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  • FIRST POST
    • maas
    • By maas 11th Aug 18, 11:26 AM
    • 476Posts
    • 324Thanks
    maas
    New ceiling light, Live and Neutral both black?
    • #1
    • 11th Aug 18, 11:26 AM
    New ceiling light, Live and Neutral both black? 11th Aug 18 at 11:26 AM
    I have a new light fitting which has 3 wires, yellow and green (earth) and then 2 black wires.

    Does that mean either live or neutral from the mains can be connected to either one?
Page 1
    • that
    • By that 11th Aug 18, 11:48 AM
    • 755 Posts
    • 415 Thanks
    that
    • #2
    • 11th Aug 18, 11:48 AM
    • #2
    • 11th Aug 18, 11:48 AM
    so it has 5 wires? How about a picture?

    in most cases the live and neutral wires can be swapped, especially on lights.

    The only danger of swapping wires is that if a device uses a single pole switch and you try and fix it while it is plugged in AND switched it is off that the whole circuit is still live and may get shocked if you touch stuff. You wont be doing this and many an engineer or technician repairing stuff will be aware of this

    some devices have a neutral and two lives connections, one live is for 110v system, and the other live is to be used on 240v
    Last edited by that; 11-08-2018 at 11:51 AM.
    • maas
    • By maas 11th Aug 18, 12:06 PM
    • 476 Posts
    • 324 Thanks
    maas
    • #3
    • 11th Aug 18, 12:06 PM
    • #3
    • 11th Aug 18, 12:06 PM


    Larger here

    Thanks for that, I have just read somewhere that on certain light fittings the polarity does not matter.

    I've actually bought 3 of these light fittings (different sizes) and I've just opened another one up and its again just got the earth and 2 black wires.
    • Jonesya
    • By Jonesya 11th Aug 18, 1:26 PM
    • 1,538 Posts
    • 945 Thanks
    Jonesya
    • #4
    • 11th Aug 18, 1:26 PM
    • #4
    • 11th Aug 18, 1:26 PM
    Is the black covering on the wires, a black sleeving? If so you might be able to pull it back slightly to see if there is brown or blue insulation visible on the wire near the connector.
    • EssexExile
    • By EssexExile 11th Aug 18, 1:59 PM
    • 3,271 Posts
    • 2,320 Thanks
    EssexExile
    • #5
    • 11th Aug 18, 1:59 PM
    • #5
    • 11th Aug 18, 1:59 PM
    They often have L & N printed on the connecting block, with that fitting though it doesn't really matter.
    Tall, dark & handsome. Well two out of three ain't bad.
    • maas
    • By maas 11th Aug 18, 2:06 PM
    • 476 Posts
    • 324 Thanks
    maas
    • #6
    • 11th Aug 18, 2:06 PM
    • #6
    • 11th Aug 18, 2:06 PM
    They often have L & N printed on the connecting block, with that fitting though it doesn't really matter.
    Originally posted by EssexExile
    It actually does have the markings engraved on the connecting block, thanks for that!

    I'd just been focusing on the wire colours
    • traineepensioner
    • By traineepensioner 12th Aug 18, 9:35 AM
    • 278 Posts
    • 155 Thanks
    traineepensioner
    • #7
    • 12th Aug 18, 9:35 AM
    • #7
    • 12th Aug 18, 9:35 AM
    I have a new light fitting which has 3 wires, yellow and green (earth) and then 2 black wires.

    Does that mean either live or neutral from the mains can be connected to either one?
    Originally posted by maas
    Yes, just make sure you connect the earth to the yellow green.
    No longer trainee
    Retired in 2012 (54)
    State pension due 2024 (66)
    • Risteard
    • By Risteard 12th Aug 18, 1:09 PM
    • 913 Posts
    • 343 Thanks
    Risteard
    • #8
    • 12th Aug 18, 1:09 PM
    • #8
    • 12th Aug 18, 1:09 PM
    Polarity is important with Edison Screw lampholders other than all-insulated BS EN types. The centre pin must be connected to the phase conductor.
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