In the arsenal of a professional electrician, there is always a tool for stripping wires, which is necessary for stripping wires when connecting sockets, switches, cutting wires, etc. Such a device will also be useful to the home master, who has started repairs in an apartment or house.
We will figure out what tools exist to remove the sheath from the wires, what are the specifics of their application and indicate what you should pay attention to when buying such devices.
The need for special tools
To connect one socket or switch in the apartment, it is not necessary to buy professional equipment. To strip a piece of wire will turn out an ordinary kitchen knife. However, if there is a large-scale repair with a complete upgrade of the wiring system, then specialized devices cannot be dispensed with.
The number of contacts to be cleaned when repairing a house with an area of 100 square meters. m can reach thousands. To carry out such work without specialized devices is an unreasonable waste of time and energy.
In a modern room, installation of many sockets, switches, installation of shields, junction boxes and lighting fixtures is required
In addition, stripping without professional wire stripping tools is fraught with negative consequences:
- high risk of cable damage, which reduces the safety of electrical wiring;
- an incision in the conductive core leads to a decrease in the cross section of the wire, as a result of which there is an open or burning at the junction;
- if the cut is inaccurate, the damaged wire may break when bent.
In high-frequency systems with alternating current, the situation is complicated by the appearance of the skin effect - the current is distributed unevenly, and mainly in the surface layer of the conductor. In such wires, any most insignificant defect in the core can damage the equipment.
With a knife, you can carefully clean the insulation, but the work will take a lot of time. And if you need to prepare a lot of cables, then mistakes are inevitable - to quickly perform a large number of high-precision cuts will not work
When it comes to significant amounts of work, it is better not to take risks and use special devices. Damage to the conductor can cause a fire, damage equipment or cause electric shock.
Types of wiring accessories
The variety of tools can be classified according to the following criteria:
- a method of removing insulation;
- volumes of work performed;
- process automation.
The insulation shell can be removed in two ways: thermal and mechanical.
The first option is valid only for thin, low-power conductors used in communication devices, audio equipment and electronics operating at a voltage of about 5 volts.
Heat exposure is suitable for a one-time stripping of a small batch of conductors. To heat the insulation shell use: a lighter, a soldering iron, a heated thread of chromium
Professional methods are exclusively mechanical stripping. The work of tools is based on one of the principles of removing protective coating:
- Cutting. The tip cuts through the insulation layer in a circle, leaving current-carrying conductors without damage. After - part of the cut off coating is removed from the wire.
- The gap. The insulation is clamped and, after exerting force, it is literally torn off the conductor.
Based on the estimated volumes of work performed, all tools can be conditionally divided into two groups:
- household;
- professional.
Some include the electrician's knife to the first category. However, such a tool is always present in the arsenal of a professional. The knife is often used in everyday life due to its affordability and ease of use.
Professional devices: pliers, tongs, pullers and strippers. To perform a small amount of work, pliers and side cutters are suitable
The most popular among electricians are strippers. There are three types of professional tools for quick cable stripping: manual, semi-automatic and automatic.
In addition to the general classification, devices may differ in purpose. If universal tools or devices used exclusively for Internet wires or electric cables. The diameter of the stripped wire may also vary, the range of values is about 4-40 mm.
Nippers or pincers: nuances of application
A proven tool that acts on tearing. The principle of operation of the nippers is simple. Using the screw, the desired diameter of the wire is selected, then they wrap around the cable, scroll a little around and tighten the insulation coating.
When adjusting the pliers, select a capture width slightly larger than the cable section. This will protect the conductor from scratches while removing the protective layer.
Expensive forceps are made with insulated stainless steel handles. Some ticks without tearing clean the thinnest wiring.
Among the additional advantages of nippers include:
- reliability;
- durability;
- the ability to work in hard-to-reach areas;
- conducting stripping on live wires.
Cons of wire cutters: the inability to choose the length of removal of the insulating layer, the need to constantly reconfigure the screw when stripping wires of different diameters.
Electrician's knife - a traditional fixture
A knife with a curved blade simplifies work and speeds up the stripping process. There are several varieties of such a device.
Features of use of the device
The electrician's knife is more suitable for stripping flat cables. Experienced craftsmen will easily remove insulation from round wires, but there will be less usability.
The removal of the protective sheath with a knife must be carried out with gloves in order to avoid injury. This is especially true when stripping a cable manufactured in accordance with GOST. The insulation thickness of such a conductor is much larger than that of the wire according to TU, and it is more closely adjacent to the cores, which complicates the work.
When stripping, the tool must be held at an acute angle with respect to the cable. If this rule is neglected, then the risk of damage to the soft metal conductor is high
The braid is removed with light movements, cutting off the insulation from itself.
The main advantages of using knives:
- affordable cost;
- the presence of models with an insulated handle;
- practicality - the knife is suitable for wires of different diameters.
The main disadvantage is the duration of the work. Stripping cables of large cross section is quite laborious. In addition, with little experience there is a risk of damage to the cores.
Variety of electrician knives
There are three options for electric knives. They differ in the shape of the blade and the type of tip.
Knife with a heel. Fixture with a short, concave inward wedge. A “heel” is brazed perpendicular to the blade, which limits the depth of cut.
Such a knife is perfect for preparing wires with double insulation, when the upper protective layer must be removed and the lower one left intact
The plow tool is best used for wires with rigid conductors, the knife removes the soft girdle sheath worse.
Knife with a beak. Tool with a rounded blade. In such a knife, the bend is very smooth in contrast to the “heel”. The specific shape of the wedge complicates the work, the device is often used by experienced craftsmen.
The beak-shaped point is suitable for a circular cut of the shell. A longitudinal incision must be performed with extreme caution, as there is no limiter to the depth of cut
Knife with a hook. Such a tool is able to cross-section and longitudinally cut the cable. The wire is fixed on top with a bracket, and a sharp fang cuts through the insulation.
On the knife, you can set the depth of cut of the protective shell - for this an adjustment wheel is provided
This model is universal and suitable for processing most types of cables. The device is popular with professional electricians.
Assessment of the quality parameters of the tool
When choosing a knife for cleaning the insulating layer, it is necessary to be guided by a number of rules.
Primary requirements:
- It is better to use a knife with a small blade. The tool will be conveniently used in a limited space (cabinet, shield).
- The blade should be made of strong steel - such metal retains sharpness longer.
- It is better to choose a straight edge - this will simplify the cutting of wires with double insulation.
It is necessary to pay attention to the sharpening of the blade. It should not be too sharp, otherwise it is easy to get hurt when working.
In addition, a sharpened tip can accidentally spoil the conductors of the cable being processed or neighboring wires
Some tools have an insulating handle. The maximum voltage indicator that the knife is able to withstand is indicated on the device itself.
Stripper - usability
The best and most popular wire stripper to simplify your workflow. Tools are represented by a wide range.
The principle of operation of different models
The mechanism of action is based on processing the cable with two movable knives having a semicircular shape. The cut gauge is adjusted to the cross section of the wire, guaranteeing the accuracy of the notch and the absence of damage to the metal core.
Three types of strippers are distinguished depending on the automation of the process:
- mechanical;
- semi-automatic;
- auto.
Manual stripper. The insulation stripper has a simple design and is used to strip individual wires.
Outwardly, the mechanical stripper is similar to pliers. On the inner surface of the clamps there are several holes with blades designed to cut the sheaths of wires of different sizes
Working with a manual stripper is straightforward. The general scheme of stripping:
- Determine the diameter of the wire.
- Choose the appropriate hole on the lips of the device.
- Bite the cable by pressing the handles.
- Remove the braid from the wire by moving the stripper in a circle.
If you select a socket of a smaller diameter than the cross section of the wire, then there is a risk of damage to the core. When using a larger hole, the braid will not be removed.
Advantages of a manual stripper:
- compact size and light weight;
- the ability to compress the tip;
- the presence of several clearances for the wires - usually up to seven with a range of values of 0.25-2.5 mm.
Semi-automatic stripper. This option is more convenient for large volumes of work. The semi-automatic unit is equipped with a mechanism that does not require scrolling the stripper around the wire.
It is enough to choose a cell for the diameter of the wire, adjust the length of the insulation cleaning and bite the cable. The stripper will cut the sheath and pull it off without damaging the conductor
Auto. The tool simplifies the work as much as possible. The user does not need to select the diameter of the wire section. The device has one socket, the size of which automatically adapts to the wired cable.
Stripper is suitable for stripping wires with a cross section of 0.2-6 mm.
Some models are equipped with an adjusting screw for adjusting the grip size for smaller wire diameters
Most automatic strippers have advanced functionality. In addition to the direct task, they are able to perform:
- crimping tips;
- trimming the ends of the wire;
- twisting multicore cables.
An automatic stripper is able to strip single and double insulation wires. In one pass, the tool will remove only the upper shell. To remove the lower braid, the manipulations must be repeated.
Stripper Selection Options
Buying a tool is necessary based on the specifics of the activity. Before going to the store, you must compare the following criteria:
- scope of application - professional or domestic;
- scope of work - regular or periodic use;
- tool skills
- purchase budget.
For professional electricians, it is definitely better to choose semi-automatic or automatic devices designed to strip a large number of cables. The high price of devices is justified by the speed and convenience of work.
A special stripper is provided for cleaning the television, Internet cable. It differs from the usual one by the presence of additional knives for subsequent installation of the F-connector
The home master can "enrich" his arsenal of tools with a manual stripper. If there are no skills in working with electrical wiring, then it is better to choose a semiautomatic device - the risk of notching the wires is minimized.
Preference should be given to trusted manufacturers, guaranteeing the safety of materials and the durability of the tool. It is better to refuse cheap models from low-quality alloys and with a plastic case.
You can read more about how to choose a stripper in this material.
Alternative options: side cutters and pliers
Using some tools not for their intended purpose, it is quite possible to remove the insulation wrapper. Popular alternatives to professional tools: side cutters and pliers.
Side cutters. The device is designed for cutting wires of small diameter, as well as for trimming plastic and metal elements during installation and repair work.
When using side cutters to clean the insulation, it is necessary to control the clamping force so as not to damage the core.
Cutting edges should be directed in the opposite direction to the movement of the tool. The shell is carefully removed by a tube without injuring the conductor
For processing wires, pliers with precision holes of various diameters are suitable. Universal tool in demand for wiring.
Such pliers allow you to:
- grab and bend the wire;
- cut the wire of medium hardness;
- crimping contact sleeves;
- remove insulation.
The number of holes determines the functionality of the tool, usually the pliers are designed for processing wires of 3-6 sizes.
The permissible parameters of the wire cross section are indicated on the handle, the standard range of values is 0.5-3 sq. mm
Work with pliers carefully. If you do not calculate the force of the clamp, then you can easily damage the core.
The choice of stripping method for different wires
The complexity of stripping is largely determined by the type of wire. When choosing a tool, you should consider the features of the cable:
- Coaxial wire. When removing double insulation, work is carried out in two stages. The top layer can be removed thermally, and the bottom with a stripper. The cores of this cable are very fragile and thin, so they are easy to damage.
- PTFE cable. Heat-resistant insulation that can only be removed mechanically. An electrician's knife or a stripper will do.
- Enameled wire. If the cross section is less than 0.2 square meters. mm, then we must resort to the thermochemical method using a soldering iron and vinyl chloride tape. The wire is put on a tape, a cable is held with a soldering iron - the released chlorine contributes to the "departure" of the enamelled sheath from the wire.
When choosing a tool, it is necessary to consider what diameter of the wire the device is designed for, as well as the material for manufacturing the handle.
The cable knife in terms of dimension is universal. But pliers, pincers, manual and semi-automatic strippers are limited by the capture range
If it is necessary to process electric cables, strippers with a handle of dielectric material must be selected.
The coating protects against voltage within 1000 watts.
A variety of tools for stripping wires and cables, comparison strippers:
The choice of the tool should be based on the upcoming conditions for its use, the need for additional functionality. The main thing is that the device ensures compliance with two main requirements: stripping insulation without damage to conductive conductors and in accordance with the declared dielectric characteristics.
If there are doubts regarding the second, then all work is carried out exclusively with the voltage removed.
And what wire stripping tools do you use? Please share your own experience with visitors to our site. Leave your comments in the box below. There you can ask questions about the topic of the article.