If a conductive part is connected to ground or to a conductive body that extends a ground connection, what is this condition called?

The condition described in the question – where a conductive part is connected to ground or to another conductive body that extends a ground connection – is known as "grounded." This term refers to the situation in which electrical systems are connected to the earth or a conductive body that serves as an electrical reference point, effectively providing a path for fault currents. Grounding is essential for safety, as it helps prevent electric shock and equipment damage by ensuring that excess electricity can safely dissipate into the ground.

When a conductive element is grounded, it reduces the risk of dangerous voltage buildup during fault conditions. This foundational principle is crucial in electrical safety and is extensively outlined in standards and codes that govern electrical installations.

In contrast, the other options describe different conditions: bonding refers to connecting two or more conductive bodies together to ensure that they have the same electrical potential, which is crucial for preventing electrical shock; isolation refers to a state where a conductive part is electrically separated and not connected to the ground or other conductive materials; and "live" indicates a state where a conductor carries electrical current. These distinctions highlight the importance of proper terminology in electrical safety and practices.