Hi,
I've encountered an unusual lighting wiring situation and would like a second opinion on whether I'm interpreting it correctly.
The below interpretation has been derived from purely looking at the two main lights and switches, I've not lifted floorboards etc.
The room is a lounge/diner, with a main light at each end, a switch at each end, and previously had 3 wall lights, which have long-since been plastered over.
Starting with the bottom half of the diagram there is a single 2-core-and-earth cable coming in to the switch, wired normally, that controls the dining room light; the dining room is at the end of a loop-in circuit.
The top half gets more unusual, the switch has 3x 2-core-and-earth cables coming in and 1x a 3-core-and-earth cable coming in.
(In the below diagram circles represent separate cable blocks where the appropriate cores have been wired together.)
The bulb as you would expect for the middle of a loop-in lighting circuit has 3 cables, two of which are the normal 2-core-and-earth, but also has a 3-core-and-earth cable coming in.
The bulb would appear to be wired normally apart from the rogue blue core coming from the cable.
1) I interpret this to be that the wiring between the main lounge bulb and switch was done using the wrong sort of cable and someone just wired the blue core in to stop it floating.
2) On the switch, I interpret that someone has mostly taken out the wall lights from the switch itself (which would have once had 2 switches, one for the main bulb and one for the wall lights), but has wired in the blue core to stop it floating as previously mentioned and left in a single red wire from one of the 2-core-and-earth wall lights, serving no purpose.
My thoughts on the ways forwards is to
1) temporarily disconnect the blue core from the 3-core-and-earth cable at both ends
2) re-wire the rogue red wire from the 2-core-and-earth wall light into the twisted blocks
3) Assuming switch & light works correctly, then re-wire the blue core to stop it floating
All feedback gratefully received...
I've encountered an unusual lighting wiring situation and would like a second opinion on whether I'm interpreting it correctly.
The below interpretation has been derived from purely looking at the two main lights and switches, I've not lifted floorboards etc.
The room is a lounge/diner, with a main light at each end, a switch at each end, and previously had 3 wall lights, which have long-since been plastered over.
Starting with the bottom half of the diagram there is a single 2-core-and-earth cable coming in to the switch, wired normally, that controls the dining room light; the dining room is at the end of a loop-in circuit.
The top half gets more unusual, the switch has 3x 2-core-and-earth cables coming in and 1x a 3-core-and-earth cable coming in.
(In the below diagram circles represent separate cable blocks where the appropriate cores have been wired together.)
The bulb as you would expect for the middle of a loop-in lighting circuit has 3 cables, two of which are the normal 2-core-and-earth, but also has a 3-core-and-earth cable coming in.
The bulb would appear to be wired normally apart from the rogue blue core coming from the cable.
1) I interpret this to be that the wiring between the main lounge bulb and switch was done using the wrong sort of cable and someone just wired the blue core in to stop it floating.
2) On the switch, I interpret that someone has mostly taken out the wall lights from the switch itself (which would have once had 2 switches, one for the main bulb and one for the wall lights), but has wired in the blue core to stop it floating as previously mentioned and left in a single red wire from one of the 2-core-and-earth wall lights, serving no purpose.
My thoughts on the ways forwards is to
1) temporarily disconnect the blue core from the 3-core-and-earth cable at both ends
2) re-wire the rogue red wire from the 2-core-and-earth wall light into the twisted blocks
3) Assuming switch & light works correctly, then re-wire the blue core to stop it floating
All feedback gratefully received...