Which statement about grounding is true?

Which statement about grounding is true?

• A. Grounding and bonding create safe pathways for fault currents to dissipate.
• B. Grounding increases fault current magnitude.
• C. Bonding isolates equipment from the earth.
• D. Grounding eliminates the need for protective devices.

Answer: (B)

Grounding and bonding create a safe path for fault currents to flow and keep exposed conductive surfaces at the same potential. When a fault occurs, having a low-impedance path to earth allows the fault current to flow back to the source reliably, which helps quickly trigger protective devices and limit shock risk and equipment damage. Grounding sets a reference and provides the return path, while bonding ensures all metal parts are at the same potential, preventing dangerous voltage differences between them. The idea that grounding simply “increases fault current magnitude” is not the best description. The actual fault current depends on the source impedance and the fault path; grounding gives a dependable return path and stable voltages, not a guaranteed increase in fault current on its own. The other statements—bonding isolating equipment from earth or grounding eliminating the need for protective devices—are not correct.

Grounding and bonding create a safe path for fault currents to flow and keep exposed conductive surfaces at the same potential. When a fault occurs, having a low-impedance path to earth allows the fault current to flow back to the source reliably, which helps quickly trigger protective devices and limit shock risk and equipment damage. Grounding sets a reference and provides the return path, while bonding ensures all metal parts are at the same potential, preventing dangerous voltage differences between them.

The idea that grounding simply “increases fault current magnitude” is not the best description. The actual fault current depends on the source impedance and the fault path; grounding gives a dependable return path and stable voltages, not a guaranteed increase in fault current on its own. The other statements—bonding isolating equipment from earth or grounding eliminating the need for protective devices—are not correct.