Questions: What overcurrent protection condition must be met for Listed FMC to be used as an equipment grounding conductor?

What overcurrent protection condition must be met for Listed FMC to be used as an equipment grounding conductor?
Transcript text: What overcurrent protection condition must be met for Listed FMC to be used as an equipment grounding conductor?
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Solution

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The answer is: The overcurrent protection must not exceed 20 amperes.

Explanation: Flexible Metal Conduit (FMC) can be used as an equipment grounding conductor under certain conditions. According to the National Electrical Code (NEC), specifically NEC 250.118(5), FMC can be used as an equipment grounding conductor if it meets certain criteria. One of these criteria is that the overcurrent protection device (such as a circuit breaker or fuse) must not exceed 20 amperes. This ensures that the conduit can safely carry the fault current without overheating or failing.

Summary: For Listed FMC to be used as an equipment grounding conductor, the overcurrent protection must not exceed 20 amperes.

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