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Electrics installation for small annexe

Discussion in 'Electrics UK' started by akist, 18 Feb 2019.

  1. akist

    akist

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    One electrician contractor has suggested that we run almost all electrical wiring under the foor screed/slab. Of course there will be wires in the loft for ceiling lights, and wires up the walls for light switches and sockets etc. The electrician has suggested that with the ceiling spot lights the loft space will become chock full of wiring otherwise.

    In my current bungalow all wiring is coming down from the loft, there is nothing in the floor.

    What should I do?
     
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  3. winston1

    winston1

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    I would run it from the loft so you can get at it for future modifications
     
  4. oldbutnotdead

    oldbutnotdead

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    There's no harm in running cable under the floor slab as long as they're ducted appropriately (not all rammed into a bit of 32mm waste pipe). Is there any great cost saving in doing the job that way?
     
  5. akist

    akist

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    Only a proposal from an contractor to avoid too many wires in the loft.
     
  6. JohnW2

    JohnW2

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    What's his problem with "too many wires in the loft"? He ought to see my lofts!

    Kind Regards, John
     
  7. oldbutnotdead

    oldbutnotdead

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    Define 'too many'? Bonus of no/few cables in the loft- insulation is v easy as is boarding out if you want to use it for storage. Downside- cables under the slab = pain if you decide to change your lighting layout in 5 years time (or want to add power/light in the loft). Up to him (he's designing the scheme) and you (you're paying for it so you can reject his proposal if you like)
     
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  9. akist

    akist

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    As I know it they run wires from the loft down the walls, inside a steel tube, and directly over a power switch or a wall socket so you know never to drill above a socket or switch. They never run wires horizontally even if it is to cover a small distance. Am I right?
     
  10. rsgaz

    rsgaz

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    It doesn't have to be. Can be steel capping, or PVC capping, or PVC oval tube, or nothing at all and just plastered over.

    They are allowed to run horizontally...

     
  11. akist

    akist

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    Thanks for the video and the advice.
     
  12. JohnD

    JohnD

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    abandon spotlights.
     
  13. akist

    akist

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    Hmm, you may have a point. With spot lights you have to be very precise as to the location in the ceiling if you intend to place tall wardrobes or cabinets...
     
  14. DIYnot Local

    DIYnot Local

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