When installing more than one ground rod, the MINIMUM spacing between rods?

• A. 3 ft
• B. 9 ft
• C. 12 ft
• D. 6 ft

Answer: (D)

The idea is to ensure multiple grounding rods provide multiple independent paths for fault current to reach earth, which lowers the overall grounding impedance. If rods are placed too close, their electrical fields overlap and they act more like a single electrode, offering less additional benefit from adding more rods. Six feet is the minimum spacing that maintains each rod as a separate path to ground, improving the effectiveness of the grounding system. You can space them farther apart if needed, but six feet is the required minimum.