What is the main purpose of a guy wire?

A guy wire is a critical component used in utility pole and tower construction, primarily designed to stabilize poles and other structures against lateral loads, such as wind or seismic activity. When a pole is subject to these horizontal forces, the guy wire acts as a tensioned line that counterbalances the stress, preventing tipping or swaying. This stability is essential in maintaining the integrity and safety of the electrical infrastructure.

While other options mention different functions, such as providing power or grounding connections, these do not accurately describe the primary role of guy wires. They are not meant for power transmission, holding transformers, or connecting to the ground, but rather serve to ensure that the vertical structures remain upright and secure in the face of external forces. This function is especially vital in areas prone to strong winds or other environmental factors that could otherwise compromise the structure's stability.