Oklahoma Electrical Practice Exam

Surge arrestor grounding wires in non-continuous metal raceways must be?

1. Insulated

2. Grounded at one end

3. Bonded at both ends

4. Protected with circuit breakers

The correct answer is: Bonded at both ends

Surge arrestor grounding wires in non-continuous metal raceways must be bonded at both ends to ensure proper grounding and to facilitate the effective operation of the surge protection system. Bonding at both ends helps to maintain a low impedance path for fault currents and transient voltages, ensuring that any surges are efficiently channeled to ground. This is essential for the safety and reliability of electrical systems, as it minimizes the risk of equipment damage or hazardous conditions resulting from voltage surges. Bonding enhances the functionality of surge arrestors by ensuring that they can effectively redirect excessive voltage to ground, protecting downstream equipment. Additionally, it helps in maintaining the integrity of the grounding system and ensures compliance with the National Electrical Code (NEC) requirements, which specify proper bonding methods for grounding electrodes and systems. This is crucial for the overall safety of the electrical installation.