How to remove insulation from wire and power cable?
Which tool to use?
The easiest way is to remove the insulation from the wire with a conventional knife. In this case, the upper protective layer is removed by longitudinal cuts, and the shell of the contacts is cut in a circle, slightly piercing the blade inward. In this case, you will not spend much time on such an activity, but there is a risk of damaging the conductor, especially if the turns are thin.
If you decide to use a knife, then it is advisable to use a special one whose blade is slightly curved for the convenience of stripping. Pay attention to the handle, it must be made of a material that does not conduct current.
Experienced electricians are advised to remove the insulation of the wire with a knife according to the following technology:
- Put the conductor on the table.
- Press with the index finger of your left hand (if you are right-handed).
- With your other hand, take a tool to remove insulation (in this case, a knife) and slightly push it into the protective sheath.
- With the index finger of your left hand, slowly scroll the material one full revolution (very convenient if you decide to remove the sheath from the round power cable).
- Pull off a cut piece of insulating material (maybe PVC, rubber, silicone and even a paper shell).
That is the whole essence of the work. As you can see, there is nothing complicated, but there is a high probability of damage to the contact, which makes this method not very effective.
About, how to make an electrician's knife with your own hands We talked in a separate article. Step-by-step instructions with photo examples explain the whole essence of the work!
The second way to remove insulation from the wire and power cable is to use a soldering iron. In this case, the tip is heated to the required temperature, after which you, by analogy with the previous option, remove the shell (scroll the conductor with your finger, leaning the soldering iron against the insulation). As a result, the extra piece of the shell is easily separated from the rest. The disadvantage of this method is that when the material comes in contact with a heated sting, an unpleasant odor will go around the room. In addition, a soldering iron is not recommended if the shell is rubber.
By the way, another tool can be used in the same way - the so-called “roasting”. When using it, you will hear the same unpleasant odor, so you need to use it only in extreme cases.
There are also universal tools for stripping wires and cables, called manual strippers. Such products are more functional, because allow manual adjustment of the diameter of the cores, so that when cutting does not damage them. Using strippers is quite simple - fix the desired contact and scroll along the guide arrow one revolution (as shown in the photo).
There are also special strippers on the market in order to remove the insulation from cross-linked polyethylene without burning it. Such tools have a high price (over 6000) and are used for industrial purposes, so we will not dwell on their review in detail.
Video review of a professional puller:
Well, the last, best-rated electrician method is to use a tool called a stripper. This device is designed specifically for automatic stripping of wires. The design provides not only a section regulator, but also special nippers, as well as a crimper (used for crimping tips). Using a stripper is not difficult: the cable is fixed in the clamping jaws, the handle is compressed and expanded. The result is a quickly exposed vein without damage. It can be used to remove insulating material from the most popular types of conductors: VVG, PVA, NYM and many others.
In fact, if you have already decided to engage in electrical work, then be sure to buy a stripper. The cost of the model for amateurs does not exceed 1000 (usually 300-500).
At the same time, the advantages of the tool are as follows:
- used as for very thin section, from 0.05 mm2, and with a thick - 6 mm2;
- It can be additionally used as nippers and a press;
- used with any type of insulating material: silicone, polyvinyl chloride, rubber, fluoroplastic shell:
- can easily remove the sheath even from loops, twisted pairs and stranded wires;
- does not damage the live part of both aluminum and copper wires;
- easy to use;
As you can see, this device has a lot of advantages and absolutely no drawbacks, compared to alternative options. That is why we recommend that you choose a stripper to strip the wires and cut the cable. This tool has many positive reviews on thematic forums from experts in the field of electronics.
In the field, many electricians use their own teeth in order to remove the protective shell. We draw your attention to the fact that this method is quite dangerous for tooth enamel, so using it is highly not recommended! If possible, take a pair of pliers or side cutters, they should always be at hand with an electrician!
We also recommend that you watch a video that shows how each of the wire stripping tools works:
Above, we told you about what are the tools for stripping the wire and how to use them correctly. Now I would like to pay attention to the rules for the removal of the most popular insulation materials.
So, when removing the outer shell, we recommend that you consider the following tips:
- If you need to remove the sheath of a coaxial cable, break the process into two steps.First you need to remove the outer shell with a soldering iron, having passed the sting in the longitudinal direction. After that, the upper braid is removed and twisted so that access to the polyethylene insulation of the central core appears. The latter, in turn, can be removed with a knife or one of the special tools that we talked about above.
- To strip the insulating material of the enameled wire, it is recommended to use a knife or a soldering iron. The first option is suitable if the core section is more than 0.2 mm.kv. In the event that the core is thinner, it is necessary to use a soldering iron to remove the enamelled coating. You can also gently remove the enamel with sandpaper, cleaning it with translational movements.
- It is better to remove the rubber coating with a special tool for stripping the wire. As we have already said, a soldering iron and a roaster are inappropriate here.
- If you need to peel off the sheath in the middle of a long cable, use an electrician's knife. Carefully slide the blade over the protective layer in the right place, and then remove the unnecessary piece of material.
- To remove the paper insulation from the cable, use the same knife. Another tool to do this is more problematic.
We hope that now you know what tools are available for stripping wires and cables. Finally, we draw your attention to the fact that stripping the outer sheath of wires under voltage is strictly prohibited by GOST rules, whatever you use in this case!