When self-grounding 120-volt duplex receptacles are installed in a box set back from a sheetrock wall, does the NEC require the ground to be bonded at the last box?

When self-grounding 120-volt duplex receptacles are installed in a box set back from a sheetrock wall, does the NEC require the ground to be bonded at the last box?

• A. Yes
• B. No
• C. Only if all receptacles are grounded
• D. Yes, but only in commercial installations

Answer: (A)

When self-grounding 120-volt duplex receptacles are installed in a box that is set back from a sheetrock wall, the National Electrical Code (NEC) mandates that the ground should be bonded at the last box. This requirement ensures that the grounding system maintains continuity and provides a reliable path for fault current, which is essential for safety and system protection. The bonding at the last box is crucial because it solidifies the effectiveness of the grounding system throughout the circuit. If the ground is not properly bonded, it could lead to potential hazards such as equipment damage, shock risks, or fire hazards due to inequalities in ground potential. This scenario emphasizes the importance of adhering to NEC requirements for grounding in residential and commercial settings alike, ensuring that all receptacles are effectively grounded, contributing to overall electrical safety.

When self-grounding 120-volt duplex receptacles are installed in a box that is set back from a sheetrock wall, the National Electrical Code (NEC) mandates that the ground should be bonded at the last box. This requirement ensures that the grounding system maintains continuity and provides a reliable path for fault current, which is essential for safety and system protection.

The bonding at the last box is crucial because it solidifies the effectiveness of the grounding system throughout the circuit. If the ground is not properly bonded, it could lead to potential hazards such as equipment damage, shock risks, or fire hazards due to inequalities in ground potential.

This scenario emphasizes the importance of adhering to NEC requirements for grounding in residential and commercial settings alike, ensuring that all receptacles are effectively grounded, contributing to overall electrical safety.