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  1. #1
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    Light Dual Switch: WEG5002K

    I have 2 power switch like those connected to a light : Electrical Construction Material | Panasonic Electric Works Sales (Thailand)

    It has 4 "connectors", but what is the connection diagram ? basically you can turn on and off the light with the switch being on different position. Quite convenient.

    But I want to add a dimer, which is basically a normal switch and I don't know how to integrate that one with the dual position switch ? is it possible or do they always need to be in pair ? that is two dual position switch connected serially ?

  2. #2
    lom
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    I guess what you have is what is called a stair switch but they should be 3 pins.
    Got its name because they are often used on each side of a stair and yes they are used in pairs and you can not substitute one of them with a dimmer.
    You can however add a dimmer to the circuit while keeping both of them.

  3. #3
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    damn, this is going to be a wonderful thread

    next BF?

  4. #4
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    You cannot use a normal dimmer that way, because they are "normal switches".

    I don't know if there are dimmers which have integrated two way switches, I doubt it.

    There are however energy saving lamps with an integrated dimming function which basically go to different light levels when switched on/off several times in a short period. You could trigger those with your existing switches.

    What's the reason you want to dim? Are you aware, that dimming does not save any significant amount of energy, because normal light bulbs or halogen lights massively reduce their alredy low efficiency when dimmed?
    "don't attribute to malice what can be adequately explained by incompetence"

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    Quote Originally Posted by lom
    You can however add a dimmer to the circuit while keeping both of them.
    Yes you could but you can dim with this configuration only from one point. And if you switch off at the dimmer you cannot switch on from the other location.

  6. #6
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    Quote Originally Posted by lom View Post
    I guess what you have is what is called a stair switch but they should be 3 pins.
    Got its name because they are often used on each side of a stair and yes they are used in pairs and you can not substitute one of them with a dimmer.
    You can however add a dimmer to the circuit while keeping both of them.

    good call, yes the 4th connection is for the relay of the live to another switch,

    ok makes sense for your suggestion, didn't think about that. So how do I source the second switch from the dimmer ? forgot to add that the dimmer has only 2 connection, very annoying.

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    Quote Originally Posted by Takeovers
    What's the reason you want to dim? Are you aware, that dimming does not save any significant amount of energy, because normal light bulbs or halogen lights massively reduce their alredy low efficiency when dimmed?
    noted, but it's for pure visual comfort, some of those halogen are too strong so they need to be dimmed. It's 150W 220V btw

  8. #8
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    Quote Originally Posted by Takeovers
    Yes you could but you can dim with this configuration only from one point. And if you switch off at the dimmer you cannot switch on from the other location.
    that would be ok actually, and a good compromise. Could you show the circuit schema I would need to implement ? on the switch I found this:

    |--|
    |
    0
    / \
    / \
    1 3

  9. #9
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    ___________
    Neutral---lightbulb3w-switch___________3w-switch----dimmer +

    But it really hurts me to even think of using a 150W Halogen and then dimming it. Replace it with a lower value. I think 80W should be available.

    Oh this looks not remotely like what I saw when i typed it.

    Another try

    Neutral
    I
    I
    I
    Lightbulb
    I
    I
    Three way switch
    I I
    I I
    I I
    Three way switch
    I
    I
    I
    Dimmer
    I
    I
    I
    +

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    Quote Originally Posted by Takeovers
    I think 80W should be available.
    I wish, couldn't find one, they are the small ones for special lamps, only in 150W or 100W

    like also the liberty to choose the dim level,

  11. #11
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    After your previous escapades into the realm of the qualified tradesman I suggest politely that you call in an electrician on this occasion. At least if the Thai guy kills himself you have a great thread, if you kill yourself we lose a valued member of the board

  12. #12
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    Quote Originally Posted by Takeovers View Post

    Another try

    Neutral
    I
    I
    I
    Lightbulb
    I
    I
    Three way switch
    I I
    I I
    I I
    Three way switch
    I
    I
    I
    Dimmer
    I
    I
    I
    +
    not sure I can differentiate between Neutral and Live,

    I have 2 Red wires and 1 Blue coming into the dual, I suspect the Blue is the Live

    there is still 1 wire missing in the mix, where does it get sourced ? on the other switch ? there is one yellow but it's connected to another "normal" switch,

    Let me upload the pics,

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    Quote Originally Posted by Spin
    After your previous escapades into the realm of the qualified tradesman I suggest politely that you call in an electrician on this occasion. At least if the Thai guy kills himself you have a great thread, if you kill yourself we lose a valued member of the board
    thanks for the concern, got a few shocks already after I forgot to shutoff the main switch and was experimenting with the different wires

    anyway, it's nice to learn something new, don't want to have a Thai guy spoil the day for me

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    I knew it, a great thread

  15. #15
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    ok this is what I have for the first double switch on the right:



    and this is the second switch, also on the right:


  16. #16
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    so the question is where I should put the dimmer ?

    Option 1: First Double Switch
    I assume I don't touch the reds (too late I cut them but that can be fixed)
    but how should I connect the Dimmer ? to the Blue Wire ? or even the Green Wire ? The green wire is also connected to the "normal" switch as a LIVE relay

    Option 2: Second Double Switch
    Same I assume I don't touch the reds, and I connect the dimmer in serial to the Blue Wire ?

  17. #17
    lom
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    So there are only 3 wires, the 4th hole is prolly unused.
    Your 2 red wires goes between the switches, see Takeovers drawing.

    Just take out the blue wire and connect it to the dimmer switch and the 2nd terminal of the dimmer switch to where the blue wire was connected initially.

  18. #18
    lom
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    Quote Originally Posted by Butterfly
    Option 2: Second Double Switch Same I assume I don't touch the reds, and I connect the dimmer in serial to the Blue Wire ?
    Yes, correct, best place.

  19. #19
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    why do you want to dim the lights BF?

    just occasionally, or all the time?

  20. #20
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    did you know that your lights will probably dim by themselves if you touch the wrong wires?

  21. #21
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    I think I got the solution:

    It's between the Blue and even the Green, since the Green is also a LIVE

  22. #22
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    I am not familiar with this color coding. Maybe somebody else is.

    But I would be very hesitant to rely on color coding only. Do you have any means of checking a hot circuit, aside from your wet finger, which I strongly recommend not to use? There are Voltmeters and those little scredrivers with a little glow lamp to indicate power.

    For the expressions I used:

    Neutral should be at or near Ground Potential

    + should be 220V.

  23. #23
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    dammit BF, just get some advice from someone standing next to you

  24. #24
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    Quote Originally Posted by lom View Post
    Quote Originally Posted by Butterfly
    Option 2: Second Double Switch Same I assume I don't touch the reds, and I connect the dimmer in serial to the Blue Wire ?
    Yes, correct, best place.
    Actually Option 2 is the second switch on the last floor, not conveniently located

    Option 1 is where I want the switch because better location,

    it seems that Green + Blue are basically the LIVE line (green is a short serial relay between the 2 switches, 1 normal, 1 dual)

    but wait, it can't be the green as it's sourcing the other switch and I need to catch the LIVE before it goes to the first Dual

    damn, this is getting confusing, ok will need to give a try tonight

  25. #25
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    Quote Originally Posted by Takeovers
    I am not familiar with this color coding. Maybe somebody else is.
    there is no color coding, that's the problem, they use whatever wire they have in front of them.

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