When replacing electrical wiring elements, did you have to connect incompatible copper and aluminum wires? Do you procrastinate for fear of making a mistake? Do not be afraid, below we will analyze the installation methods that even an inexperienced master can handle. In case of non-compliance with the recommendations, there is a possibility of oxidation of the wires in the future, which entails a danger to the premises.



  • a Nut Compression Method
  • 2 Twisting followed by welding
  • 3 Screw terminals
  • 4 Crimping method

Nut Compression Method

To perform wire clamping using the “nut” connector, you will need to purchase this item. You can usually find it in any store or market in the electrical department.

The coin is a small plastic box, inside which there are plates in the amount of 3 coins. The clamping levels are fixed with screws, thanks to which the contacts are compressed.


The wire connection sequence includes the following manipulations:

  • the screws are removed from the nut;
  • both wires are laid inside;
  • the structure is well tightened with screws.

Thanks to simple gestures, it will be possible to quickly implement the plan. Single-pole and multi-pole contacts can be used.

The disadvantage of this method is the large size of the product. This is why it will not be possible to mount it in electrical panels, technical boxes. The method is more suitable for external use.

Twisting followed by welding

Since the two metals are incompatible with each other, and with ordinary twisting there is a risk of destruction due to oxidation, they can be connected using a soldering iron.

For this you will need:

  • solder for soldering iron (lead-tin);
  • vitriol solution;
  • crown pile;
  • insulating tape;
  • piece of copper wire.

The technology consists of the following order:

  • tin each wire with a soldering iron;
  • vitriol is applied to an aluminum core;
  • the design is connected to the battery on its minus;
  • a copper core is wound on plus piles;
  • the reverse side of the core is lowered into a container with vitriol;
  • after waiting a bit, you can see how the aluminum core will coat itself with copper;
  • after the process is completed, it will remain to twist, then solder with a copper wire;
  • the resulting connection must be insulated with electrical tape.

The connection made in this way can be left inside the wall, since it is secure enough, there is no need to worry about the condition of the wires in the future.

Screw terminals

Terminal blocks can be purchased on the market for electrical appliances, they are distinguished by a fairly low price and ease of use. The device is made of plastic, consists of two holes for wires.

Copper and aluminum contacts are inserted into the provided holes, after which they are tightened with fixing screws. The scheme is simple, but screw connections can lose strength over time, after which they will need to be tightened with a screwdriver.

If it is easy to access the elements, the method is good because it is safe and simple.

Crimping method

Pressing is the most reliable way. To carry out the work you will need:

  • soldering iron;
  • special aluminum socket;
  • solder (lead-tin);
  • heat shrink or adhesive tape.

The connection is carried out in the following order:

  • contacts are cleaned using prepared solder;
  • an oxide film is removed from the aluminum core;
  • the two wires are inserted into the sleeve;
  • tightening (pressure test) of the contacts is carried out;
  • isolation is achieved.

The connection is ready, the resulting twist can be mounted on the wall.

By choosing the most suitable method, it will be possible to connect copper and aluminum wires simply and above all safely.