¿Por qué no se pueden conectar cables de cobre y aluminio??

Por tanto, el cobre y el aluminio no deben conectarse directamente.. Si la conexión cobre-aluminio es inevitable, copper-aluminum transition clips or copper-aluminum transition joints are required.

If they are directly connected, once they meet the electrolyte formed by water, carbon dioxide and other impurities, a chemical battery will be formed. This is because aluminum is easy to lose electrons to become a negative electrode, and copper is difficult to lose electrons to become a positive electrode. An electromotive force of 1.69V is formed between, and a small current passes through, which corrodes the aluminum wire, which is the so-called galvanic corrosion. This will cause poor contact between copper and aluminum and increase the contact resistance. When a current passes through, the temperature of the joint will increase, which will further accelerate the corrosion of the joint, increase the contact resistance, and cause a vicious circle until it burns out.