Example question in the Electrical Exam Preperation 2014 Theory, Code, and ...

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On Page 182 there is an example question: What is the ampacity of 1/0 XHHW-2 conductors if the ambient tempreture is 108 degrees Farenheit? The answer the book gices is 139 amps and my answer is 147.9. I corrected the ampacity adjustment to .87 due to the temp being 108 dgrees in the 90 degree insulation on B2 A. Am I wrong?
 

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On Page 182 there is an example question: What is the ampacity of 1/0 XHHW-2 conductors if the ambient tempreture is 108 degrees Farenheit? The answer the book gices is 139 amps and my answer is 147.9. I corrected the ampacity adjustment to .87 due to the temp being 108 dgrees in the 90 degree insulation on B2 A. Am I wrong?
You are correct. It appears the author errantly used the correction factor for 75?C (0.82)
 
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