I didn't turn the mains off when changing my extractor fan, figured as long as I didn't cross wires I'd be fine. Wrong. But then the lad who did the job properly didn't turn off the electric either, how's that work? Magnets?
You might have had it switched on when tried to put the wires in? Hard to understand why anyone wouldn't switch the power off to the circuit they're working on.
I didn't turn the mains off when changing my extractor fan, figured as long as I didn't cross wires I'd be fine. Wrong. But then the lad who did the job properly didn't turn off the electric either, how's that work? Magnets?