Which of the following must be connected to an insulated copper equipment grounding conductor in wiring methods?

The correct answer indicates that all specified components must be connected to an insulated copper equipment grounding conductor. This is necessary to ensure safety and prevent electrical faults across the entire system.

Connecting the electrical panel, patient care equipment, and all other circuit conductors to the grounding conductor establishes a comprehensive earth connection, which is crucial for clearing faults and minimizing the risk of shock or fire. The grounding system provides a pathway for fault currents to safely return to the ground.

By including the electrical panel, the system ensures that the source of power is also grounded, which helps to protect the connected circuits. Patient care equipment, often used in sensitive environments like healthcare settings, requires grounding to maintain equipment safety and reliability. Finally, connecting all other circuit conductors enables the entire electrical system to effectively dissipate fault currents. This holistic approach to grounding enhances the safety and integrity of the electrical system.