The conductor shown at Point C is a(n) ___.

In electrical systems, the main bonding jumper serves a critical function in establishing a connection between the ground and the neutral conductor at the service equipment, which helps maintain safety by ensuring that both systems are effectively bonded together. This bonding relationship is essential for preventing potential differences that could lead to shock hazards or equipment malfunction.

The absence of proper bonding between these systems can lead to voltage rise and could result in dangerous conditions. The main bonding jumper provides a path for ground fault current, which allows overcurrent protective devices, like circuit breakers, to act quickly to interrupt the flow of electricity under fault conditions. This enhances the overall reliability and safety of the electrical installation.

Understanding the role of the main bonding jumper is key in ensuring that electrical systems comply with the National Electrical Code (NEC) and are designed to protect people and property. Recognizing its importance will assist you in various aspects of electrical work, particularly when it comes to wiring methods and grounding techniques.