What is the main purpose of grounding and bonding in a dwelling?

• A. To provide a low-resistance path to earth for fault currents
• B. To reduce energy consumption
• C. To regulate voltage
• D. To color-code wires

Answer: (A)

Grounding and bonding exist to keep people safe by giving fault currents a reliable path to earth so protective devices can act quickly. When a fault makes metal parts become energized, a low-resistance path to earth lets the surge flow back to the source, causing breakers or fuses to trip and stopping the dangerous current. Bonding adds to this safety by tying all exposed conductive parts together so they sit at the same electrical potential, minimizing the chance of shock if someone touches two different metal parts.

So the main purpose is to provide that low-impedance return to earth for fault currents, which reduces shock risk and helps the electrical system clear faults fast. It’s not about reducing energy use, regulating voltage, or color-coding wires.