A substation ground grid is normally buried beneath how many inches of surfacing material?

A substation ground grid is typically buried beneath 12 to 18 inches of surfacing material to ensure proper grounding and safety for the electrical infrastructure. This depth provides adequate insulation from surface-level disturbances while maintaining efficient electrical grounding to protect against lightning strikes and other transient overvoltages. The greater the depth of the ground grid, the more effective it is in dispersing fault current, which in turn enhances both system performance and safety for personnel working near the substation. Additionally, this depth helps prevent potential erosion or mechanical damage from surface activities, further preserving the integrity of the grounding system over time.