I was looking at changing a ceiling light fitting only to find the existing supply cable consisted of a yellow, dark blue and green wire. Wondering has anyone came across this before? Replaced the light fitting as per existing with green to earth, dark blue to neutral and yellow to live. Light working ok but concerned with possibility of reverse polarity. Any advice most welcome.
Appreciate it will still work. Ceiling light rather than lamp of a socket. Just concerned if changing bulb and light switch doesn't stop power to the light.
The only problem you may have with polarity is the type of bulbs. If they are the screw in type then the live should be connected to the centre terminal of the bulb ,neutral to the outer. If reversed ,then the outer metal casing of the bulb would be live , though it would still function in so much as the bulb would still work.
That could well be the case Keith, especially if 2 way switching is involved. I changed a pendant this morning where the live was yellow, (although that wasn't 2 way!)