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Buried cables regulations

  • 01-08-2020 07:16PM
    #1
    fritzelly
    Registered Users, Registered Users 2 Posts: 18,028
    ✭✭✭✭


    Whats the regs on buried electrical cable?

    I've chased about 5 cm deep - and knackered so don't wanna have to go deeper if I don't have to

    Found some British regs but are they the same as Ireland

    Basically is it deep enough or will I need a conduit and should it be plastic or metal?


Comments

  • #2
    Leftyflip
    Registered Users, Registered Users 2 Posts: 7,463 Leftyflip
    ✭✭✭


    Chased into a wall? Or dug into the ground?


  • #3
    Frankx
    Closed Accounts Posts: 119 Frankx
    ✭✭


    There's a few

    Generally cables go horizontally or vertically to a switch etc

    And they should be at least 50mm back from the other side of a wall

    There's a few more but mostly you will stick to the standard runs above


  • #4
    Frankx
    Closed Accounts Posts: 119 Frankx
    ✭✭


    If youre dropping to a socket etc you only need plastic

    You actually don't want to go in to deep if it's a thin wall as you might be out too far towards the other side


  • #5
    listermint
    Registered Users, Registered Users 2 Posts: 34,214 listermint
    ✭✭✭✭


    fritzelly wrote: »
    Whats the regs on buried electrical cable?

    I've chased about 5 cm deep - and knackered so don't wanna have to go deeper if I don't have to

    Found some British regs but are they the same as Ireland

    Basically is it deep enough or will I need a conduit and should it be plastic or metal?

    It should be in conduit and min 750mm.


    What are you installing?


  • #6
    Frankx
    Closed Accounts Posts: 119 Frankx
    ✭✭


    450mm for SWA buried in a domestic garden or driveway


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  • #7
    Lumen
    Registered Users, Registered Users 2 Posts: 31,253 Lumen
    ✭✭✭✭


    listermint wrote: »
    It should be in conduit and min 750mm.
    I assume since he got knackered by going 5cm deep it's not in his garden. :D


  • #8
    Lumen
    Registered Users, Registered Users 2 Posts: 31,253 Lumen
    ✭✭✭✭


    Frankx wrote: »
    450mm for SWA buried in a domestic garden or driveway

    I believe ET101 states, from bottom to top:

    - 100mm sifted soil or sand
    - SWA
    - 150mm sifted soil or sand
    and then 450mm comprising:
    - Cable tile
    - Warning tape
    - Backfill

    So effectively you have to start by digging a trench of depth 700mm+cable diameter.

    But this isn't what the OP was about. :D


  • #9
    Frankx
    Closed Accounts Posts: 119 Frankx
    ✭✭


    Lumen wrote: »
    I believe ET101 states, from bottom to top:

    - 100mm sifted soil or sand
    - SWA
    - 150mm sifted soil or sand
    and then 450mm comprising:
    - Cable tile
    - Warning tape
    - Backfill

    So effectively you have to start by digging a trench of depth 700mm+cable diameter.

    But this isn't what the OP was about. :D

    I'd say he's on about a wall chase


  • #10
    fritzelly
    Registered Users, Registered Users 2 Posts: 18,028 fritzelly
    ✭✭✭✭


    Sorry, its in a wall for a light switch


  • #11
    listermint
    Registered Users, Registered Users 2 Posts: 34,214 listermint
    ✭✭✭✭


    If your 5cm deep your half though the block. Too deep :)


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  • #12
    fritzelly
    Registered Users, Registered Users 2 Posts: 18,028 fritzelly
    ✭✭✭✭


    Block is about 120mm, I'm probably more 40 mm than 50


  • #13
    chooseusername
    Registered Users, Registered Users 2 Posts: 4,236 chooseusername
    ✭✭✭


    fritzelly wrote: »
    Block is about 120mm, I'm probably more 40 mm than 50
    I think it's something like 1/3 of block thickness for vertical chase,
    so about 35mm.
    and half that for horizontal chase.


  • #14
    Calahonda52
    Registered Users, Registered Users 2 Posts: 13,197 Calahonda52
    ✭✭✭✭


    522.6.4 :4th edition 2008 the distance measured horizontally between the wring and the reverse side of the wall is not less than 50 mm

    +all the stuff about horz and vertical distances

    “I can’t pay my staff or mortgage with instagram likes”.



  • #15
    tech
    Registered Users, Registered Users 2 Posts: 2,869 tech
    ✭✭✭


    500mm would be best


    cover with some gravel and then some yellow warning tape incase someone comes digging in years to come


  • #16
    Lumen
    Registered Users, Registered Users 2 Posts: 31,253 Lumen
    ✭✭✭✭


    This thread is like a reading comprehension test.


  • #17
    fritzelly
    Registered Users, Registered Users 2 Posts: 18,028 fritzelly
    ✭✭✭✭


    All done and I didn't kill myself
    Looking pretty good with new wallpaper and new switches


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