What is the concept described by bonding to maintain equi-potential across conductive parts?

• A. Equi-potential bonding
• B. Ground fault protection
• C. Arc flash boundary
• D. Lockout/Tagout

Answer: (A)

Equi-potential bonding means connecting all conductive parts that could become energized to a common electrical potential. By bonding enclosures, metal structures, and equipment, any fault current sees a single path and the exposed surfaces stay at essentially the same voltage. This minimizes dangerous voltage differences between surfaces that a person might touch, reducing shock risk in faults, especially in wet or conductive environments. Other options serve different safety roles—detecting ground faults, defining arc-flash boundaries, or isolating equipment for maintenance—but the concept of keeping all conductive parts at the same potential describes equi-potential bonding.