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Cable for pir

  • 02-12-2022 4:43pm
    #1
    funkey_monkey
    Registered Users, Registered Users 2 Posts: 8,593 ✭✭✭


    Hi.

    What cable do you use to wire a pir which has neutral, live and switched live connections?

    I presume that I can't use earth wire with a brown sleeve on it. So what is the correct cabling to use?



Comments

  • #2
    funkey_monkey
    Registered Users, Registered Users 2 Posts: 8,593 ✭✭✭funkey_monkey


    Also, if I use 4 core wire, how should the earth be terminated if there is no connection for it and is it therefore not needed and be ignored?



  • #3
    alan4cult
    Registered Users, Registered Users 2 Posts: 1,583 ✭✭✭alan4cult


    You don't need 4 wires.

    Incoming Neutral, Live, Earth

    Outgoing Neutral, SL, Earth

    The earth just passes through, you don't need to strip it.



  • #4
    10-10-20
    Registered Users, Registered Users 2 Posts: 8,073 ✭✭✭10-10-20


    I think that the question is more around how to wire these when the screw-contacts aren't wide enough for two T&E copper wires in the neutral or the device just isn't going to take two oval cables and remain water-resistant.

    https://www.boards.ie/discussion/2058274311/cable-for-pir

    Maybe this would be acceptable it if you wire back to a junction box.

    https://www.eurosales.ie/products/4CFLXCBL.html?filter_set%5B%5D=4776,4777,4778




  • #5
    kirk.
    Registered Users, Registered Users 2 Posts: 4,957 ✭✭✭kirk.


    I always used 5core when doing that

    It has the blue core, that 4core only has the 3 phase and earth colours



  • #6
    funkey_monkey
    Registered Users, Registered Users 2 Posts: 8,593 ✭✭✭funkey_monkey


    @10-10-20 - that's the cable I was planning on using - with a bit of brown sleeving on the grey wire to use it for the switched live.

    How would you terminate the earth in the PIR - or would you snip it? I had thought of either putting a terminal on it or not stripping it and putting tape over the end, but if it isn't to be used why go to the bother?

    What colour should be used for switched live?



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  • #7
    funkey_monkey
    Registered Users, Registered Users 2 Posts: 8,593 ✭✭✭funkey_monkey


    https://www.boards.ie/discussion/comment/119951772#Comment_119951772

    The earth just passes through, you don't need to strip it.

    Okay, so you bring it through on the presumption that there will be an onward connection at some stage?



  • #8
    funkey_monkey
    Registered Users, Registered Users 2 Posts: 8,593 ✭✭✭funkey_monkey


    https://www.boards.ie/discussion/comment/119955327#Comment_119955327

    Do you use the black then as switched live?



  • #9
    funkey_monkey
    Registered Users, Registered Users 2 Posts: 8,593 ✭✭✭funkey_monkey


    Am I correct in thinking that as long as earth is only used for earth then I can sleeve the grey wire and use it as switched live? Terminate the earth in a block or Wago and it should be a suitable install?



  • #10
    kirk.
    Registered Users, Registered Users 2 Posts: 4,957 ✭✭✭kirk.


    https://www.boards.ie/discussion/comment/119956741#Comment_119956741

    A 5 core wired back to junction box and you'll have all your colours without sleeving or else 3-core wired in and out direct to light fitting with no jointing

    Black and grey are phase colours and don't need sleeving

    Earth should be connected at sensor if there is a terminal



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