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    Buried cables regulations

    • 01-08-2020 07:16PM
      #1
      fritzelly
      Registered Users, Registered Users 2 Posts: 18,027
      ✭✭✭✭


      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?


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    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: 34,212 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: 31,248 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: 31,248 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: 18,027 fritzelly
      ✭✭✭✭


      Sorry, its in a wall for a light switch


    • #11
      listermint
      Registered Users, Registered Users 2 Posts: 34,212 listermint
      ✭✭✭✭


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


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    • #12
      fritzelly
      Registered Users, Registered Users 2 Posts: 18,027 fritzelly
      ✭✭✭✭


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


    • #13
      chooseusername
      Registered Users, Registered Users 2 Posts: 4,234 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: 13,183 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: 31,248 Lumen
      ✭✭✭✭


      This thread is like a reading comprehension test.


    • #17
      fritzelly
      Registered Users, Registered Users 2 Posts: 18,027 fritzelly
      ✭✭✭✭


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


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