does the bathroom switch have three terminals? They've probably tried nicking a live feed from the switch( presuming its a PIR security fitting) as its near and just put the wire into the wrong terminal, easy to rectify.
I think it was Stevie Wonder that did the electrics. For a year, every time I switched the electric shower on, the smoke alarm went off. Five electricians and a new smoke alarm later, it was still doing it. They resorted to telling me it was steam but it couldn't be cos it was happening the instant you pressed the button on the shower - so no steam had built up.
I almost held one of the sparkies prisoner and stood and nagged at him to please check the actual wiring into the smoke alarm. He kept telling me it couldn't be that, but he eventually humoured me and had a look. Apparently there was an earth wire floating about where it shouldn't have been and I think it was touching one of the live wires. He cut it off and it's been fine since!
is the bathroom light a fluorescent type lamp such as a 2D fitting?
That's what I was gonna do though I wasn't sure about the earth situation - but yeah the holder is plastic and according to the label on the bottom, it's double insulated??
I'll have to go and rummage the bloomin thing out of the bin though - see what happens when you turn your back for five minutes?
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