Tables > Conductors > Ampacity > Correction Factors

	Correction Factors Ambient Temp. (degrees Celsius) Ambient Temp. (degrees Fahrenheit) For ambient temperatures other than 30 degrees Celsius (86 degrees Fahrenheit), multiply the allowable ampacities by the appropriate factor shown below. 21-25 71-77 1.08 1.05 1.04 1.08 1.05 1.04 26-30 78-86 1 1 1 1 1 1 31-35 87-95 .91 .94 .96 .91 .94 .96 36-40 96-104 .82 .88 .91 .82 .88 .91 41-45 105-113 .71 .82 .87 .71 .82 .87 46-50 114-122 .58 .75 .82 .58 .75 .82 51-55 123-131 .41 .67 .76 .41 .67 .76 56-60 132-140   .58 .71   .58 .71 61-70 141-158   .33 .58   .33 .58 71-80 159-176     .41     .41
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See also Calculations Determine the Transformer Fault Factor Determine the Transformer Fault Factor Tables Correcting existing power-factor to desired power-factor Definitions Power - A-C Circuits Power Factor