Electrician's Licensing Practice Exam

What is the proper method to bond multiple disconnects for grounding?

1. Use insulated wire to connect each disconnect

2. Run bare wire from panel to panel with appropriate connectors

3. Connect the disconnects using only aluminum wire

4. Bond with non-conductive materials to enhance safety

The correct answer is: Run bare wire from panel to panel with appropriate connectors

The correct method for bonding multiple disconnects for grounding involves running a bare wire from panel to panel with appropriate connectors. This approach ensures that all disconnects are effectively grounded to the same reference potential, which is critical for safety and electrical performance. Using a bare conductor for bonding provides a low-resistance path for fault currents to safely return to the ground, which is essential for the operation of overcurrent protective devices in the event of a fault. The choice of using appropriate connectors ensures that the connection is secure and can handle the mechanical and thermal stresses that may occur during fault conditions. This method adheres to the National Electrical Code (NEC) requirements, emphasizing the importance of proper grounding and bonding in electrical installations. Other options may not meet safety standards: using insulated wire could impede the effective grounding needed, relying solely on aluminum wire does not address the need for an appropriately grounded path, and using non-conductive materials would prevent the establishment of a necessary conductive connection for fault current.