My parents' house was re-wired about 10 years ago, and has a MK Sentry CU with a 30mA RCD as the main incomer.
Until last month, the RCD has only tripped once - when I drilled through a lighting cable causing a N-E short . But it's now happened about 4 times in the last month and resetting all their clocks etc. is becoming a bore now.
It seems to happen at roughly the same time every day, say, between 06:00 and 07:15. They get up at about 6:30, so in other words, sometimes it's before they run a bath/shower and sometimes it's afterwards. It's probably not the central heating, as it's a combi boiler and the problem happened before they switched the CH on for the winter a couple of weeks ago.
My main suspect was the outside lighting circuit which feeds 3 halogen PIR lamps, but isolating those completely has made no difference
Someone suggested that their may be a slight leakage present all the time, and that the voltage surges that occur in the early morning might be the "final straw", causing the RCD to trip.
Any ideas, anyone? I'm tempted to replace the RCD next, just to rule it out of the equation.
Look forward to your clever suggestionsn
Nick.