What are cross arms used for on utility poles?

Cross arms are critical components attached to utility poles, primarily utilized to support power lines and related electrical equipment. These horizontal structures enable the proper spacing and arrangement of the wires, ensuring they are safely and effectively held above the ground and away from other objects and each other.

By providing this support, cross arms help to maintain the integrity and functionality of the electrical distribution system. They also contribute to safety measures, allowing adequate clearance between live wires and the ground or structures, significantly reducing the risk of electrical hazards.

While the other options mention aspects related to utility poles, they do not directly describe the primary purpose of cross arms, which is focused on the support of power lines and equipment. Therefore, the correct answer highlights the vital role of cross arms in the infrastructure of power distribution.