I'm boarding my loft, raising the floor. As the floor is going over an old disused aerial booster, I disconnected it first. I had assumed it was somehow spliced into the lighting circuit, but through trial & error at the breaker box I found it was actually using the "downstairs sockets" circuit.
I already planned to add a socket above the floor for convenience, and had intended to tackle this at a later date, but I'm now wondering if I can re-use this somehow and connect a socket before I board over it. I'm not sure why it's a 4-core wire though (I'm no electrician).
That looks like its for a mains operated smoke alarm. (It looks like 1mm 3 core and earth)
As for socket, depends what you are going to plug into it. If it's a light (no point) or a low wattage device yes, you can. But there is always the what if. In which case I wouldn't. 1mm is too small for sockets.
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