How to connect the aluminum and copper wire?

I think everyone knows that it is impossible to combine aluminum and copper wires usual twist. Or rather, you can connect, but then over time the wires are oxidized and the wiring in this place can oplavitsya or even ignite. In the best case, just be burned contacts, and at worst - a fire may start. Here is a good example of what happens to the copper and aluminum wires in conventional stranding.

To avoid such consequences, the wire should be connected so that they are not in contact with each other. There are quite a few ways, how to combine aluminum and copper wires thusandtoday we look at 3 most common and available from them.

1. Compound wires via bolt

The most affordable way to connect the wires, which can be improvised, it is to connect copper and Aluminum wires by a conventional steel bolts (screws) M4 or M5, several washers (not galvanized) and nuts.

For this bends the wire ends in the form of rings, dress washer onto the bolt, then aluminum wire, washer again, copper wire, has one goal and twists all the nuts. Washers should be selected so that all ear wires overlap. Still, it is advisable to use a spring washer that contacts are not diminished with time. In the end, it turns out that's a "sandwich."

In the end, of course, the whole thing isolate. Thus between the aluminum and copper wire is a kind of partition in the form of a steel washer, which will not allow them to oxidize. But this design has a hefty minus, it is quite cumbersome.

2. Connection via screw terminal block

One of the most common ways to connect the copper wire and aluminum, is a compound with screw terminal blocks. The cost of such shoes in the area of ​​30 rubles per section. Inside them is a brass tube with screws, which allow you to quickly connect the wires.

When connecting wires should bear in mind that there is no partitions inside the tube, so the copper and aluminum conductors must be inserted so that they do not touch each other.

Deficiencies in the terminal block a few: they fix the problematic stranded wire, but to avoid it inconvenience, the sleeve can be compressed core tip, and a second drawback is that over time, the clamp screw may weaken.

3. German wiring terminals Wago

Probably one of the easiest and most reliable ways to connect copper and aluminum wire, is to use the German terminals. At least, I used to just them, until not completely replaced all the wiring in your home.

They are very easy to operate, the wires are simply inserted into the opening until it stops. Inside they are securely clamped plate. Plus the terminals in that each wire is in a separate section, and they are not touching each other. In addition, in the terminal there is a special paste that prevents the oxidation wires. The disadvantage is that compared with the terminal blocks, the German terminals are much more expensive - from 10 rubles apiece (depending on the number of holes) and they are disposable.

Each of these methods has its drawbacks, but any of them will help you avoid unwanted effects that may occur during normal stranding aluminum and copper wires. At the end I want to add, if you have the opportunity, the best way to be a complete replacement of aluminum wiring on a copper and then you definitely will not be any problems. That's all, do not forget to subscribe to the channel "Podelkin"And write in the comments what you think!