What is the primary purpose of a bonding jumper in an electrical system?

What is the primary purpose of a bonding jumper in an electrical system?

• A. Connects the system to earth ground.
• B. Binds the service panel to the building frame.
• C. Connects conductive parts to maintain equipotential.
• D. Provides a separate grounding electrode.

Answer: (C)

Bonding jumpers create a low-impedance link between metal parts so they stay at the same electrical potential. By tying exposed conductors, enclosures, pipes, and other conductive components together, any fault current has a direct path to trip the protective device and minimizes dangerous voltage differences that could shock someone who touches two different metal surfaces. This is about equipotential bonding among conductive parts, not about connecting the system to earth ground or establishing a separate grounding electrode.

Bonding jumpers create a low-impedance link between metal parts so they stay at the same electrical potential. By tying exposed conductors, enclosures, pipes, and other conductive components together, any fault current has a direct path to trip the protective device and minimizes dangerous voltage differences that could shock someone who touches two different metal surfaces. This is about equipotential bonding among conductive parts, not about connecting the system to earth ground or establishing a separate grounding electrode.