I am trying to wire a new ceiling switch in my loo. It's a 2-way switch but I need to wire it for 1-way. I connected the earth cable to L1 and the red and black cables to L2 and common. When I turned the power back on the switch was on and the light worked. I switched the light off. When I tried to switch it on again it wouldn't come on.
Can anyone tell me what I've done wrong? Should I disconnect the earth cable and if so, what do I do with it?