Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 10 replies
  • Subscribers 34 subscribers
  • Views 1215 views
  • Users 0 members are here
Options
You may also be interested in
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Wiring Choice.

Zoomup

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.

 

 

Parents
  • 0

    Many possible options. Go home and get your test kit since you can't complete the job without testing it anyway probably should be top, in the middle you could have used the new lights as an impromptu test lamp - e.g. L to PE with various switch combinations to see if it either lights or trips an RCD or open up the switch or whatever the 3+E goes to to see what core colours have been used there. Bottom of the list would be using a pair of fingers on the same hand to detect voltages between two terminals (again with varying switch position).

       - Andy.

Reply
  • 0

    Many possible options. Go home and get your test kit since you can't complete the job without testing it anyway probably should be top, in the middle you could have used the new lights as an impromptu test lamp - e.g. L to PE with various switch combinations to see if it either lights or trips an RCD or open up the switch or whatever the 3+E goes to to see what core colours have been used there. Bottom of the list would be using a pair of fingers on the same hand to detect voltages between two terminals (again with varying switch position).

       - Andy.

Children
No Data

Community Rules & Guidelines