I've lived in this house for a couple of years now and I'm in the process of mounting a pair of Sonos One speakers in the corners of my kitchen.
I was working on the premise that I would need to run some cables down the wall to a wall socket, but when I got up to look on top of the cupboard there were two power cables coming from the wall (each cable with L/N/E) going into a inline connector box (similar to https://www.screwfix.com/p/debox-in-line-connector-box/8692h) - Result I thought ...
I bought a new dual socket outlet, and prepared to wire it up. After doing so and plugging in the Sonos ... no dice.
Hooking up a multimeter to the cables I'm getting 180V Live to Neutral, and 180V Live to Earth. I believe I should be getting 240V from a UK mains connection unless I'm mistaken?
I did some more testing, and removed the cables from the socket to rule that out, and it looks like only one of the cables is actually live - the other 'live' cable doesn't give me any voltage at all.
Do I need both to get to 240V or is there something else at play here?