I posted this question yesterday, I appreciate the response, but I dont think I wrote it out right. Here it is again simplified. I have a 50A receptacle with 60c terminals, and its wired with (THHN) 6 AWG. Take a look at 310.16, under the 60c column its rated for 55A. Now that wire (THHN) is capable of 55A at a operating temperature of 60c at ambient temperature of 86F, right. But what if the ambient temperature was a 100F? I got answers yesterday like, you go ahead and adjust it at the 90c because of the insulation. So do the math, 6 AWG (THHN) in 90c column has an ampacity of 75A, right. Now go to the correction at the bottom of the 90c column and you get .91 as a factor. Math is , 75A x .91 = 68.25A. Okay, that 68.25A is for THHN operating at 90c. What does that have to do with the 60c . Right now everyone thinks thats ok, and its not. See it this way, I have 55A wire, with a 50A receptacle that has 60c terminals, and I increase the ambient temp by 14 degrees to 100F. I only have 5 amps to play with on that wire before I have to change it . But according to the previous math(68.25A), you're way above it. How does that work?