What must ground cables be securely attached to in order to ensure safety?

Ground cables must be securely attached to steel structures, equipment, and fence posts using proper connectors to ensure safety. Steel structures provide a robust and conductive pathway for electrical currents, which is essential in grounding systems to prevent dangerous electrical shocks and equipment failure. Properly connecting ground cables to these materials ensures that any stray electrical currents are safely diverted to the ground, thereby reducing the risk of electrical hazards.

Using proper connectors is also crucial, as they maintain a strong and reliable connection to ensure the effectiveness of the grounding system over time. This is particularly important in high-demand electrical environments, such as substations, where reliable grounding is critical for system protection and personnel safety. Other materials like wood, plastic, or concrete are not suitable for grounding as they do not provide the necessary conductivity or structural support that grounding systems require.