ND Electrician Practice Questions - North Dakota Journeyman Electrician License Exam

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North Dakota's cold climate affects electrical installations. Per NEC 310.15(B)(2), conductor ampacity adjustment for ambient temperature applies when the temperature differs from what standard value?

20°C (68°F) 25°C (77°F) 30°C (86°F) 40°C (104°F)

Correct Answer:

30°C (86°F)

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