Hi there, I've tried to change a broken ceiling rose and discovered the following wiring. It's got me baffled and I'm very reluctant to just add in a new rose without understanding what's happening. Ignoring earth, this is what I've found...
There are FIVE 3-core cables entering the rose where I would expect only three.
FOUR red wires arrive the loop terminals, where I would expect only three.
FOUR black wires connect to the neutral terminals, where I would expect only two.
Here's where it gets strange. One of the cables has a red, blue and an unsheathed wire plus either a white or yellow wire which is trimmed short and doesn't go anywhere. On the line terminal the RED wire from this cable is entwined with a black from one of the others. That's a red wire directly connected to a black.
The brown and blue wire departing the rose seem to be connected the wrong way around. The brown is connected to the neutral terminals, and the blue connected to the odd red/black combo at the line terminal.
To add extra doubt that the installation is safe the switched live/neutral in the rose and at the switch isn't sheathed with red.
What do I do? Does this make sense to somebody or is this bad news?
To be clear, the wiring seems to work, just looks very suspicious.
There are FIVE 3-core cables entering the rose where I would expect only three.
FOUR red wires arrive the loop terminals, where I would expect only three.
FOUR black wires connect to the neutral terminals, where I would expect only two.
Here's where it gets strange. One of the cables has a red, blue and an unsheathed wire plus either a white or yellow wire which is trimmed short and doesn't go anywhere. On the line terminal the RED wire from this cable is entwined with a black from one of the others. That's a red wire directly connected to a black.
The brown and blue wire departing the rose seem to be connected the wrong way around. The brown is connected to the neutral terminals, and the blue connected to the odd red/black combo at the line terminal.
To add extra doubt that the installation is safe the switched live/neutral in the rose and at the switch isn't sheathed with red.
What do I do? Does this make sense to somebody or is this bad news?
To be clear, the wiring seems to work, just looks very suspicious.