What is the required connection point for the grounding electrode conductor in a separately derived system?

In a separately derived system, the grounding electrode conductor must connect at the system bonding jumper. This connection is crucial because the system bonding jumper serves as a critical point where the grounded and grounding conductors meet. By connecting at this jumper, it ensures that the grounding electrode system effectively grounds the entire electrical system, providing safety and protection against electrical faults.

Typically, a separately derived system could be a transformer or generator that is not connected to the utility's supply. The system bonding jumper is essentially the point of reference for establishing a common ground between the grounding system of the derived source and the grounding electrode system. This arrangement helps address potential differences in voltage and establishes a reliable ground fault path, which is vital for ensuring proper operation of overcurrent devices and minimizing shock hazards.

Consequently, the answer correctly highlights the significance of the system bonding jumper in establishing an effective grounding strategy for separately derived systems.