Code Q&A: Sizing Conductors for Single Motor

Your most pressing National Electrical Code (NEC) questions answered



Q. How do I size the conductors and protection device for a single motor?

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A. Conductors to a single motor must be sized not less than 125% of the motor FLC rating as listed in Table 430.247 [Direct-Current Motors], Table 430.248 [Single-Phase Motors], or Table 430.250 [3-Phase Motors (430.22)].

Let’s run through a simple example problem to show you how t

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