Contents
- 1 Twisting and soldering of two wires
- 2 Connection of aluminum and copper wires using terminals
- 3 Connection of cables with screws and washers
- 4 Termination with clamp У733
- 5 Connection of several outlets with a cable
- 6 Self-clamp terminals Wago
- 7 Connection of two conductors with
welding Types of connection of aluminum and copper wires. The site of a one-room apartment repair will share secrets. Twisting and soldering two wires
More recently, twisting was the main way to connect the wires in the home electrical wiring, and often in the production premises. In modern rules for the installation of electrical installations, this method is not even mentioned, although in practice it is still being used.
Very reliable contact provides soldering, for preparation to which the preliminary twist is perfectly appropriate and even necessary for a larger contact area( considering that the solder electrical conductivity is lower than that of the soldered materials) and mechanical strength.
Soldering requires 60 - 100 watts soldering. First you need to remove the wires from the insulation( 4 to 5 cm), clean them with fine sandpaper and irradiate, i.e.cover with a thin layer of solder. For copper wires, conventional rosin( solid or as a solution) or special pasty or liquid fluxes can be used. Rosin and neutral flux-free fluxes do not require subsequent removal, becausedo not cause corrosion. Soldering acid and other active fluxes are undesirable - their residues can cause corrosion of wires and even a short circuit. There are also soldering materials for aluminum, but their use is not recommended.
Zaluzhennye wires are twisted, then thoroughly soldered. The soldering should cool naturally, without forced cooling, which can lead to cracks in the joint. Ready-made soldering is conveniently insulated with a shrink tube of a suitable size, which when heated tightly covers the junction. This is the most reliable way to connect electrical wires and cables, both copper and aluminum. Another option is a conventional insulation tape, preferably at least 3 layers.
Screw the wires for later splicing. 
Twisting of electrical wires for connection in a junction box. Connecting isolating clamps( PPE) can be considered a modern version of the old wire twisting. It is a plastic housing having an anodized spring of conical shape inside. Connectable wires are stripped to a length of 10 - 15 mm, assembled into a bundle and screwed on them PPE - clockwise, to the stop. The total area of the connection, depending on the size - from 2.5 to 20 sq. M.The connection quality is quite high, but somewhat less than that of the screw terminals.
Connecting insulating clamps( PPE) - modern ways of connecting two or three or more cores of copper wires. Connection of aluminum and copper wires using the
terminals The most common screw terminals are often used in junction boxes. They are produced both for small and very high currents. When using aluminum cores, care should be taken when tightening the screws, because it is soft( and sometimes also brittle) and easily damaged.
The terminal connection is an old and reliable way. Connection of cables with screws and washers
This somewhat obsolete version, suitable in the absence of screw terminals of suitable size, provides the same quality, it can be used to connect an aluminum wire to a copper wire.
Connection by screw terminal, through washers. Termination with clip U733
This is actually a variant of the screw terminal block, it allows you to make branches from the main, without cutting it.
Branch using clamp in 733. Connecting several outlets with the
cable In this way, the sockets can actually be used as screw terminals, but for greater reliability of the wire connection it should be soldered.
Connection of multiple outlets with a flat cable. Self-clamping terminal blocks Wago
Self-clamping terminals allow connecting electric wires of cross-section up to 2.5 square millimeters, the admissible current can be up to 24 A. This is a very fast and technological way of connection. Stripping is carried out for a length of only 10-12 mm, no twisting, no isolation, no even tightening of the screws is required. The wires are simply inserted into the terminal board. It will not be possible to connect only flexible multicore wires. Another drawback - in connection with the smaller contact area, this connection is still somewhat less reliable than a screw terminal or, especially, soldering or welding.
Wago terminals. The most common types of connection of the two veins are both aluminum and copper. Connection of two cable cores by
welding This is the most reliable connection method, it provides perfect contact and a very long period of trouble-free operation. Electric wires are twisted to a length of at least 50 mm, copper wires are welded by a special carbon electrode with a copper coating. It is best to use an inverter welding machine, although other options are possible. When welding wires, as in any other welding work, strict adherence to safety precautions is necessary.
Connection of aluminum, copper wires and cables by welding is the most reliable method of all kinds. 
