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

• A. To increase voltage
• B. To provide a reliable connection
• C. To enhance insulation
• D. To serve as a conductor

Answer: (B)

The main purpose of a bonding jumper in an electrical system is to provide a reliable connection between different conductive parts, ensuring electrical continuity and safety. When properly installed, a bonding jumper helps eliminate any potential difference in voltage between metallic parts, which could otherwise create a shock hazard. This reliable connection is critical for the effectiveness of grounding systems, as it ensures that any fault current can easily flow back to the ground, tripping the circuit protection devices and preventing accidents.

This function is essential not only for the safety of systems but also for compliance with electrical codes, which set standards for how bonding and grounding are to be achieved in residential and commercial installations.