How to build up or connect two electrical wires or cables

Today we will tell how to build up or connect two electrical wires or cables. You will see that the techniques are numerous. Which one to choose for electrical cables, decide for yourself. They say that aluminum and copper wire can not be docked. Indeed, electrochemical corrosion will develop. For an apartment it will come down as an option, in the open air the electrical connection of the wires or cables will loosen, the joint will warm up until a malfunction occurs.

How to connect multiple wires or cables

The picture shows in sequence the connection of wires.

Variants of joining the wires

Designer from steel

The first method of connecting the wires is based on the old children's designer. Anyone will be able to cut out of the strip like this( we do not take copper because of the high cost).The electrical conductivity of steel is 7 times less than that of the red core, shown in the figure has a resistance connection of the wires of 0.1 Ohm. As for electrochemical corrosion, galvanized steel is better for such joints. It is the only metal that can get along with copper in damp conditions. In this case, it is permissible to use scraps of old sanitary pipes( on the external surface).Remember to mechanically strip the wires to reduce the electrical resistance of the joint. After pressing the bolt and nut design will last a long time. Plus wire connections using the bus in relatively simple switching. It is permissible to put the bar on the insulating feet, for example, in a junction box. This is not an option for the house, but rather a country house out of the situation when there was no shop nearby. Steel is not as aggressive as copper, with a certain amount of danger it is possible to cling to aluminum.

Nut and Bolt

The second connection of the wires demonstrates how to proceed when you need to connect two conductors to a socket or switch. The metal is not taken heterogeneous, otherwise a steel washer is laid between the bad neighbors. Before docking the wires should be round pliers to make rings on the ends of each wire. Then the conductors are consistently put on the bolt, the nut is tightened. The task of connecting wires is often solved on the outlets. Specially adapted for this electrical equipment is more expensive than usual, not everyone wants to pay. In particular, if the current consumption at the junction of the wires is small. Check with a tester for resistance to be acceptable and use it for health. Mounting method: the wall is dug through, then the general socket for two sockets located on both sides is sealed. During installation, the first point is divorced from the second. The advantage is that no additional equipment is required.

Stripping pliers

Bolt, nut, washer

The third connection is considered a classic. With the help of a bolt, nut and washers, you can connect three electrical wires and more. With the help of round pliers, you need to wind the ring at the end of each core, then the lines are simply screwed together. For dissimilar metals, use steel separating washers; if the threads are not enough, add gravels. When using copper wiring of the transformer( as shown in the photo) take the trouble to clean the lacquer insulation( we do not recommend to wash it away, it takes a long time).The connection is collapsible, suitable for switching the wires as needed.


The terminal variant reduces the resistance of the electrical connection, solves the complexity of electrochemical corrosion. As can be seen from the photo, installation is carried out in various ways. One aluminum core is soldered to the terminal. For the result, a special acid( flux) is used to solder the aviation metal. The process is long and tedious, but the quality is excellent. Please note brass terminals are not included in the electrochemical corrosion of copper or aluminum. It is permissible to join the conductors of any type. Easier soldered copper. The second end is simply compressed. At the terminal there are two rows of bending hooks: the first for a metal conductor, the second for insulation. The connection is strong, if you properly strip the wire and correctly use the pliers.


Splitter allows you to combine two lines into a single. This is often required when breeding wiring for the lighting system: halls, separate bathrooms. It is necessary to apply a zero wire to each cartridge, an eyeliner of four conductors is considered an impermissible luxury. Used branching technique. From the single end, the core is crimped with a knife( a metal protrusion at the bottom of the structure), from the opposite wire is squeezed in the image of the previous version. Carefully clean the insulation, do not remove too much, it reduces the strength of the connection.

Cable capsIn this case, the cores are slightly trimmed, then tightly pressed onto a vice or pliers. This works for copper wires of particular flexibility( they consist of many small wires).For a metal with a large cross section, the technique is much worse. Especially tight extravagant method to combine different in thickness of the core. Russian caps are threaded. Then the cores slightly twist together, are inserted inside, then it is recommended to turn it clockwise several times. The method is suitable for especially flexible wires, for thick sections it works much worse. However, today the power cable is often the first kind, you should not worry much.

Crimping pliers

The following type of connection is more commonly used as part of the filler sleeves. For the work you need a tool, in the photo lying next to the sample. This is a kind of crimping pliers. In the area of ​​the handle docks are located to remove the insulation from the conductors of different diameters. In the course of work, the tool slightly warps;We conclude that the device is suitable only for single thick veins. For them, stripping is done without a hitch. As for the coupling, inside is a metal tube that is clamped, firmly squeezing the metal. It happens like cold welding, here the main thing to get into the bull's eye. In the case of the correct execution of the clutch firmly holds the metal. Warning, we need practice handling tools. The instance shown in the photo was purchased at FixPrice for a bargain price.

Terminal Terminal

Connecting Terminal Block

Terminal Terminal( see photo) is considered to be the standard means for connecting two wires of different types. The device is sometimes available as a tire. In standard, the terminal block is a pair of clamping contacts separated by a dielectric. Fixing is carried out with small bolts. Tire version made of brass and, if necessary, able to be mounted inside the junction box. The terminal block is considered the standard version of the docking operation. The well-known A. Zemskov recommends this method along with the filler sleeves. Plus methods: switching is easily corrected in case of malfunctions, installation is easy and intuitive. Electrochemical corrosion does not threaten. The only negative is seen if the mass lived, but there is no place. It is much better to use individual terminals according to the scheme described above in the list. The price of the terminal block is high, but the wires can be repaired a lot.


A special kind of terminal strip is considered to be a "nut".These are two large plates, tightened with cogs at the four corners. The design is embedded in a collapsible case with cable entries on each side. It turns out a kind of cross, where lead veins. Plus, in good sealing design and the possibility of individually tighten each side. However, the "nut" takes a lot of space. It is not always possible to connect two electrical wires in this way. Often in the middle of the terminal block there is a third plate - for the separation of copper and aluminum wires in order to avoid electrochemical corrosion.

Twisting the wires

Finally left twisted. Let's talk how to do it right. The veins are taken at a 90 degree angle. Then they just wrap themselves around each other. If you bother to look inside the halogen bulb base, it is likely that the bulb electrodes are connected in the same way. Craftsmen perform this operation with the help of ticks for mating reinforcement. The process of twisting resembles the work with a bicycle pump - you drive a pen to and fro.

Pliers are needed for base reinforcement nodal fixings. This is done with the help of steel wire, if the builder begins to do the work without the help of a special tool, the brushes will not stand for long. Ticks greatly facilitate the process. The wire is captured, the handles are placed on the stopper. It remains to pull the drive itself to get a high-quality twist.

Fill-in sleeves are used for cable docking. All conductors on both sides are stripped of insulation, are combined using the chosen method from those described, then the node is closed with a casing. The device demonstrates a couple of holes, one of which carries a threaded joint and a puncturer in the form of a needle. Included is a sealed bag, divided in two and containing components of epoxy glue in sections. Filling process:

  • Gently grab the bag on both sides and pull. The jumper is broken between the sections.
  • You need to mix both components well, squeezing the package with your hands.
  • The outlet neck is screwed into the inlet socket of the housing of the filler sleeve until the piercer pierces the diaphragm.
  • Gently push the contents of the bag into the body while there is enough space inside.
  • The compound is held in a vertical position so that the epoxy glue has time to harden.

Which wire and cable connections should not be used

A. Zemskov lists the types of connections that should not be used:

  1. Soldering. It is clear - it is difficult to create a high-quality weld without a torch, it is impossible to disassemble.
  2. Twist. A. Zemskov criticizes those who demonstrate the superpowers of this compound by the example of currents of 80 A( the cross section of the core is 2.5 square millimeters in copper).In fact, it is impossible to bring the wiring to such a state. Automaton protection. Stranding is not considered a collapsible joint. Physically, this can be done, the process takes a lot of time. We recommend the use of twisting in one case - as part of a non-separable connections, for example, water couplings.
  3. Welding has the pros and cons of soldering, but withstands high currents due to obvious facts.

In the end, the method depends on the purpose:

  • If you want to connect two electric cables, a complex coupling of any type( and filler) is used.
  • To build up the electrical wire, you can use twisting, but you need to understand that it will be difficult to disassemble.

Now readers know how to build an electrical cable.

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