How does the conductivity of aluminum compare to that of copper?

The conductivity of aluminum is approximately 60% that of copper. This means that aluminum can carry about 60% of the electrical current that copper can carry for a given cross-sectional area. This property is crucial in the electrical industry, as it influences the material choices for various applications. The higher conductivity of copper allows it to transfer energy more efficiently compared to aluminum.

Understanding the conductivity of these materials helps in making informed decisions when selecting wire types for electrical systems. Aluminum is often chosen for long-distance transmission lines because it is lighter and generally more cost-effective than copper, even though it has lower conductivity. Therefore, while it may not conduct electricity as well as copper, it still serves a significant role in the distribution of electricity, particularly where weight and cost are critical factors.