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Burying twin & earth

  • 21-01-2008 12:04am
    #1
    Cmar-Ireland
    Registered Users, Registered Users 2 Posts: 2,340 ✭✭✭


    Is it ok to bury twin & earth in concrete or should a conduit be used?

    Thanks


Comments

  • #2
    bushy...
    Closed Accounts Posts: 1,467 ✭✭✭bushy...


    The concrete will attack the insulation , so you need conduit . Better if it ever breaks too since you can just pull a new length through. Use armoured outdoor cable too.


  • #3
    Stoner
    Registered Users, Registered Users 2 Posts: 10,952 ✭✭✭✭Stoner


    you can't do this under any circumstances, PVC PVC cable can't be installed if it will be under water , if you want to go underground you need SWA cable


  • #4
    Cmar-Ireland
    Registered Users, Registered Users 2 Posts: 2,340 ✭✭✭Cmar-Ireland


    What I am doing is chasing out channels in the floor to relocate some sockets and moving the TV point to a different area in the room. So if I chase out a 40x30mm channel and bury some square or round conduit and backfill the channel with some mortar, I can feed the twin & earth through? I wouldn't need armoured cable for this application would I?


  • #5
    Stoner
    Registered Users, Registered Users 2 Posts: 10,952 ✭✭✭✭Stoner


    Cmar-Ireland,

    no you wont, conduit will be fine once its inside your house


  • #6
    Cmar-Ireland
    Registered Users, Registered Users 2 Posts: 2,340 ✭✭✭Cmar-Ireland


    Stoner wrote: »
    Cmar-Ireland,

    no you wont, conduit will be fine once its inside your house

    Great, Thanks for the info!


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  • #7
    maurice1
    Registered Users Posts: 178 ✭✭maurice1


    You can get 20mm flexible conduit which makes the job a lot handier, getting up behind the skirting


  • #8
    eoghan.geraghty
    Registered Users Posts: 419 ✭✭eoghan.geraghty


    Cmar,
    I would use nymj for this rather than t&e.


  • #9
    Cmar-Ireland
    Registered Users, Registered Users 2 Posts: 2,340 ✭✭✭Cmar-Ireland


    Whats nymj?


  • #10
    maurice1
    Registered Users Posts: 178 ✭✭maurice1


    It is a circular cable made with 3 x 2.5mm conductors with all the conductors insulated.
    Often seen used for outside lights.
    Flies through round conduit

    It looks like white flex except it feels harder and it has a soft rubber between the insulated conductors and its mechanical protection.
    Available in meter lengths from any Elec wholesaler, about 60cent/meter


  • #11
    Cmar-Ireland
    Registered Users, Registered Users 2 Posts: 2,340 ✭✭✭Cmar-Ireland


    maurice1 wrote: »
    It is a circular cable made with 3 x 2.5mm conductors with all the conductors insulated.
    Often seen used for outside lights.
    Flies through round conduit

    It looks like white flex except it feels harder and it has a soft rubber between the insulated conductors and its mechanical protection.
    Available in meter lengths from any Elec wholesaler, about 60cent/meter


    Sounds like the job, I'll go with that. Only need about 10m to do the runs I want.
    Any particular conduit I should use?


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  • #12
    Cmar-Ireland
    Registered Users, Registered Users 2 Posts: 2,340 ✭✭✭Cmar-Ireland


    maurice1 wrote: »
    You can get 20mm flexible conduit which makes the job a lot handier, getting up behind the skirting

    Where can I pick up this flexible conduit? Sounds perfect for the job.


  • #13
    Stoner
    Registered Users, Registered Users 2 Posts: 10,952 ✭✭✭✭Stoner


    most decent suppliers
    http://www.boards.ie/vbulletin/showthread.php?t=2055193263

    the proper copex flexi conduit has steel in it but very expensive, but there are cheaper plastic ones , there is a grey coloured one that is tough and cheaper (dont know the name), but there is a black one called guvi flex, it is too light to use in the floor IMO.


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