| 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 |
|
|
|