What is the primary purpose of grounding and bonding in electrical installations?

• A. To provide shock protection and limit voltage surges
• B. To improve aesthetics
• C. To deliver power more efficiently
• D. To reduce insulation costs

Answer: (A)

Grounding and bonding are about safety: they create a safe reference for the electrical system and give fault currents a low-impedance path to earth. Bonding ties together all exposed metal parts so they stay at the same potential, while grounding provides a reference point and a path for fault current to return to earth. When a fault occurs, this arrangement allows the protective device to trip quickly, reducing the chance of a person receiving a shock. It also helps control transient voltages from lightning or switching, limiting the voltage on conductive surfaces. So, the primary purpose is to provide shock protection and limit voltage surges. These functions aren’t about aesthetics, efficiency, or insulation costs.