hey all im having a bit of trouble wiring up a ceiling switch ready for my shower to be fitted every-time i try to test the switch it trips all my electricics and everything cuts out.. the ceiling switch, mcb and cable to the loft was already fitted by a competent electrician back when i had the house re-wired and worked fine with the supply wires only attached and when i pulled the cord the neon light came on but soon as iv connected the load out wires and tried the cord again all my electrics trip. the wire to the shower unit is hanging free out of arms way from the ceiling at the minute would this need be attached to the shower? not attached the shower yet because i need to tile the wall before a fit the shower but i wanted to get the wiring in place ready so i can tile accordingly ...