The ampacity of UF cable is determined by conductors rated at what temperature?

The correct answer relates to the ampacity of UF (Underground Feeder) cable being determined by conductors rated at 60° C. Ampacity refers to the maximum amount of electric current a conductor or device can carry before sustaining immediate or progressive deterioration.

In the context of UF cable, the National Electrical Code (NEC) specifies that the ampacity associated with this type of cable is based on a 60° C conductor rating. This is particularly important because cable is often used for residential underground installations, where insulation and heat dissipation must be considered to avoid overheating and potential fire hazards.

While higher temperature ratings may apply to different types of conductors, for UF cable specifically, the 60° C rating governs the calculations for how much current the cable can safely carry. This information is crucial for electricians and other professionals to ensure safe and efficient electrical installations.