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Benefits of Copper and Aluminium for Electrical Transmission

Copper and Aluminium for Electrical Transmission

Copper and aluminium are the most commonly used materials for electrical transmission. This is because both metals have excellent conductive properties, allowing electricity to flow quickly, safely, and efficiently. But why else are copper and aluminum so important in electrical transmission? Let’s take a look at the benefits of these two metals.

Copper Conductivity

The primary reason why copper is such an essential material for electrical transmission is its high level of conductivity. In fact, copper has the highest electrical conductivity (58 MS/m at 20 °C).of all non-precious metals. Its ability to transmit electricity quickly makes it the preferred material for wiring in everything from homes to industrial machinery. Additionally, copper’s malleability allows it to be easily molded into any shape needed for a given application.

Aluminium Conductivity

While not as conductive as copper, aluminium still offers a great deal of electrical conductivity (2.82×10−8, 3.5×107).while also being lighter in weight than copper wire. This makes it an ideal choice for overhead power lines where weight can become an issue. Additionally, aluminium’s resistance to corrosion means that it is less likely to deteriorate over time, like other materials may do when exposed to harsh weather elements such as rain or snow. Furthermore, aluminum is significantly more affordable than copper, which makes it attractive from a budget perspective too.

Why copper and aluminium are used for electrical transmission lines?

Copper and aluminium are widely used for electrical transmission lines due to their physical properties. Copper is an excellent conductor of electricity and has a low resistance, which allows high voltage to pass at greater distances without significant energy losses through the form of heat. Additionally, copper is flexible and easy to shape in order to attach conductors to the insulators. Aluminium has the advantage of being one-third the weight of copper and therefore costs less when used for longer transmission lines. Furthermore, it corrodes much slower than copper and is able to withstand extreme temperatures better than other materials. Therefore, for why copper and aluminium are used for electrical transmission lines come down to their balance between efficiency, cost effectiveness, weight, corrosion resistance and ability to withstand temperature extremes.

Why do we use aluminium for making electrical transmission wires?

Aluminium has become the material of choice for electrical transmission wires due to its impressive characteristics. It is lightweight and malleable, making it easy to shape into the desired forms while still being strong and durable enough to withstand extreme temperatures and high voltage conductivity. Aluminium is non-toxic and recyclable, making it an environmentally friendly option compared to other materials such as copper and steel. Despite its cost efficiency, aluminium also has low resistance levels that result in less energy loss during transfer. This makes aluminium ideal for electricity transmission wires as it ensures maximum efficiency in power distribution, making them a go-to choice for engineers around the world who are looking for an economical solution for their needs.


In conclusion, copper and aluminum are two essential materials for electric transmission due to their excellent conductive properties and relative affordability compared with other materials. Copper has the highest electrical conductivity amongst non-precious metals, while aluminium is lightweight yet still highly efficient for conducting electricity over long distances. Both metals offer a range of advantages that make them invaluable resources in the world of electrical transmission and power distribution today.

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