Can anyone tell me if the lighting circuit for my first floor is all on 1 MCB then does the mean they all share a same neutral wire? Reason I ask is because I am installing a Smart WiFi light switch that requires a neutral cable. I am able to get a neutral cable to the light switch from another light pendant in the passage which is on the same MCB, will this work or do I have to bring the neutral back from the actual light that the switch is going to control?