Question

What's the ampacity of an 8 THHN conductor when installed in a walk-in cooler (dry location) if the ambient temperature is 50°F?

a. 40A

b. 50A

c. 55A

d. 63A

Answer 1

The ampacity of an 8 THHN conductor in a walk-in cooler at 50°F is 55A.

Step-by-step explanation:

The ampacity of an 8 THHN conductor when installed in a walk-in cooler (dry location) can be determined using the National Electrical Code (NEC) standard. According to NEC, Table 310.15(B)(16), the ampacity of an 8 THHN conductor at 50°F ambient temperature is 55A. So, the correct answer is c. 55A.