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which column of 310.15 (B)(16)?!

posted Mar 21, 2012 22:32:00 by SarahRaymer1
I am having difficulty figuring out which column to use for my wire sizing. If using THWN-2, which is rated at 90 degrees, would I assume the ampacity in the 90 degree column is proper for sizing? I have come across references that seem to say that you should use the ampacity given in the 75 degree column because you have to consider that the terminal is rated for 75 degrees instead of 90. This is confusing. Which one?
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