by ericmark »
Fri Sep 17, 2010 9:05 pm
In any normal system in UK there will be as you say three cables.
1) Feeds power to ceiling rose.
2) Links power to next ceiling rose.
3) Links ceiling rose to switch.
Cables 1) and 2) will link colour to colour but cable 3) should have a red sleeve on the black cable and that black goes to the lamp.
The ceiling rose has 4 connections. One normally a clamp is earth then the double will have sleeved black and brown to lamp. Centre has all reds (these to not connect to lamp). and other side has the two remaining blacks and the blue wire.
The way you have wired will result in a direct short when lights are switched on and no way to switch them off.
In the projects section there are diagrams showing how to connect.