What tools are needed to pull the wire into a sheath? | Mecaspin

Pulling wires/cables through an electrical conduit is no easy task, especially if you're alone on the site. That's why it's often necessary to use tools to make the task easier. We're going to show you the techniques and equipment that can be used to help you pull electrical cables.

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Wire puller included in the ICTA sheath

When ICTA sheaths are purchased, they are already pre-spinning with a small metal wire so that electrical wires and cables can be pulled through. Although practical, this small wire does have a tendency to break frequently. For small jobs, it will do the job, but it&#;s better to have an electrician&#;s needle, which is much sturdier, just in case.

Manual electrician&#;s needle

An electrician&#;s needle is ideal for pulling wires and cables into electrical sheaths on small and medium-sized sites. It is available in different materials, each with its own advantages:

• Nylon thread-pulling needle: this is the most common and least expensive model in the range. It&#;s hard-wearing and suitable for small jobs and occasional use.
• Polyester thread-pulling needles: flexible and rigid at the same time, polyester thread-pulling needles are ideal for medium-sized jobs. Its rigidity gives it a greater thrust force than nylon and its smoother material allows it to progress better in sheaths with less friction. This solid material reduces the risk of breakage in difficult ducts.
• Fibreglass thread-pulling needle: extremely flexible and rigid, but also fragile, suitable for very winding sheath runs. It&#;s perfect for large sites with frequent use and long lengths of wire to pull.
• Steel + nylon thread-pullingneedle: this is the most rigid needle for pulling and pushing threads in tight, winding places. Ultra-resistant over time, it&#;s the solution best suited to major works (industry, tertiary sector, commerce).

The electrician&#;s needle is made up of the wire, which can be of various diameters and lengths, as well as a guide head with various tips, pull rings and connecting sleeves.

The electrician&#;s needle is available in diameters ranging from 3 to 6 mm. Lengths range from 5 to 25 m for the cable alone, 20 to 30 m for a reel version and up to 300 m for a reel version. Prices range from &#;10 to &#;150, and up to &#;1,000 and more for professional versions.

Lubricant for pulling electrical cables

The lubricant is used to facilitate the passage of cables in an electrical sheath. Since the golden rule is never to force the cable, the lubricant is ideal to use whatever pulling method you choose. It eliminates up to 90% of friction when pulling the electrical wire through the sheath, and makes difficult passages easier (crushed sections, bends, etc). Mostly water-based, the lubricant is compatible with all insulating materials and plastics used in electrical sheaths, whether rigid, flexible or corrugated, and does not affect the electrical wires. Lubricants can cost between &#;5 and &#;20, depending on the brand and quantity.

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Thread-pulling rods

Wire-pulling rods are generally 1 m long and are sold in kits of 5, 10 or 15 pieces. The advantage of rods is that they can be screwed together to obtain the desired length.

desired. Very practical in confined spaces, they are suitable for routing cables in false ceilings, attics and technical ceilings. Like the pull-thread needle, they have guide heads and connectors to link them together.

Electric wire-pulling robot

A more recent solution on the market is the development of electric cable-pulling robots. It allows you to take advantage of electric winding and unwinding, which is much quicker and more comfortable than using a manual puller. Specifically designed for professional use, the wire-pulling robot makes it easy to pass cables through an electrical conduit in all circumstances, even with just one person on site.

Automatic prefilming machine

Automatic pre-wiring machines are designed for professional use, and are mainly aimed at electrical contractors, electricians and electrical wiring professionals. They are up to five times faster than hand spinning. Compatible with CAD software for electricians, they can produce wiring up to 30 m long at a speed of 3 m per second. Industrial pre-threaders are capable of sorting the different types of cable, wire and sheath inserted into the machine according to diameter, length and colour, to optimise wire and sheath changeover times. Thanks to pre-wiring machines, it is also possible to manage the labelling of electrical ducts. To find out more about automatic pre-wiring machines, please consult the MECASPIN pre-threading machine data sheets.

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