UF cable ampacity is based on conductors rated at what temperature?

UF cable ampacity is based on conductors rated at what temperature?

• A. 60°C
• B. 60°F
• C. 75°C
• D. 140°C

Answer: (A)

Ampacity depends on the temperature rating of the conductor insulation. For UF cable, the standard rating used for calculating how much current it can carry is 60°C, so you use the 60°C column in the ampacity tables. You only use a higher rating (75°C) if the conductors themselves are specifically marked as 75°C. Fahrenheit ratings aren’t used for this purpose, and 140°C is not typical for UF cable in residential wiring.

Ampacity depends on the temperature rating of the conductor insulation. For UF cable, the standard rating used for calculating how much current it can carry is 60°C, so you use the 60°C column in the ampacity tables. You only use a higher rating (75°C) if the conductors themselves are specifically marked as 75°C. Fahrenheit ratings aren’t used for this purpose, and 140°C is not typical for UF cable in residential wiring.