What does the term "grounded" refer to in electrical systems?

The term "grounded" in electrical systems refers to a connection made to the Earth or a conductive body that extends the ground connection. This means that the electrical system is effectively tied to the ground to ensure safety and stability. Grounding provides a path for electrical current to flow safely into the earth in case of a fault, helping prevent electric shock and equipment damage.

By having a grounding system, it helps to stabilize voltage levels and provide a reference point for the electrical system. This connection to the ground can absorb excess electrical energy, such as lightning strikes or surges, preventing these potentially destructive forces from affecting the electrical devices connected to the system.

In contrast, the other options focus on insulation or isolation techniques, none of which capture the essence of what grounding entails. Grounding is specifically about creating a safe and effective path to the earth, which option B correctly identifies.