How many Neutral to Ground bonds are allowed?

• A. One
• B. Two
• C. None
• D. Multiple

Answer: (A)

Only one Neutral-to-Ground bond is allowed in a system. Bonding neutral to earth at a single point provides a single reference for the electrical system and creates a clear path for fault current to return to the source, enabling protective devices to trip properly when faults occur. Having multiple bonds introduces parallel paths for current between neutral and ground, which can cause circulating currents on grounding conductors, create voltage on equipment enclosures, and degrade fault protection. The bond is typically placed at the main service disconnect or service equipment, with downstream grounds kept separate to preserve proper operation.