What distinguishes the Supply-Side bonding jumper in an electrical installation?

The distinguishing feature of the Supply-Side bonding jumper lies in its role within the service equipment enclosure, which is critical for maintaining electrical continuity. This connection ensures that all metal parts within the service equipment are effectively bonded together, helping to prevent any potential differences in voltage that could be dangerous. By continuing this bonding throughout the service equipment, it enhances the safety of the electrical system by allowing fault currents to return safely to the ground, which in turn ensures that overcurrent protection devices operate correctly during a fault.

Other choices do not encapsulate the fundamental purpose of the Supply-Side bonding jumper. While it is indeed installed at the service entrance, its function extends beyond just this point. The bonding jumper is not limited to lighting circuits; it applies to the entire service equipment. Lastly, it is incorrect to say that it is typically connected to the ground only, as its primary role is to create continuity within the system rather than functioning solely as a ground connection. Understanding this role is crucial for ensuring safe electrical installations.