When installing two ground rods, what is the minimum distance between them?

When installing two ground rods, what is the minimum distance between them?

• A. 3'
• B. 6'
• C. 8'
• D. 10'

Answer: (B)

Grounding electrodes work best when each rod provides its own path to earth. If two ground rods are placed too close, their electrical fields overlap and they don’t contribute independently to reducing the overall grounding impedance. The minimum distance allows each rod to influence the earth separately, giving a more reliable grounding path. That distance is six feet. Placing them farther apart, like eight or ten feet, is fine and often used, but six feet is the smallest spacing that meets the requirement. Remember to bond all grounding electrodes together as part of the grounding electrode system.

Grounding electrodes work best when each rod provides its own path to earth. If two ground rods are placed too close, their electrical fields overlap and they don’t contribute independently to reducing the overall grounding impedance. The minimum distance allows each rod to influence the earth separately, giving a more reliable grounding path. That distance is six feet. Placing them farther apart, like eight or ten feet, is fine and often used, but six feet is the smallest spacing that meets the requirement. Remember to bond all grounding electrodes together as part of the grounding electrode system.