hi spent all day wiring downlights and now 2 out of 4 dont work couldnt get to light circuit, so spurred of ring main into a FCU with a 5 amp fuse then into 20amp 4 terminal junction box including switch. From there Daisy chain wiring into 4x50w mains downlights. No 1 works No 2 works No 3 Dosn't :c...