SC Electrician Practice Questions - South Carolina Electrician Contractor Examination Exam

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A 4 AWG copper THWN conductor (75°C column ampacity 85 A) is installed in a rooftop raceway where the ambient temperature is 42°C. Using Table 310.15(B)(1), what is the corrected ampacity?

69.7 A 74.8 A 85.0 A 59.5 A

Correct Answer:

69.7 A

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