What is the purpose of a grounding electrode system?

• A. To isolate the electrical system from earth to prevent grounding.
• B. To connect the electrical system to earth to provide a path for fault currents and stabilize voltage.
• C. To regulate voltage to a constant level.
• D. To increase the system's fault current.

Answer: (B)

Grounding electrode systems provide a low-impedance path to earth and establish a common reference point for the electrical system. This setup ensures that if a fault occurs, current has a return path to the source through the earth, which helps protective devices detect the fault and trip quickly. It also helps keep voltages near earth potential during normal operation, reducing dangerous stray voltages and improving safety for people and equipment.

So, the purpose is to connect the electrical system to earth to provide a path for fault currents and stabilize voltage. It’s not about isolating the system from earth, regulating voltage by itself, or increasing fault current.