Zap Through NEC Article 100 Practice Test 2025 – Energize Your Electrical Expertise!

The connection between the grounded circuit conductor and the equipment grounding conductor at the service is referred to as a "Bonding Jumper, Main." This is a crucial aspect of electrical systems as it establishes a low-resistance path for fault currents and ensures that any fault that occurs will trip the protection devices, providing safety to users and equipment.

At the service entrance, the main bonding jumper connects the grounded conductor, which carries return current under normal operation, to the grounding conductor that connects to the earth. This bond is essential because it ensures that the grounding system will operate effectively, reducing the risk of electric shock or fire from faults.

In this context, other options do not accurately describe this connection. The term "Equipment" typically pertains to grounding conductors related to specific devices rather than the main service connection. "System" suggests a broader interpretation which does not pinpoint the specific connection at the service. Lastly, "Circuit" implies a connection that might involve branch circuits but does not describe the main bonding connection at the service. Thus, "Bonding Jumper, Main" correctly identifies the specific relationship and function in maintaining safety and performance within electrical systems.