How to use a fish tape in a conduit
Updated: 23 October 2026
The cable is in your hand and it will not enter the conduit, even though the draw wire or the reel is already in the house. This is the sequence for how to use a fish tape: prove the route, push until the head shows, tape a slim joint, pull in short tugs, and stop when it jams. The tapes named below are in the [cable pulling aid comparison](/hub/diy-supplies/cable-pulling-aid). The steps follow UK forum practice, a duct-rod manual, and the seller lines in this set. We did not film a pull. A qualifying purchase can earn a commission at no extra cost to you.
The cable is in your hand and it will not enter the conduit, even though the draw wire or the reel is already in the house.
The cable is in your hand and it will not enter the conduit, even though the draw wire or the reel is already in the house. This is the sequence for how to use a fish tape: prove the route, push until the head shows, tape a slim joint, pull in short tugs, and stop when it jams. The tapes named below are in the cable pulling aid comparison. The steps follow UK forum practice, a duct-rod manual, and the seller lines in this set. We did not film a pull. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Type | Length | Head | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  OBLUESKY OBLUESKY 6 m polyester fish tape | Draw wire | 6 m | Flexible guide | 8.5 | about £12.99 | View offer |
| Best value |  Afeld Elektro Afeld Elektro 10 m nylon pull wire | Draw wire | 10 m | Finder head and eyelet | 8.2 | about £4.88 | View offer |
| Alternative |  IRSCorp IRSCorp cable pulling sock set | Pulling sock | n/a | Eye loop | 7.7 | about £9.99 | View offer |
On this page
Before you push
Prove the circuit dead before a metal tape, a coated-steel line, or a lubricant goes near existing cable. Klein's UK catalogue says not to use a fish tape on or near live circuits. None of these listings states a voltage the way Ideal's Volt-Guard states up to 1,000 V.
Confirm the route is conduit, not a ceiling void. If the holes are downlighters, read fish tape versus cable rods before you push. Eye protection matters because a stiff line springs back. If this is a new circuit, a consumer unit, or a bath or shower room in England or Wales, Part P is the reason to use a registered electrician. Scotland and Northern Ireland do not use that Approved Document.
Push the tape and make the joint
Feed the spring, the eye, or the rounded head in first. On a polyester line, change the angle when it resists. If the head stops against a coupler, pull back, rotate, and try again. Forcing the jam is how tips snap off. A UK review of the QWORK 50 m reel says the end broke off and was left in the pipe.
Tape the cable back on itself so the nose is a taper. On 20 mm conduit, tape single conductors every few inches, and tape over any cable tie. A pulling sock goes on only after a light cord is through. If the head never appears, you are not in an empty tube.
Pull, and stop
Pull in short tugs. A yank pulls the draw wire off the cables. If you are alone, pull a metre, then free the cable and pull again. Armoured cable, or fibre with a rated tension, is not that job.
Lubricant helps a long conduit only after you have proved the circuit dead. The Ritelite cobra manual says to draw back about a metre rather than stab, then try the other end. A long underground duct is no longer this coil method. The brake is on the duct rodder for underground cable page.
Stuck, snapped, or coiled
Draw the tape back before you push harder. A metre of retreat often clears a lip. Do not stab. A broken tip is scrap that can block the next attempt or nick a sheath. If you cannot retrieve it, stop.
A new tape that springs into tight loops has no tube to hold it. Piaeny reviews describe that on a downlighter ceiling, and OBLUESKY reviews describe it in a hollow wall. More force will not straighten the coil. That route wants sectional rods. Call an electrician if you cannot prove the circuit dead, or if the tape is lost in a duct you would have to open.
Common questions
Which end do I push, and where do I attach the cable?
Push the spring, eye, or rounded head in first. Attach the cable only when that head has come out of the far end. Tape the cable back on itself so the joint tapers, and tape over any cable tie so it does not catch a lip.
How slim does the taped head need to be?
Slimmer than the tightest bend, and slimmer than the space left by cable already in the duct. A knot or a bulky sock loop is enough to plug the run. The Afeld eyelet at 8 by 2.5 mm is a small start. Reviews still say that eye can pull off, so the tape is part of the joint.
What do I do when it stops?
Ease the angle, as the polyester sellers say, and draw back about a metre rather than stab. That is the cobra manual's rule. Try the other end. If the head is already out, pull in short tugs. A yank pulls the wire off the cable.
Can I pull alone?
Yes, on a short empty conduit, a dash-cam lead, or a camper run, if you pull a metre at a time. A second person feeding the cable is the better plan once there are several bends. You should not pull armoured cable or rated fibre alone on a cheap coil.
Where does lubricant help, and why not on a live circuit?
Lubricant helps a long or occupied conduit when the sheath is dragging. Use it only after you have proved the circuit dead. Klein's UK catalogue notes that wet pulling compound can conduct before it dries. A greased joint that is fatter than the bend will stick. Nylon and polyester bullets are not a voltage rating.
What if the tip snaps off inside?
Treat it as debris. A UK review of the QWORK 50 m reel says the end broke off after a jam and was left in the pipe. Draw back what you still hold. Do not stab the broken end further in. If you cannot recover it, stop.
Why does a new tape spring back into a coil?
It was stored in a coil, and an open void gives it nothing to lean on. Piaeny reviews describe that in a ceiling. OBLUESKY reviews describe it in a stud wall. The fix is a conduit that supports the tape, or sectional rods for the void. Pushing harder keeps the same curl.
Related pages
Sources
Public sources and the amazon.co.uk listings compared on this page. Retrieved 22.10.2026.
- IET Part P FAQ, England and Wales (retrieved 22.10.2026)
- GOV.UK, third-party certification for domestic electrical work (retrieved 22.10.2026)
- IET Wiring Matters, buried conduits and ducts (retrieved 22.10.2026)
- HSE, underground services and cables (retrieved 22.10.2026)
- Ritelite Cobra rodding manual (retrieved 22.10.2026)
- Electrical Contractor Magazine, fish tape materials (retrieved 22.10.2026)
- Screwfix fish tape category (retrieved 22.10.2026)
- amazon.co.uk best sellers, cable insertion and extraction tools (retrieved 22.10.2026)