Tables > Conductors > Ampacity > Correction Factors
Correction Factors for Ambient Temperature of Allowable Ampacities of Insulated Conductors

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.
21-2571-771.081.051.041.081.051.04
26-3078-86111111
31-3587-95.91.94.96.91.94.96
36-4096-104.82.88.91.82.88.91
41-45105-113.71.82.87.71.82.87
46-50114-122.58.75.82.58.75.82
51-55123-131.41.67.76.41.67.76
56-60132-140 .58.71 .58.71
61-70141-158 .33.58 .33.58
71-80159-176  .41  .41

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