What is neutral-to-ground bonding at service equipment?

What is neutral-to-ground bonding at service equipment?

• A. The bond between the neutral conductor and the grounding electrode system at the service disconnect.
• B. The bonding of hot conductors inside a panel.
• C. A method to join conductors using wirenuts.
• D. The insulation color code used for grounding.

Answer: (A)

Neutral-to-ground bonding at service equipment is the connection that ties the neutral conductor to the grounding electrode system at the main service disconnect. This creates a single reference point so the neutral and earth are at the same electrical potential. It provides a return path for fault current back to the source, allowing the overcurrent device to trip if a fault occurs. This bonding is required at the service equipment, while neutrals and grounds are kept separate in downstream panels to prevent stray currents on grounding paths. Bonding hot conductors inside a panel, joining conductors with wirenuts, or using insulation color codes for grounding describe other ideas and do not define this service-point bond.

Neutral-to-ground bonding at service equipment is the connection that ties the neutral conductor to the grounding electrode system at the main service disconnect. This creates a single reference point so the neutral and earth are at the same electrical potential. It provides a return path for fault current back to the source, allowing the overcurrent device to trip if a fault occurs. This bonding is required at the service equipment, while neutrals and grounds are kept separate in downstream panels to prevent stray currents on grounding paths. Bonding hot conductors inside a panel, joining conductors with wirenuts, or using insulation color codes for grounding describe other ideas and do not define this service-point bond.