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Smoke alarms (nym-j)

  • 27-04-2016 10:10pm
    #1
    Robbie1985
    Registered Users, Registered Users 2 Posts: 6 ✭


    Do smoke alarms have to be wired in nym-j in domestic use...cant see the difference between using that an t&e?? Sparks mentioned it when i asked him??


Comments

  • #2
    DublinDilbert
    Registered Users, Registered Users 2 Posts: 5,401 ✭✭✭DublinDilbert


    Robbie1985 wrote: »
    Do smoke alarms have to be wired in nym-j in domestic use...cant see the difference between using that an t&e?? Sparks mentioned it when i asked him??

    Did he suggest 4 core nymj? So you've a proper Earth at each alarm? And one wire for the data link?

    It's not recommended to use the earth in the t&e as the data link. Would it work yes, but not the best practice


  • #3
    Robbie1985
    Registered Users, Registered Users 2 Posts: 6 ✭Robbie1985


    No he has used 5 core..said he cant use 4 core..no earth in 4 core nym, only phase colours as he said..against rules..jus seemed a waste of cable to me,t&e + single cable for link??


  • #4
    Robbie1985
    Registered Users, Registered Users 2 Posts: 6 ✭Robbie1985


    Sorry think he said blue not earth??


  • #5
    DublinDilbert
    Registered Users, Registered Users 2 Posts: 5,401 ✭✭✭DublinDilbert


    Robbie1985 wrote: »
    No he has used 5 core..said he cant use 4 core..no earth in 4 core nym, only phase colours as he said..against rules..jus seemed a waste of cable to me,t&e + single cable for link??

    Yea it is a lot of cable alright. You can just run a single 1.5mm lighting cable as the link wire too and just use 1.5 T&E for the power.


  • #6
    salmocab
    Registered Users, Registered Users 2 Posts: 11,467 ✭✭✭✭salmocab


    DublinDilbert wrote: »
    Yea it is a lot of cable alright. You can just run a single 1.5mm lighting cable as the link wire too and just use 1.5 T&E for the power.

    Thats what I do 1.5 t&e and a single 1.5 pvc/pvc. Using nymj seems like a waste of money and probably effort as its probably harder to work a pair of nym's hanging out of a ceiling


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  • #7
    Robbie.G
    Registered Users, Registered Users 2 Posts: 1,884 ✭✭✭Robbie.G


    salmocab wrote: »
    Thats what I do 1.5 t&e and a single 1.5 pvc/pvc. Using nymj seems like a waste of money and probably effort as its probably harder to work a pair of nym's hanging out of a ceiling

    The amount of lads using 4 core flex is amazing
    Personally I use 1.5 t&e & a pvc pvc brown for link


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