What do you call the connection between two or more portions of the equipment grounding conductor?

The connection between two or more portions of the equipment grounding conductor is referred to as a bonding jumper, specifically in the context of equipment. This term denotes the conductor or connection that is utilized to ensure that all parts of the system being grounded are electrically connected, thus maintaining a low-resistance path to ground. This is vital for the effective operation of safety features in electrical systems, such as circuit breakers and fuses, which rely on proper grounding to provide overload protection.

In the case of options that mention "system," "circuit," or "main," they refer to different contexts in which bonding can occur. A bonding jumper as related to "system" would involve connections within a broader system grounding context, while "circuit" would refer to specific circuit configurations rather than the equipment grounding conductor. Meanwhile, "main" typically pertains to the primary service equipment or feeder aspects and does not specifically highlight the connections made between portions of the grounding conductor itself.

By identifying that the equipment is the focus, one can appreciate that the bonding jumper creates necessary connections between separate equipment grounding components to enhance safety and compliance with the NEC.