I astonished everyone is baffled by a simple lighting circuit.
It's slightly unconvetional, but not exactly complicated.
Copy this drawing.
The ceiling rose with one T&E and one 3 core - connect it as per the right hand light in my diagram.
The ceiling rose with two T&Es at it - Turn off the power to the circuit you are working on and make sure it is switched off.
Firstly you will need a multimeter as you will need to identify which of the black wires is a switched live.
You will need to replace any dimmer switch with a normal switch for testing, if you have made this mistake the dimmer switch will almost certainly have died!!
You will now need to disconnect and separate out the red and black wires to identify which one is a switched live.
If you already know which is the switch wire then you can jump this step. With your multimeter set to ohms range, connect across one of the red and black wires on one cable whilst operating the light switch on/off. If you see the resistance of the meter go from low to high to low etc when the switch is operated then this is the switched live. If not, try the other cable.
Once you have identified which cable is switched live, put a piece of red sleeve over the black wire to signify it is a live. You now need to connect your ceiling rose as per the one on the left in my diagram.
It's slightly unconvetional, but not exactly complicated.
Copy this drawing.
The ceiling rose with one T&E and one 3 core - connect it as per the right hand light in my diagram.
The ceiling rose with two T&Es at it - Turn off the power to the circuit you are working on and make sure it is switched off.
Firstly you will need a multimeter as you will need to identify which of the black wires is a switched live.
You will need to replace any dimmer switch with a normal switch for testing, if you have made this mistake the dimmer switch will almost certainly have died!!
You will now need to disconnect and separate out the red and black wires to identify which one is a switched live.
If you already know which is the switch wire then you can jump this step. With your multimeter set to ohms range, connect across one of the red and black wires on one cable whilst operating the light switch on/off. If you see the resistance of the meter go from low to high to low etc when the switch is operated then this is the switched live. If not, try the other cable.
Once you have identified which cable is switched live, put a piece of red sleeve over the black wire to signify it is a live. You now need to connect your ceiling rose as per the one on the left in my diagram.
