Electrician Red Seal · Question
What is the primary function of the bonding screw provided in a main service panel?
At the main service entrance, the bonding screw is installed to create a solid connection between the neutral (grounded circuit conductor) bar and the panel enc
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Question: What is the primary function of the bonding screw provided in a main service panel?
Answer options:
- To secure the neutral bar to the enclosure ✅ To connect the equipment grounding conductor to the neutral
- To bond the panel enclosure to the grounding electrode
- To provide a termination point for branch circuit grounds
Correct answer: To connect the equipment grounding conductor to the neutral
Explanation: At the main service entrance, the bonding screw is installed to create a solid connection between the neutral (grounded circuit conductor) bar and the panel enclosure. This establishes the system ground and ensures a low-impedance path for fault current to return to the source.
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