Regarding isolated grounding-type receptacles, what is required for proper installation?

The requirement for an insulated equipment grounding conductor in the installation of isolated grounding-type receptacles is crucial for safety and operational integrity. This type of receptacle is designed to reduce electrical noise and enhance the performance of sensitive electronic equipment. The insulated equipment grounding conductor serves several essential purposes.

Firstly, it provides a reliable grounding path that helps to prevent electrical shock hazards by ensuring that all exposed conductive surfaces are properly grounded. This grounding conductor must be insulated to avoid any unintended current leakage to the ground, which could interfere with the function of sensitive devices.

Secondly, this insulated conductor is necessary for creating a low-impedance path back to the source, which is critical for proper circuit operation and ensuring that protective devices function correctly in the event of a fault. A properly installed insulated equipment grounding conductor provides the necessary fault current path that allows circuit breakers or fuses to clear faults promptly, enhancing the safety of the overall electrical system.

In contrast, connecting to the nearest panelboard, the use of a metallic box, or linking to any branch circuit does not meet the specific requirements for isolated grounding-type receptacles and can lead to issues such as interference or unsafe operating conditions.