Hello -
I recently had to replace a light fitting, so I switched of the lighting circuit at the MCB in the consumer unit, then carefully checked that the light wasn't working any more. After dismantling the fitting, I also checked that there was no measurable voltage in the circuit with a multimeter.
The thing that worries me is that while fiddling around with the bare wires, the RCCB in the consumer unit tripped. Is this because the MCD only switches the live wire and I inadvertently shorted the neutral wire to earth? Do I have to de-energize the entire house just to work on one circuit? Is this normal, or is there perhaps a fault in my house's wiring?
Thanks