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Feeding draw rope into ducting

Discussion in 'Electrics UK' started by tybach, 3 Sep 2010.

  1. tybach

    tybach

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    I am having to lay 50 meters of 50mm ducting for our new electricity supply. The DNO (Western Power) have kindly given me 100 metres and have told me to cut to length and to thread a draw rope.

    I have never done anything like this and have 2 questions-
    1. what's the best/easiest way to thread the draw rope?
    2. can I use a 10 mm climbing rope (I have lots of this from work)

    Any advice on these points (or anything else to do with laying the ducting) would be well received!!!
     
  2. viewer

    viewer

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    Tie a rag to the rope making a ball of size just smaller than the duct. Push down duct as far as possible with a rod. Then put in the garden hose and use the water pressure to push the rope through.
     
  3. Chri5

    Chri5

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    Or if you hire a compressor for the ground break, do as above and blow through a light rope / string and then attach the draw rope to the string.

    The water trick is poor form, it allows water to sit inside the duct and only really works if from one end to the other there is a proper drop end to end.
     
  4. holmslaw

    holmslaw

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  5. Chri5

    Chri5

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  6. holmslaw

    holmslaw

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  7. ban-all-sheds

    ban-all-sheds

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    Use ducting which comes with a drawstring already threaded through it.

    I'm not taking the p*** - you may have been given ducting for free, but if it doesn't have a string in it then for the sake of £50-60 I'd go and buy some which does, rather than spend ages faffing around trying to get your own threaded through.
     
  8. Deluks

    Deluks

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    Something long heavy and point. a pointy SDS chisel for example, wrap bricklayers line around and tape up with gaffa tape pulled very tight. Lay duct out in a straight line, drop weight in one end and walk the length of the pipe keeping it raised by feeding it over your shoulder so the weight is constantly dropping forward in front of you.

    *edit* Mulling it over, this would probably work whilst still coiled up, chuck it in and roll it along. Although the weight needn't be so long as it might get stuck in the bend.
     
  9. Chri5

    Chri5

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    The air compressor method works, done it dozens of times and if the OP is digging 50m+ x 600mm surely a compressor will be on site ?

    Make up a ball of paper 35-40mm, wrap with gaffer tape, attached to string or filament line (which will need to be on a mini rod stand to free wheel). The compressor pushes the ball, the string follows due to free wheeling on the stand. Job done in 20 seconds !

    Anyone remember blown fibre :rolleyes:
     
  10. NamelessRob

    NamelessRob

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    Do you know anyone who keeps pet ferrets? (If Qi is to be believed, that's a fairly common solution in industry.)
     
  11. Chri5

    Chri5

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  12. holmslaw

    holmslaw

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  13. ban-all-sheds

    ban-all-sheds

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    Actually, that might be a BGI. As long as the ducting was reasonably flat and straight, and you used it to pull a very light thing through (fishing line?) I could see that working.
     
  14. NamelessRob

    NamelessRob

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    Tie a steel washer onto a fishing line & drag a magnet down the outside of the duct?
     
  15. ColJack

    ColJack

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    methinks I see a gadget idea for dragons den... :)
    something with 3 or 4 spring loaded tracks and either a long cord for power or battery powered..
     
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