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

The conductivity of aluminum is approximately 2/3 that of copper. This means that although aluminum is a good conductor of electricity, it does not quite match the superior conductivity that copper offers. This characteristic is important for linemen to understand, especially when choosing materials for electrical wiring and connections.

Copper is often used in applications where higher conductivity is preferred, such as in power transmission and electrical systems. Its higher conductivity allows for smaller cross-sectional areas of wire to carry the same current compared to aluminum. However, aluminum is lighter and less expensive than copper, making it a practical choice for certain applications, particularly in overhead power lines.

Understanding the comparative conductivity of these two metals helps in determining the most efficient and cost-effective material for specific electrical projects while considering factors like weight, cost, and performance.