So there I was in the corner of a loft. I had two 1.0mm2 T&E cables to wire up for two new 240 Volt shower room ceiling lights that replaced some old 12 Volt faulty ones. The new ones covered the ceiling holes nicely. But, how to easily wire them in?
Ah, there is a convenient junction box that connects to the extractor fan, great I will just wire into that. It will have a permanent L which I don't need. It will have a N which I do need. And it will have a light switch controlled switch L which I do need. But wait, the grey and black are not sleeved or tagged with coloured tape. Is grey N or switched L? Is black N or switched L?
Well if it was installed by an old boy it is likely that black is N. But it may not be. If I wire up the lights reversed polarity they will still work but the install will not be compliant. I have no tester with me and the circuit is turned off while I am working on it. What did I do?
Z.
