Posted 6 hours ago

Replacing a fluorescent light with candescent one

I have seen lots of videos to change a fluorescent light to LED but not to candescent / standard.

I am familiar with how a ceiling rose is connected and it looks simple enough for a simple situation as below as it is a single kitchen light.

I haven't taken the light down yet so my question is, how do I identify the switch cable if it hasn't got that small brown or similar identifier?

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  1. melted's avatar
    The one in my kitchen only has a single cable going to it because it was originally converted from a ceiling rose and is wired from a junction box above the light because the original wiring wouldn't have been long enough to reach the connector terminal block in the fitting, which doesn't have a loop connection provided anyway.

    A switch wire is usually wired to the live terminal, you can test for continuity using a multimeter with the power off and the light switch on then off, since the switch will short the permanent live and switched live together, alternatively you could use a neon screwdriver.

    if there's a cable looped to the next light, the in and out will be wired matched colours together L-L-Lswitch, N-N,E-E, and the permanent live from the switch cable will be connected to the other two lives, and the switched live wire will connect to the live terminal of the fitting. (edited)
    mutley1's avatar
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    i was thinking that i could switch the light switch off with the power on and use my multimeter to test if there is current and if there isn't in one of the live, then that has to be the switch live. actually looking at the diagram, it doesn't really matter which is the switch live as the power live and switch live both go into the loop. it is only the switch neutral that i need to identify as that needs to go into the line socket.

    what would be the implication of connecting the neutral wires the wrong way round? the neutral for the power feed goes into the line and the neutral for the switch cable goes into the neutral port in the photo?
  2. Willy_Wonka's avatar
    Is this for one of your rental properties?