I have a switched Emergency Bulkhead 500mm away from the CU, wired staight into the same MCB as the properties ground floor lighting circuit.
A normal light switch sits across the Live.
This light is not required to be an Emergency Light, it has been installed to provide light in the cupboard where the CU sits, in the case of a power failure.
When switching 'off' the live (to make the light come on) the RCD will sometimes trip.
There are 4 other Emergency Bulkheads throught the property spurred from the lighting loop circuits, with Test Switches - the RCD does not trip when these are isolated/tested from the test switch.
I have replaced the switch, but still get the tripping.
A normal light switch sits across the Live.
This light is not required to be an Emergency Light, it has been installed to provide light in the cupboard where the CU sits, in the case of a power failure.
When switching 'off' the live (to make the light come on) the RCD will sometimes trip.
There are 4 other Emergency Bulkheads throught the property spurred from the lighting loop circuits, with Test Switches - the RCD does not trip when these are isolated/tested from the test switch.
I have replaced the switch, but still get the tripping.