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Replacing switch with PIR based switch. Need bit help in confirming wiring

Discussion in 'Electrics UK' started by Samsg30, 7 Dec 2018.

  1. Samsg30

    Samsg30

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    Hi,

    I am looking to replace the normal light switch (on/off flick button) with this PIR switch (with On / Off / PIR / MIC sensor) as shown in picture E4 and need bit of help in confirming the wiring as this diagram has confused me.

    New PIR sensor has only two slots for wire labelled as 'AC' and 'LAMP' as shown in Pic E2 and 3 but the diagram shows L and N wires as shown in pic E1.

    Normal flick switch has only two wires too.. top part is permanent live and bottom part is live wire going to the lamp. Neutrals of both wires are connected together with other light switch wires.

    So, as per my understanding, I should connect the permanent live wire from top part of switch to 'AC' labelled connection and bottom live cable (going to the light) to the 'Lamp' labelled connection.

    Do you think this is as simple as that .. since the picture shows 'Neutral' with Load sign in it as shown in image E1.

    Thanks,
    Sam
     

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  3. winston1

    winston1

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    The picture shows a live and switched live connected to the switch. This is what you are concerned with.

    It also shows the switched live and neutral connected to the lamp. You are not changing this.
     
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  4. EFLImpudence

    EFLImpudence

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    Do you realise it will only work with incandescent (filament) lamps.
     
  5. Samsg30

    Samsg30

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    So no neutral wire needs to be attached to PIR sensor then?
    I have installed another PIR sensor in past which needed Live, N and switched Live to lamp but this one has only two so bit confused.
    Should I leave the supply neutral attached to load neutral as it is now and just swap the two wires from flick switch into this PIR switch?
     
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  7. Samsg30

    Samsg30

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    Yep.. that's what I have
     
  8. flameport

    flameport

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    but not for much longer.
     
  9. EFLImpudence

    EFLImpudence

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    Yes.
     
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  10. Samsg30

    Samsg30

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    will give it a go tomorrow.. thanks for your replies.
     
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