What percentages represent the conductivity, tensile strength, and weight of aluminum compared to copper?

The correct representation of the conductivity, tensile strength, and weight of aluminum compared to copper is reflected in the choice that indicates 60% for conductivity, 45% for tensile strength, and 33% for weight.

Aluminum is often used as an alternative to copper in various electrical applications, particularly because of its favorable conductivity and lighter weight. Specifically, aluminum’s electrical conductivity is approximately 60% that of copper, which allows it to carry a significant current while being lighter, making installation easier.

Regarding tensile strength, aluminum has about 45% the tensile strength of copper. Although it is generally less strong than copper, its lower weight and cost-effectiveness make it preferable in many overhead line applications. Finally, when discussing weight, aluminum is significantly lighter, weighing in at about 33% of the weight of copper for a similar volume, which is particularly advantageous for reducing sag and supporting structures in overhead lines.

The respective percentages in this choice accurately reflect these properties, showcasing aluminum's unique advantages when used in electrical wiring and components compared to copper. These characteristics are essential for linemen to understand when choosing materials for efficiency and safety in electrical distribution systems.