Electrician Red Seal · Question
In a solidly grounded system, what is the purpose of bonding the non-current-carrying metal parts of electrical equipment together?
Bonding creates a low-impedance path for fault current to flow back to the source, which ensures that the overcurrent device (breaker or fuse) operates quickly
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Question: In a solidly grounded system, what is the purpose of bonding the non-current-carrying metal parts of electrical equipment together?
Answer options:
- To provide a path for lightning strikes. ✅ To create an equipotential plane and facilitate the operation of the overcurrent device.
- To reduce electromagnetic interference.
- To provide a neutral reference point.
Correct answer: To create an equipotential plane and facilitate the operation of the overcurrent device.
Explanation: Bonding creates a low-impedance path for fault current to flow back to the source, which ensures that the overcurrent device (breaker or fuse) operates quickly to clear the fault. This also creates an equipotential plane, minimizing dangerous touch voltages.
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