When performing various electrical work, it is often necessary to quickly and accurately remove the insulation on the cable or conductive conductors located inside it. Such an operation can be done with a simple knife, but it will take a lot of time and can lead to cuts and injuries to the hands. To avoid such painful and completely unnecessary cuts, experts advise using a special isolation puller – a stripper.

What is a stripper

Stripper (wire stripper – stripper, stripping) is a specialized Wire stripping machine for stripping wires. Due to its simplicity and relatively low cost, it is widely used not only by professional electricians, but also by ordinary homeowners engaged in self-assembly and repair of electrical wiring. A lot of beginner home masters, inexperienced electricians and electricians confuse a stripper with another tool that has a consonant name – a crimper. They differ in their functionality: a crimper, unlike stripping, is used only for crimping connectors at the ends of wires, connecting two wires using a special crimping adapter (tip). 

What is it used for?

Modern stripping models are used for the following purposes: Removing the external insulating layer of various cables (power, telecommunication); Removing the protective layer of the internal single- or multi-wire cable cores. Also in many semi-professional and professional pullers there are special devices for crimping (crimping) on ​​the exposed wires of special terminals, cutting the cable or its cores to the required length.

Operating principle 

Stripping the most simple stripper for wires with a cross section of 0.5 to 6 mm square. happens as follows: 

  • The arms of the tool are parted so that the round recesses on its lips are each divided into two parts. At the same time, the space between them should be such that a cable or conductor of the appropriate section can be inserted into it without effort; 
  • The end of the wire or cable is placed in a recess on one of the jaws corresponding to their cross section; When compressing the sponge with the help of handles, a circular trimming of the insulating layer occurs; 

The removal of the trimmed layer is carried out carefully, without jerking and sudden movements, by lifting the conductor stripping fixed between the jaws.

Types and characteristics of strippers

Depending on the design and the principle of removing insulation, there are simple manual, semi-automatic and automatic pullers. 

Manual wire stripper

This simplest type of stripping is a tick, in the lips of which there are recesses with pointed edges. The removal of the protective insulating layer occurs when it is circularly cut by the cutting edges of the recesses during compression by the handles. In order not to spread the jaws of the ticks, a return spring is installed between them. In order to prevent small children from injuring themselves by such a cleaning, it has a special handle lock. Such stripping is relatively small in size and weight. Its length is usually 180-190 mm, weight – no more than 200 g. 

Semi-automatic stripper

Semi-automatic stripping is a tool having the following design: 

Two handles with a spring located between them; 

A working head that can be moved apart into two parts and inside which there are two movable elements: 

a sharp knife consisting of two halves with recesses for specific diameters of the conductors and a clamp retainer for the conductor. 

The removal of the protective layer from the conductors using such stripping occurs as follows: 

  • The stripped end of the wire is inserted into the recess corresponding to its diameter; 
  • By pressing the handles, the insulating layer is trimmed in one half of the sliding working head and the wire is fixed in the other; 

Full pressing of the handles leads to the separation of the two parts of the working head and the removal of the trimmed section of insulation from the conductor. 

In some models of such stripping between the handles, there is often a device for cutting wires.

Which stripper is better to choose 

When choosing an insulation stripper, the following criteria are considered: 

Frequency of use of stripping – if the stripper will be used extremely rarely, then preference is given to manual and semi-automatic models. For large volumes of work use a professional automatic look of this tool. 

Cross-section of stripped conductive conductors – strippers are used for household wiring, capable of removing the protective layer from conductors with a cross section of 0.08 to 5-6 mm square. To perform electrical work on power transmission lines, the installation of electrical panels in production, tools are used that can strip conductive wires with a cross section of 5-6 to 8 mm square. 

Financial opportunities – when buying a budget tool for household needs, experts advise giving preference to inexpensive hand models, the cost of which does not exceed 1,100 rubles. If cleaning is necessary to perform various contractually paid jobs, then they acquire expensive and reliable automatic models worth 3000-5000 rubles. 

Also, when choosing this tool should consider its manufacturer. Preference should be given to reliable and well-established brands among professionals.