If the ambient temperature anywhere along the length of a raceway is less than 78 degrees F or higher than degrees F, the ampacity of the conductors in the raceway, or cable, must be modified by a correction factor.

Question

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The National Electrical Code (NEC) specifies that the ampacity of conductors must be adjusted if the ambient temperature is above 86 degrees Fahrenheit.

If the Ambient Temperature Anywhere Along the Length of a Raceway