Current Carrying Capacities of Multicables

Ampacity and De-Rating Tables for Multicable

Ampacity of Listed Extra-Hard Usage Cords and Cables with Temperature Ratings of 75°C (167°F) and 90° (194°F)  From 2002 NEC Table 520-44

 

Size (AWG)
Temperature Rating of
Cords and Cables
Maximum Rating of Overcurrent Devices
75°C (167°F)
90°C (194°F)

14
24
28
15
12
32
35
20
10
41
47
25
8
57
65
35
6
77
87
45
4
101
114
60
2
133
152
80

*Ampacity shown is the ampacity for multiconductor cords and cables where only three copper conductors are current carrying. If the number of current-carrying conductors in a cord or cable exceeds three and the load diversity factor is a minimum 50 percent, the ampacity of each conductor shall be reduced as shown in the following table.

 

De-Rating Table
Number of Conductors
 
Percent of Ampacity Value

4-6
80
7-24
70
25-42
60
43 and above
50

 

This data is for reference purposes only. TMB assumes no responsibility or liability for the accuracy of this data.

 

 

 

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