What purpose do guy wires serve in electrical installations?

Guy wires are vital components used primarily for providing structural support in various electrical installations, especially in high-tension transmission lines and communication towers. They are tensioned cables that connect tall structures to the ground or to other anchor points, helping to stabilize and prevent them from swaying or collapsing under environmental stress such as wind or the weight of ice and snow.

By extending diagonally from the structure to anchors in the ground, guy wires effectively distribute loads and forces acting on the installation, ensuring safety and functionality. This support is crucial in maintaining the integrity of electrical installations which may include transmission towers, antenna masts, and various other structures that need to maintain a vertical position and withstand external forces.

The other options, while relevant to electrical systems in a broader context, do not accurately describe the specific function of guy wires. Insulating electrical cables, shielding against lightning strikes, and connecting systems to ground relate to different aspects of electrical safety and functionality, rather than the direct support role that guy wires fulfill.