Why is Copper a Better Conductor Than Aluminum?

Regarding electrical conductivity, copper is widely considered a superior material to aluminum. Copper has been the go-to material for electrical wiring for over a century, but why is copper a better conductor than aluminum? In this article, we’ll look at both materials’ properties and explain why copper proves more efficient at conducting current.


Conductivity is the ability of a material to conduct electricity. Copper has a higher electrical conductivity rating than aluminum, making it a better conductor. With an electrical conductivity rating of 58.5 megameters per meter (m/O), copper can conduct electricity more efficiently than aluminum.


Resistance is the measure of how much a material resists electricity flow. Copper has lower resistance than aluminum, making it more efficient at conducting electricity. Copper’s resistance is 0.0162 O/m while aluminum’s is 0.0264 O/m; this makes copper less likely to overheat and more durable in high-load applications.


Copper wire is more malleable than aluminum, making it easier to work with. Copper can be bent and twisted without breaking, making it the ideal material for electrical wiring. On the other hand, aluminum wire is more brittle and may break or crack when bent or twisted – leading to issues in your electrical system that may necessitate more frequent maintenance flowerstips checks.

Corrosion Resistance

Copper is more corrosion-resistant than aluminum, which lasts longer and requires fewer repairs. Copper naturally has an oxide layer protecting it from attack, while aluminum does not. When aluminum is exposed to air, it forms an oxide layer – aluminum oxide – which can lead to corrosion if not kept properly. This makes copper an ideal material for electrical wiring due to its greater longevity and dependability.

Thermal Conductivity

Thermal conductivity is the capacity of a material to conduct heat. Copper has more excellent thermal conductivity than aluminum, which can dissipate heat more effectively. This property makes electrical wiring essential as it prevents overheating and potential damage to the system. Furthermore, copper has higher melting points than aluminum, so it can withstand higher temperatures without melting or deforming.


Copper is a more efficient conductor than aluminum. However, it also costs more, and this is due to the higher cost of copper as an input material and manufacturing and processing copper wire. This may make copper less cost-effective for specific applications with lower electrical loads.

Bottom Line

Finally, copper is a superior conductor to aluminum due to its higher conductivity, lower resistance, greater flexibility, improved corrosion resistance, more excellent thermal conductivity, and higher melting point. Copper may be more costly than aluminum, but it’s a more durable and reliable material for electrical wiring. 

Copper is often chosen over aluminum in residential and commercial applications due to its superior reliability. However, aluminum can still be utilized in specific applications with lower electrical loads due to its cost-saving ailovemusic benefits. 

Ultimately, deciding between copper and aluminum depends on your application and electrical load requirements. You should consult a licensed electrician to determine which material best meets your electrical needs.