Which of the following statements about aluminum wire is true?

Aluminum wire is indeed lighter than copper wire, which is a key advantage when considering material for overhead power lines and other applications. The reduced weight of aluminum allows for easier handling and installation, particularly in utility arborist work where managing equipment and materials can be critical to safety and efficiency.

When comparing electrical conductivity, while aluminum does have a lower conductivity than copper, it is often used in larger diameters to compensate for this difference. Although aluminum can span longer distances when sized appropriately, it generally needs to be thicker than copper to carry the same amount of current due to its lower conductivity. Lastly, aluminum wire typically costs less than copper wire, which further reinforces its usage in utility applications.

In summary, the characteristic of being lighter than copper makes aluminum wire a practical choice in many scenarios within electrical installations, especially when weight is a consideration.