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In the context of bonding, it is essential to understand the requirements outlined by the National Electrical Code (NEC). A key requirement for effective bonding is that it ensures a physical connection between metallic parts, allowing for a pathway for fault currents and reducing the risk of shock or fire.

The correct choice reflects a misconception about bonding requirements. It is not necessary for the bonded parts to be in the same circuit. Bonding is primarily concerned with creating a low-resistance path that can safely carry fault currents, regardless of whether the components are part of the same circuit. This is crucial for the system's overall safety and functionality, ensuring that any fault can be effectively managed and that all metallic parts are at the same potential to reduce electrical hazards.

Moreover, the other requirements like having a physical connection and the capability to carry fault currents are integral to effective bonding practices that promote safety in electrical systems. These requirements ensure that equipment operates safely, maintaining system integrity, and preventing electrical faults from causing harm. Therefore, the misunderstanding regarding the necessity of the same circuit in bonding underscores the importance of recognizing proper bonding practices in electrical installations.