How does the inspector verify proper grounding at a dwelling?

• A. By measuring the color of wires.
• B. By checking the presence and integrity of the grounding electrode system, bonding connections, and continuity of the equipment grounding conductors.
• C. By testing the main disconnect.
• D. By counting the number of panels.

Answer: (B)

Grounding verification focuses on confirming a proper grounding path that safely conducts fault current to earth and ties all conductive parts to the same potential. The inspector checks that the grounding electrode system is present and correctly bonded to the service equipment, meaning the grounding electrode conductor is connected to proper ground rods or other electrodes and to the service panel. They also verify bonding connections to metal parts like water piping and any other required bonding jumpers so everything in the structure shares a single electrical potential. In addition, the continuity of the equipment grounding conductors from the main panel to outlets and fixed equipment must be intact, providing a continuous, low-impedance path for fault current to trip the overcurrent device. This approach ensures safety by minimizing shock risk and making fault clearance reliable. The other options don’t address grounding: wire color isn’t a proof of grounding quality, testing the main disconnect isn’t the method for verifying grounding, and counting panels isn’t related to establishing a proper ground path.