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Making a hole bigger that has a cable in it?

Discussion in 'General DIY' started by Munzz, 14 Aug 2020.

  1. Munzz

    Munzz

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    I have this task today, replacing a CCTV camera on the exterior of a house (brick) but need to expand the current 15mm hole to 25mm.

    The problem is, the CAT5 cable comes out of this hole and access inside is now not possible (wooden flooring).

    Options I’ve thought of:

    1. Tape 1mm draw wire to cable, push into cavity leaving the draw wire on my side and carefully drill.

    2. Same above but use string and vacuum back through.

    Am I missing a more sensible, less risky option?
     
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  3. HERTS P&D

    HERTS P&D

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    Why don't you drill another hole?

    Andy
     
  4. Munzz

    Munzz

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    Want to avoid that ideally, would still be a struggle fishing the cable from the existing to new one though?
     
  5. bernardgreen

    bernardgreen

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    or use a hook on the end of another length of string to fish for the string on the CAT.

    Tie the string into several loops to ensure the hook catches the string.

    If the ceiling that the CAT cable will fall unto is some distance below the hole then tie a metal ( magnetic ) object to the end of the CAT cable and fish for it using a magnet.

    =====CAT cable======knot----flexible string----- Metal
     
  6. johnny2007

    johnny2007

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    Feed the cable through a piece of 15mm copper pipe so to shield it while you enlarge the hole either with a hole cutter without pilot (needs skills) or several small holes to form a larger circle.
     
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  8. phone open reach before you start because you’re going to wreck it
     
  9. Munzz

    Munzz

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    What have they got to do with a CCTV camera?
     
  10. soz thought it was phone/ internet.
    ‘cctv’ was the clue , my mistake
     
  11. Munzz

    Munzz

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    No probs.

    For anyone interested, the 1mm cable trick didn’t work as it kept getting caught in the drill bit. I ended up drilling 4 smaller holes around the existing hole and chiselled out a nice round larger hole.
     
  12. DIYnot Local

    DIYnot Local

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