On isolated ground receptacles, is the metal yoke bonded to the equipment grounding terminal?

On isolated ground receptacles, the metal yoke is not bonded to the equipment grounding terminal. This design is intentional to provide a reduced path for ground noise, which can enhance the performance of sensitive electronic equipment. An isolated ground receptacle connects to a separate grounding system, which helps in minimizing electromagnetic interference that can affect equipment operation.

The purpose of this approach is to ensure that any ground noise that might be present on the normal grounding path does not affect the isolated ground, thus maintaining the integrity of the power supply to sensitive devices. This selective disconnection of the yoke from the equipment grounding terminal is crucial in environments where electrical noise might interfere with the operation of sensitive electronic equipment.

In contrast, other options may suggest conditions under which bonding occurs, but the nature of isolated ground receptacles explicitly defines that the yoke remains unbonded to ensure optimal equipment performance.