In Figure 303.05, the equipment grounding conductor is shown at Point:

The equipment grounding conductor plays a crucial role in ensuring safety in electrical systems. Point III in the diagram, where the grounding conductor is indicated, typically represents a connection that serves as a safe path for fault currents to ground. This is essential in protecting both equipment and individuals from electric shocks and electrical faults.

In grounding systems, the design and placement of the grounding conductor must meet specific standards and codes to ensure they are effective. Point III would likely be where the grounding conductor is properly connected to a grounding electrode or grounding system, providing a direct route for any fault current to dissipate safely into the earth. This ensures that any overload or fault conditions do not pose a risk of electric shock or fire.

Other points in the diagram may involve other components or conductors that are not specifically designated for grounding purposes, thus making Point III the most suitable choice for identifying the equipment grounding conductor. Understanding the arrangement of grounding systems is fundamental in electrical work, as it directly impacts electrical safety practices.