What additional requirement is there for grounding electrodes in a separately derived system besides size?

In a separately derived system, grounding electrodes have specific requirements that ensure safety and compliance with electrical codes. One critical requirement is their connection to the grounding bus. This connection is essential because it provides a path for any fault currents to return safely to ground, which helps protect equipment and reduces the risk of electrical shock.

The grounding bus serves as a common point where the grounding electrodes and other grounding conductors converge, facilitating proper grounding for the entire system. This ensures that all parts of the system maintain the same ground potential, which is crucial for the reliability and safety of the electrical installation.

While factors such as material type, installation location, and weatherproofing are important considerations in grounding practices, they do not specifically address the additional requirement concerning the grounding bus in the context of a separately derived system. Thus, the correct emphasis on the connection to the grounding bus underscores its critical role in ensuring the effectiveness of the grounding system and overall electrical safety.