老铁推荐几个网站老铁推荐几个网站,恋夜视频全部支持安卓us恋夜视频全部支持安卓us,老湿机免费x影 院老湿机免费x影 院

发布日期:2021年03月05日
Replacing ceiling lights

Discussion in 'Electricians' Talk' started by RobT21, Feb 4, 2020.

  1. Enayat Ahmed

    Enayat Ahmed New Member

    Not sure what you mean? This is what I did:

    - Changed living room ceiling light - this works normally
    - Changed downstairs hallway light - this is 1way and operated by the 2G 2W switch. this is working normally
    - Changed upstairs hallway light - this is 2way and operated by the switch referred to above and a switch on 1st floor
     
    老铁推荐几个网站老铁推荐几个网站,恋夜视频全部支持安卓us恋夜视频全部支持安卓us,老湿机免费x影 院老湿机免费x影 院
    #41
  2. terrymac

    terrymac Screwfix Select

    Ok ,we have one light fitting ,upstairs hallway ,and it is permanently on. Two switches control it ,one on landing and one downstairs. They are the switches you have just renewed. If you go and flip upstairs switch ,then go to downstairs switch and flip that, does light still stay on ?
    If it does show pics of the wiring at the light fitting.
     
  3. Enayat Ahmed

    Enayat Ahmed New Member

    Tried what you said and light still stays on. Do you want pics of the upstairs hallway? If so, I will have to do this tomorrow.
     
    老铁推荐几个网站老铁推荐几个网站,恋夜视频全部支持安卓us恋夜视频全部支持安卓us,老湿机免费x影 院老湿机免费x影 院
  4. terrymac

    terrymac Screwfix Select

    Before you fitted the new light on upstairs hall way ,did the original light fitting work ok with both switches ?
     
  5. Enayat Ahmed

    Enayat Ahmed New Member

    Yes it did.
     
  6. terrymac

    terrymac Screwfix Select

    And before new switches were fitted ,did you do anything at all with the wiring at the old switches ?
     
  7. 老铁推荐几个网站老铁推荐几个网站,恋夜视频全部支持安卓us恋夜视频全部支持安卓us,老湿机免费x影 院老湿机免费x影 院
    Enayat Ahmed

    Enayat Ahmed New Member

    Nothing at all. Followed your instructions above and only operated the fittings to take a pic.
     
  8. terrymac

    terrymac Screwfix Select

    Need to see the wiring at the light fitting . And double check you have not mixed up the wires at the switches when you fitted the new ones.
     
  9. Enayat Ahmed

    Enayat Ahmed New Member

    Ok will do all of this tomorrow. Do I need to do anything with downstairs light? Could there be a permanent live wire there for upstairs?
     
  10. terrymac

    terrymac Screwfix Select

    The downstairs light isn't an issue.
    For the landing light to stay on permanently ,it has to have a permanent live connected at the fitting itself. That can come from the switches ,or from the circuits
    live supply.
    There is something odd here ,and it may be worthwhile buying a multimeter.
     
  11. Enayat Ahmed

    Enayat Ahmed New Member

    What will I be checking with the multimeter?
     
  12. terrymac

    terrymac Screwfix Select

    Continuity on dead circuits ,and possibly live testing voltages present.
     
  13. terrymac

    terrymac Screwfix Select

    Is there any third switch ,that operates the upstairs landing light ,maybe on a higher floor level ?
    Are there any wires ,in the switches mounting enclosures ,that are terminated in insulated terminal blocks ,not connected to the switch, just sitting
    In the enclosure ?
     
    Last edited: May 18, 2020
  14. terrymac

    terrymac Screwfix Select

    If the answer to both the above questions is no ,you will need some spare connector blocks ( terminal strip's)
    So you can seperate the three red wires in the light fitting ,as one of them must be bringing a permanent supply to the switched line.
    And don't worry about buying a multimeter.
     
  15. Enayat Ahmed

    Enayat Ahmed New Member

    The answer is no to both questions. I have come connector blocks so will try that solution tomorrow. If I separate the red wires would that not affect the next ceiling light or the upstairs switch?
     
  16. terrymac

    terrymac Screwfix Select

    You ,at some point , established that one of the black conductors at the light fitting was the switched live ,and connected it to the fittings live terminal. Follow that black conductor to the grey sheathing that it comes from. The red conductor that is in the same grey sheathing ,needs to be seperated from the other two reds ,and put in a terminal block on its own. The other two reds go together ,as they are.
    Tell me the result. If my theory on how your set up is wired is correct ,all other lights will work and so will the troublesome one ,switching on and off as it should.
    By the way are all your lights on one fuse ,or do you have more than one lighting circuit ,and two fuses ?
     
    Last edited: May 18, 2020
  17. Enayat Ahmed

    Enayat Ahmed New Member

    Thanks, will give that a go some time today. Downstairs and upstairs lights have separate fuses.
     
  18. Enayat Ahmed

    Enayat Ahmed New Member

    Hi Terry, I followed your instructions and it works now! I checked all lights in the house and they all turn on/off as normal. Would that single red wire not affect anything? Thanks again for all your help.
     
  19. terrymac

    terrymac Screwfix Select

    Glad your sorted ,got there in the end !!
    The other end of that red wire is connected to the com terminal on the upstairs switch ,and so is the switched live ( black ). That com terminal is only live ,when you use a switch to turn your light on ,voltage goes thru the black ,the other end of it is connected to the live terminal on your light fitting !!
    Because the red cable was connected in the terminal block with two other reds ( one of which is a permanent live)
    It made the com terminal permanently live ,and the black obviously permanently live to the light fitting.
    It's not conventional wiring ,as you would normally find in a ceiling rose ,but it's not dangerous. It would confuse the hell out of anyone working on it ,LOL !!
    You can do one of two things....
    Disconnect the red from the com terminal at upstairs switch ,and put it in a terminal strip ,loose in the back box,leaving the other end of it as it is now ,in a terminal block on its own within the light fittings base.

    Or at the light fitting ,put the red in the live terminal with the black switched live.

    I would suggest you do the first option ,
    As that would have it disconnected at both ends ,and more obvious to anyone in future.
     
  20. Enayat Ahmed

    Enayat Ahmed New Member

    I will do the first option as you suggest. What are the risks if I leave it as it is?
     

Share This Page