A public utility company is planning to install a new feeder cable. The cable will be routed through a tunnel that has a maximum allowable temperature of 75°C. What is the minimum temperature rating required for the feeder cable, according to Article 330.10(A)?
- A60°C
- B75°C
- C90°C
- 105°C
Exam tip
Always check the code for specific requirements related to cable installation and routing.
Why D is correct
The minimum temperature rating for a feeder cable is determined by the environment in which it will be installed. According to Article 330.10(A), the minimum temperature rating for a cable in a tunnel with a maximum allowable temperature of 75°C is 105°C.