I moved into a brand new property and have started replacing some of the light switches with dimmers. when I removed the old switches I was supprised to find that the lighting ring was taken to the switch rather than the ceiling rose. to put it another way for a single gang switch 3 twin+earth cables go to the switch 2 for the ring and one going to the ceiling rose with the 3 earths and 3 neutrals joined in a loose terminal block in the back box.
Is this a normal way to wire the circuit? if not is it legal?
I always thought the ring went to the ceiling rose and a single cable to the switch.