How to connect aluminum and copper wire

Older houses use aluminum wire wiring. Often, when carrying out renovations in your apartment, it becomes necessary to lengthen the wires. If you use copper wires or alloys, then you can’t just connect them to aluminum wires - every electrician, and not only that, knows this rule. I will show you a simple, affordable, and most importantly reliable way to connect copper and aluminum conductors together.

Will need

• Bolt or screw with M4 thread, 16 mm long.
  
• Three wide washers for M4.
  
• Grover M4.
  
• M4 nut.
  

The sizes may well be different, I’m just giving a list of what I used.

Connection of aluminum and copper conductors

We clean the ends of the wires that we will connect. We take pliers and make rings at the ends of the wires.

Rings on both. They can be made with another tool or even manually.

Next we put a washer on the screw. Its width should be greater than the ring of bare wire. Then we put on a ring of aluminum wire, so that when further screwing the connection, this ring on the wire does not loosen.

Then we put on another washer and after it a copper wire.

And on top of everything we put the third washer on top and secure it with a nut.

Tighten with a tool.

We insulate well with electrical tape.


The insulation must be reliable; it is advisable to apply two or three layers of electrical tape. This is what the connection looks like in the junction box.

This connection of wires will be reliable. The grower will maintain pressure if the connection suddenly becomes loose. So you can safely close it with a lid and hide it behind a layer of plaster.

Of course, there are many other devices on the market for connecting wires, but it seems to me that this method is the most reliable and durable.

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