Need a wee bit advice re light switch

Discussion in 'General Electronics Chat' started by bonnieboat, Nov 28, 2011.

  1. bonnieboat

    Thread Starter New Member

    Nov 28, 2011
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    Hello

    I bought one of those PIR sensor auto light switches for our common hallway. It is CE marked ok and from a reputable seller but am a bit confused by its connection markings?

    There are 3 connections on the switch L N and L'

    I am in the UK and used to seeing L N and E

    Ok so

    N = Blue
    L = Brown

    so is the L' my green and yellow protected earth ?


    Thanks and sorry to trouble with what is probably a daft quesiton....

    BB
     
  2. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    I think the L' is the switched Line to the light.
    If the circuit has no exposed metal parts then it doesn't need a "protected earth" wire.
    The Neutral connects to the PIR and to the light.
     
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  3. sheldons

    Active Member

    Oct 26, 2011
    616
    101
    audioguru is quite right.....the l1 connection will be for fitting a switch so if you want you can switch the light on regardless of the pir sensor...HERES HOW TO WIRE IT.....
     
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  4. bonnieboat

    Thread Starter New Member

    Nov 28, 2011
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    Thanks guys

    Of course I went to the switch and:

    There are 5 wires, all of which are "Red" in colour
    2 go together into "COM" and the other 3 go together into "NO"
    (image attached)

    My new switch has L N and L'

    Sorry gents and thanks again for any help

    BB
     
  5. sheldons

    Active Member

    Oct 26, 2011
    616
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    Are you fitting it to control the hallway light?if so you need to take a feed from the fitting to the pir and identify the switch wiring as a start ....has yr pir provision for an override switch or is the L1 on your pir the switched light feed??give me a link to your passive(was it off ebay??) wiring for lighting does still need to be earthed at the fitting(s) and the switch(es).......
     
  6. bonnieboat

    Thread Starter New Member

    Nov 28, 2011
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    Thanks Sheldons

    I have scanned the wiring diagram that came with the switch and here is the link to e-bay:

    http://www.ebay.co.uk/itm/PIR-MOTIO...850?pt=UK_Garden_Lighting&hash=item5ade5c22f2

    There are no exposed metal components in the current switch in play and no protected earth connecting to the actual switch. It only has Red wires going to two connections "COM" and "NO" 2 red into "COM" and 3 more red into "NO"

    The common hallway also has a back up emergency lighting thing if that maybe is a factor for the number of wires?

    The diagram for the new switch would appear to utilise all 3 ports L N and L'

    Thanks again
     
  7. sheldons

    Active Member

    Oct 26, 2011
    616
    101
    another thing are the hallway lights wired as a two way lighting circuit?can you switch them on and off at two different locations??There is no provision at the switch to connect this unit as you only have a live feed and the rest are switch wires ,you need a seperate neutral at the switch....which is why i mentioned the feed coming from the fitting itself...is this hallway in a block of flats??if so its not really the correct item to use there are better ones available...
     
  8. bonnieboat

    Thread Starter New Member

    Nov 28, 2011
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    0
    Thanks Sheldons

    Yes it is a common stairway and there are 3 of these switches in the stairs. Ok If I understand right, this switch is not going to be suitable as what you are saying is that there is no neutral wire at the existing switch / wall. There is only live and switch wires.

    I do need something and came accross the one (attached) The wiring diargram also talks about a neutral wire...I think. Failing this one being of any use, any suggestions?

    The push plunger one we have keeps failing / sticking.


    Thanks again Sheldons
    BB
     
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