Which statement about bonding with pipes is correct?

• A. To ensure continuity of the earthing path
• B. To stop corrosion
• C. To insulate the pipe
• D. To vent gas

Answer: (A)

Bonding metal pipes creates a continuous earth path, so fault currents have a low-impedance route back to the source. When metal pipes such as water or gas lines are bonded to the protective earth, they’re kept at the same potential as the rest of the earth network. If a fault occurs, the fault current can return quickly, causing the protective device to trip and reducing the risk of electric shock to anyone touching the pipe.

This safety focus is why bonding is the correct approach. It isn’t about stopping corrosion, insulating the pipe, or venting gas—those are different concerns (corrosion control, electrical isolation, and plumbing venting, respectively) and bonding serves to maintain a safe, continuous earth path.