PMSL

Gareth, i do it like that as thats how i been taught. If a earth wire comes off the metal light fitting there is no protection at all on that light. It has a chance of becoming live if a diyer has fitted it and the live also pops out and touches it. The MCB will not trip if this happens as the earth aint there!!!!! Peeps thinks bulb has gone and touches the light...bang!!! If the lights go through the RCD as soon as he touches it the RCD will trip before he fries!

I know its unlikely to happen but i do everything to how ive been taught, and the SAFEST possible way...as after all im a bricklayer by trade Gareth, i have just learned many other trades too