P
Piratepete
Hi Guys
A Happy 2014 to you all.
I've recently had two calls to trace the cause of intermittent tripping in domestic installations, and failed miserably!
The latest - 4 way box feeding garage, utility room, garden shed. Customer reckons it sometimes trips when they switch the light on, but can trip without any human intervention.
RCD is fine. Also did a ramp test - 22mA Ok.
IR - 1.47 Meg for L+N of all circuits to Earth with everything plugged in. So it's a bit low but not anywhere near low enough to trip the RCD.
Two fridge freezers - I've been told that these are prone to high earth currents - measured under 1 mA.
Washing machine and tumble drier are usually turned off at socket. Doesn't trip while they're running.
Any bright ideas to track this fault, please?
Cheers!
Pete
A Happy 2014 to you all.
I've recently had two calls to trace the cause of intermittent tripping in domestic installations, and failed miserably!
The latest - 4 way box feeding garage, utility room, garden shed. Customer reckons it sometimes trips when they switch the light on, but can trip without any human intervention.
RCD is fine. Also did a ramp test - 22mA Ok.
IR - 1.47 Meg for L+N of all circuits to Earth with everything plugged in. So it's a bit low but not anywhere near low enough to trip the RCD.
Two fridge freezers - I've been told that these are prone to high earth currents - measured under 1 mA.
Washing machine and tumble drier are usually turned off at socket. Doesn't trip while they're running.
Any bright ideas to track this fault, please?
Cheers!
Pete