you should connect a 2 core and earth to any of one of the swithes connect the brown wire to L1 and the blue wire to L2 working to BS 7671 you should identify the blue wire with brown tape or sleeving because L2 is allso swith live as L1 is switch live this first cable is coming from your light because the other end of this cable will be connected to the lighting cicuit as the L1 is connected to live with the bulb wire and L2 the blue wire ( dont for get to work to the regulations BS7671 sleeve it ) is connected to the loop section which is directly live that is why the main power cable coming from your fuse board is connected as blue neutral and the bulb neutral is connected to this brown live to looping circuit .now for the two way switch use 3 core and earth the colours are brown,grey,black connect the first end of the cable to the first swith brown to L1 these are now 2 browns and connect the black to L2 with the blue wire then you have the grey which you connect to the COMMEN connection of the switch then the other end ofthis cable to your two way or 2nd switch brown to L1,black to L2,and finally grey to commen. dont for get to connect all your earths to the earthing points this is very cruissal to the regs.wish u luck
digital dan, October 2008
