Sonoff light switch wiring

Discussion in 'General Chat' started by Sandman, Nov 30, 2017.

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  1. Sandman

    Sandman
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    i am about to order a sonoff light switch and have read they require a neutral wire to operate. I’m pretty sure I have this but can someone look at the picture below and confirm please? There seems to be 3 sets of twin and earth wires and I’m guessing the neutral ones are the blue ones in the connector block.
    Should wiring the sonoff switch be straight forward?
    9B5A87D1-98DB-4006-A9DB-43991A8EABB8.jpeg
     
  2. Sonic67

    Sonic67
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    Yep they look like neutrals to me. Odd they are at a switch but hey ho.
     
  3. Sandman

    Sandman
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    Perfect thanks. I will test with a multi meter to make sure. Am I right in thinking that the neutral will have a constant 240v regardless of switch position?
     
  4. Sonic67

    Sonic67
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    Neutral to earth will be zero. It's usually connected to Earth somewhere.

    Live to Neutral or live to earth will be 240v(ish).
     
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  5. ufo550

    ufo550
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    Tis the 'modern' way of wiring lighting now a days, 'cos of downlights and people wanting wifi light switches. What's wrong with getting orrffh your arse? Only joking!

    OP can't find any downloads for those switches, but does appear you have a neutral conductor at your switch. You will also have to establish which are the live conductors, as opposed switch line. I would assume its the two in the common terminal, but you should never assume anything. Make sure you practise safe isolation :smashin:
     
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  6. Howsmydiving

    Howsmydiving
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    I have just received my first Sonoff 2 way light switch but I have older wiring in my house, which includes a blue neutral I believe, can someone please help, I just need a wiring plan for the Sonoff switch based on the images which show the current switch, the new switch and the instruction sheet. The green earth is at the top of the image. I would be really grateful for any help. I am in the U.K.
     

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  7. ufo550

    ufo550
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    I fear from your last pic, it looks as if you haven't a neutral at your light switch. A 3&e core cable has been installed to switch two different lights. You may have to employ the services of an electrician, should you wish to use this device.

    If I am correct, the person who installed you old switch, failed to mark the yellow & blue wires with red sleeving or tape, that may have prevent you from assuming the blue wire was a neutral.
     
  8. Howsmydiving

    Howsmydiving
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    OK, thank you, I will do that. This was fitted before I moved in so I can only guess.
     
  9. ufo550

    ufo550
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    The wiring of the original switch is pretty much standard fare. Some electricians (very few) don't feel the need to mark wires with sleeving, even though it is a requirement within BS7671 (Wiring Regs). But obviously, your example is one reason why it should (apart from the obvious!).

    Older houses, were wired in this way, loop in (live/neutral) loop out at the lighting point, live & switch live to the switch.

    Nowadays, its more practicable (not always) to provide a neutral at the switch, rows of downlights and 'intelligent' switches, e.g.
     
  10. aVdub

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