NEC Table 400.5(A)(1) for Flexible Cords and Flexible Cables: Cram for Exam Vol. 4 Question 52

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akyip

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Hey guys,

I'm working on code questions from Cram for Exam Vol. 4. Question 52 is about allowable ampacity for type ETT flexible cord:

"A #8 AWG, two-conductor flexible cord type ETT is to be used in a construction atmosphere. What is the allowable ampacity of the cord?"

The solution says that the answer is choice C = 35 A based on Table 400.5(A)(1), but upon looking more carefully at this table, shouldn't it be 40 A instead?

The 35 A for type ETT #8 AWG flexible cord is listed under Column A, which per the notes below the table apply to 3-conductor cords.

On the other hand, Column B for ETT #8 AWG flexible cord has 40 A under Column B, which per the notes below the table apply to 2-conductor cords. And the given flexible cord in the problem statement is 2-conductor.

See the attached photos for reference. So, shouldn't the correct answer be Choice D = 40 A instead? Or am I missing something here?

Cram for Exam Vol 4 Problem 52.jpg

Cram for Exam Vol 4 Solution 52.jpg

NEC Table 400.5(A)(1).jpg

 
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