Dual element fuses having adequate current-interrupting capacity shall meet the requirements for short circuit protection of trailing cables as provided in § 75.601, however, the current ratings of such devices shall not exceed the maximum values specified in this section:
| Conductor size (AWG or MGM)
| Single conductor cable
| Two conductor cable
|
|---|
| Ampacity
| Max. fuse rating
| Ampacity
| Max. fuse rating
|
|---|
| 14 | | | 15 | 15
|
| 12 | | | 20 | 20
|
| 10 | | | 25 | 25
|
| 8 | 60 | 60 | 50 | 50
|
| 6 | 85 | 90 | 65 | 70
|
| 4 | 110 | 110 | 90 | 90
|
| 3 | 130 | 150 | 105 | 110
|
| 2 | 150 | 150 | 120 | 125
|
| 1 | 170 | 175 | 140 | 150
|
| 1/0 | 200 | 200 | 170 | 175
|
| 2/0 | 235 | 250 | 195 | 200
|
| 3/0 | 275 | 300 | 225 | 225
|
| 4/0 | 315 | 350 | 260 | 300
|
| 250 | 350 | 350 | 285 | 300
|
| 300 | 395 | 400 | 310 | 350
|
| 350 | 445 | 450 | 335 | 350
|
| 400 | 480 | 500 | 360 | 400
|
| 450 | 515 | 600 | 385 | 400
|
| 500 | 545 | 600 | 415 | 450 |