A grounding scheme is represented by a schematic of what configuration?

The representation of a grounding scheme by a schematic of ground cables from each phase to a common ground highlights the concept of ensuring that all phases of a system are referenced to a single, shared ground point. This configuration is essential to provide a low impedance path for fault currents, thus ensuring the safety and stability of the electrical system. In practical terms, it helps prevent voltage fluctuations that can harm equipment and creates a uniform reference point that minimizes the risk of electrical shock or equipment failure due to ground potential rise.

This approach is fundamental in many electrical installations, particularly in industrial and commercial environments where multiple phases are in use. By linking each phase to a common ground, it ensures that any fault in the system is immediately directed to that grounding point, allowing protective devices to operate correctly.

In contrast, the other configurations represent different grounding strategies that may not offer the same advantages for every scenario. For example, a single ground connection might not adequately address the potential for ground loops or voltage differentials between phases. Isolated grounding focuses on limiting ground interference, which may not be suitable for systems that require a strong grounding connection for safety. Multi-point ground isolation can introduce complexities that may not be necessary or beneficial in all systems.