LIST OF TABLES
| Table No. | Title |
|---|---|
| 1 | Portable power cable ampacities—600 volts. |
| 2 | Portable cord ampacities—600 volts. |
| 3 | Portable power cable ampacities—601 to 5,000 volts. |
| 4 | Normal diameter of round cables with tolerances in inches—600 volts. |
| 5 | Nominal dimension of flat cables with tolerances in inches—600 volts. |
| 6 | Nominal diameter of heavy jacketed cords with tolerances in inches—600 volts. |
| 7 | Nominal diameter of three-conductor portable power cables with tolerances in inches—601 to 5,000 volts. |
| 8 | Fuse ratings or instantaneous settings of circuit breakers for short-circuit protection of portable cables. |
| 9 | Specifications for portable cables longer than 500 feet. |
| 10 | High voltage trailing cable ampacities and outside diameters. |
Table 1—Portable Power Cable Ampacities—600 Volts (Amperes Per Conductor Based on 60 °C. Copper Temperature—40 °C. Ambient)
| Conductor size—AWG or MCM | Single conductor | 2-conductor, round or flat | 3-conductor, round or flat | 4-conductor | 5-conductor | 6-conductor |
|---|---|---|---|---|---|---|
| 8 | 45 | 40 | 35 | 30 | 25 | 20 |
| 6 | 60 | 50 | 50 | 40 | 35 | 30 |
| 4 | 85 | 70 | 65 | 55 | 45 | 35 |
| 3 | 95 | 80 | 75 | 65 | 55 | 45 |
| 2 | 110 | 95 | 90 | 75 | 65 | 55 |
| 1 | 130 | 110 | 100 | 85 | 75 | 65 |
| 1/0 | 150 | 130 | 120 | 100 | 90 | 80 |
| 2/0 | 175 | 150 | 135 | 115 | 105 | 95 |
| 3/0 | 205 | 175 | 155 | 130 | 120 | 110 |
| 4/0 | 235 | 200 | 180 | 150 | 140 | 130 |
| 250 | 275 | 220 | 200 | 160 | ||
| 300 | 305 | 240 | 220 | 175 | ||
| 350 | 345 | 240 | 235 | 190 | ||
| 400 | 375 | 280 | 250 | 200 | ||
| 450 | 400 | 300 | 270 | 215 | ||
| 500 | 425 | 320 | 290 | 230 |
Table 2—Portable Cord Ampacities—600 Volts (Amperes Per Conductor Based on 60 °C. Copper Temperature—40 °C. Ambient)
| Conductor size—AWG | 1-3 conductor | 4-6 conductor | 7-9 conductor |
|---|---|---|---|
| 14 | 15 | 12 | 8 |
| 12 | 20 | 16 | 11 |
| 10 | 25 | 20 | 14 |
Table 3—Portable Power Cable Ampacities—601 to 5,000 Volts (Amperes Per Conductor Based on 75 °C. Copper Temperature—40 °C. Ambient)
| Conductor size—AWG or MCM | 3-conductor types G-GC and SIIC-GC 2,000 volts | 3-conductor type SHD-GC 2,001-5,000 volts |
|---|---|---|
| 6 | 65 | 65 |
| 4 | 85 | 85 |
| 3 | 100 | 100 |
| 2 | 115 | 115 |
| 1 | 130 | 130 |
| 1/0 | 145 | 145 |
| 2/0 | 170 | 170 |
| 3/0 | 195 | 195 |
| 4/0 | 220 | 220 |
| 250 | 245 | 245 |
| 300 | 275 | 275 |
| 350 | 305 | 305 |
Table 4—Nominal Diameters of Round Cables With Tolerances in Inches—600 Volts
| Conductor size—AWG or MCM | Single conductor | 2-conductor | 3-conductor | 4-conductor—Types W & G | 5-conductor—Types W & G | 6-conductor | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Types W & G twisted | Type PG, 2 power | Type PCG, 3 power, ground | Types W & G | Type PG, 3 power, ground | Type PCG, 3 power, 2 control, ground | Type w | Tolerance | ||||
| 8 | 0.44 | 0.81 | 0.84 | 0.94 | 0.91 | 0.93 | 1.03 | 0.99 | 1.07 | 1.18 | ±0.03 |
| 6 | .51 | .93 | .93 | .98 | 1.01 | 1.03 | 1.18 | 1.10 | 1.21 | 1.31 | ±.03 |
| 4 | .57 | 1.08 | 1.08 | 1.10 | 1.17 | 1.20 | 1.29 | 1.27 | 1.40 | 1.52 | ±.03 |
| 3 | .63 | 1.17 | 1.17 | 1.20 | 1.24 | 1.27 | 1.31 | 1.34 | 1.48 | 1.61 | ±.03 |
| 2 | .66 | 1.27 | 1.27 | 1.29 | 1.34 | 1.34 | 1.39 | 1.48 | 1.61 | 1.75 | ±.03 |
| 1 | .74 | 1.44 | 1.44 | 1.44 | 1.51 | 1.52 | 1.52 | 1.68 | 1.88 | 2.05 | ±.03 |
| 1/0 | .77 | 1.52 | 1.52 | 1.52 | 1.65 | 1.68 | 1.68 | 1.79 | 1.96 | 2.13 | ±.04 |
| 2/0 | .82 | 1.65 | 1.65 | 1.65 | 1.75 | 1.79 | 1.79 | 1.93 | 2.13 | 2.32 | ±.04 |
| 3/0 | .87 | 1.77 | 1.77 | 1.77 | 1.89 | 1.93 | 1.93 | 2.07 | 2.26 | 2.49 | ±.05 |
| 4/0 | .93 | 1.92 | 1.92 | 1.92 | 2.04 | 2.13 | 2.13 | 2.26 | 2.46 | 2.71 | ±.05 |
| 250 | 1.03 | 2.16 | 2.16 | 2.16 | 2.39 | 2.39 | 2.39 | 2.66 | ±.06 | ||
| 300 | 1.09 | 2.32 | 2.56 | 2.84 | ±.06 | ||||||
| 350 | 1.15 | 2.43 | 2.68 | 2.98 | ±.06 | ||||||
| 400 | 1.20 | 2.57 | 2.82 | 3.14 | ±.06 | ||||||
| 450 | 1.26 | 2.67 | 2.94 | 3.26 | ±.06 | ||||||
| 500 | 1.31 | 2.76 | 3.03 | 3.40 | ±.06 | ||||||
Table 5—Nominal Dimensions of Flat Cables With Tolerances in Inches—600 Volts
| Conductor size—AWG | 2-conductor | 3-conductor—Type G | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type W | Type G | Major | Minor | |||||||||
| Major | Minor | Major | Minor | O.D. | Tolerance | O.D. | Tolerance | |||||
| O.D. | Tolerance | O.D. | Tolerance | O.D. | Tolerance | O.D. | Tolerance | |||||
| 8 | 0.84 | ±0.04 | 0.51 | ±0.03 | ||||||||
| 6 | .93 | ±.04 | .56 | ±.03 | 1.02 | ±.04 | 0.56 | ±.03 | 1.65 | ±0.06 | 0.67 | ±0.05 |
| 4 | 1.05 | ±.04 | .61 | ±.03 | 1.15 | ±.04 | .61 | ±.03 | 1.85 | ±.06 | .75 | ±.05 |
| 3 | 1.14 | ±.04 | .68 | ±.03 | 1.26 | ±.04 | .68 | ±.03 | 1.99 | ±.06 | .77 | ±.05 |
| 2 | 1.24 | ±.04 | .73 | ±.03 | 1.35 | ±.04 | .73 | ±.06 | 2.10 | ±.06 | .81 | ±.05 |
| 1 | 1.40 | ±.04 | .81 | ±.03 | 1.55 | ±.04 | .81 | ±.03 | 2.43 | ±.06 | .97 | ±.05 |
| 1/0 | 1.51 | ±.04 | .93 | ±.03 | 1.67 | ±.04 | .93 | ±.03 | ||||
| 2/0 | 1.63 | ±.04 | .99 | ±.03 | 1.85 | ±.04 | .99 | ±.03 | ||||
| 3/0 | 1.77 | ±.04 | 1.03 | ±.03 | 2.00 | ±.04 | 1.03 | ±.03 | ||||
| 4/0 | 1.89 | ±.04 | 1.10 | ±.03 | 2.10 | ±.04 | 1.10 | ±.03 | ||||
Table 6—Nominal Diameters of Heavy Jacketed Cords With Tolerances In Inches—600 Volts
| Conductor size—AWG | 2-conductor | 3-conductor | 4-conductor | 5-conductor | 6-conductor | 7-conductor | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diameter | Tolerance | Diameter | Tolerance | Diameter | Tolerance | Diameter | Tolerance | Diameter | Tolerance | Diameter | Tolerance | |
| 14 | 0.64 | ±0.02 | 0.67 | ±0.02 | 0.71 | ±0.02 | 0.78 | ±0.03 | 0.83 | ±0.03 | 0.89 | ±0.03 |
| 12 | .68 | ±.02 | .72 | ±.03 | .76 | ±.03 | .83 | ±.03 | .89 | ±.03 | .98 | ±.03 |
| 10 | .73 | ±.03 | .80 | ±.03 | .84 | ±.03 | .90 | ±.03 | 1.00 | ±.03 | 1.07 | ±.03 |
Table 7—Nominal Diameters of Three-Conductor Portable Power Cables With Tolerances in Inches—601 to 5,000 Volts
| Conductor size—AWG or MCM | Type G-GC (nonshielded) 2,000 volts | Type SHC-GC (shielded overall) 2,000 volts | Type SHD-GC (individually shielded power conductors) 2,001-3,000 volts | Type SHD-GC (individually shielded power conductors) 3,001-5,000 volts | ||||
|---|---|---|---|---|---|---|---|---|
| Diameter | Tolerance | Diameter | Tolerance | Diameter | Tolerance | Diameter | Tolerance | |
| 6 | 1.25 | + 0.10, −0.06 | 1.39 | + 0.11, −0.07 | 1.62 | + 0.13, −0.08 | 1.78 | + 0.14, −0.09 |
| 4 | 1.40 | + .11, −.07 | 1.55 | + .12, −.08 | 1.77 | + .14, −.09 | 1.90 | + .15, −.10 |
| 3 | 1.48 | + .12, −.07 | 1.62 | + .13, −.08 | 1.84 | + .15, −.09 | 1.98 | + .16, −.10 |
| 2 | 1.55 | + .12, −.08 | 1.71 | + .14, −.09 | 1.92 | + .15, −.10 | 2.09 | + .17, −.11 |
| 1 | 1.74 | + .14, −.09 | 1.89 | + .15, −.09 | 2.04 | + .16, −.10 | 2.18 | + .17, −.11 |
| 1/0 | 1.84 | + .15, −.09 | 2.02 | + .16, −.10 | 2.18 | + .17, −.11 | 2.34 | + .19, −.12 |
| 2/0 | 1.99 | + .16, −.10 | 2.16 | + .17, −.11 | 2.29 | + .18, −.12 | 2.46 | + .20, −.12 |
| 3/0 | 2.12 | + .17, −.11 | 2.30 | + .18, −.11 | 2.45 | + .20, −.12 | 2.62 | + .21, −.13 |
| 4/0 | 2.30 | + .18, −.12 | 2.48 | + .20, −.12 | 2.62 | + .21, −.13 | 2.76 | + .22, −.14 |
| 250 | 2.46 | + .20, −.12 | 2.70 | + .22, −.13 | ||||
| 300 | 2.63 | + .21, −.13 | 2.84 | + .23, −.14 | ||||
| 350 | 2.75 | + .22, −.14 | 2.97 | + .24, −.15 | ||||
Table 8—Fuse Ratings or Instantaneous Setting of Circuit Breakers for Short-Circuit Protection of Portable Cables and Cords
| Conductor size—AWG or MCM | Ohms/1,000 ft. at 25 °C. | Maximum allowable fuse rating (amperes) | Maximum allowable circuit breaker instantaneous setting (amperes)1 |
|---|---|---|---|
| 14 | 2.62 | 20 | 50 |
| 12 | 1.65 | 30 | 75 |
| 10 | 1.04 | 40 | 150 |
| 8 | .654 | 80 | 200 |
| 6 | .410 | 100 | 300 |
| 4 | .259 | 200 | 500 |
| 3 | .205 | 250 | 600 |
| 2 | .162 | 300 | 800 |
| 1 | .129 | 375 | 1,000 |
| 1/0 | .102 | 500 | 1,250 |
| 2/0 | .081 | 1,500 | |
| 3/0 | .064 | 2,000 | |
| 4/0 | .051 | 2,500 | |
| 250 | .043 | 2,500 | |
| 300 | .036 | 2,500 | |
| 350 | .031 | 2,500 | |
| 400 | .027 | 2,500 | |
| 450 | .024 | 2,500 | |
| 500 | .022 | 2,500 |
1Higher circuit-breaker settings may be permitted for special applications when justified.
Table 9—Specifications for Portable Cables Longer Than 500 Feet1
| Conductor size—AWG or MCM | Max. allowable length (feet) | Normal ampacity at 60 °C. copper temperature (40 °C. ambient) | Resistance at 60 °C. copper temperature (ohms) |
|---|---|---|---|
| 6 | 550 | 50 | 0.512 |
| 4 | 600 | 70 | .353 |
| 3 | 650 | 80 | .302 |
| 2 | 700 | 95 | .258 |
| 1 | 750 | 110 | .220 |
| 1/0 | 800 | 130 | .185 |
| 2/0 | 850 | 150 | .157 |
| 3/0 | 900 | 175 | .130 |
| 4/0 | 1,000 | 200 | .116 |
| 250 | 1,000 | 220 | .098 |
| 300 | 1,000 | 240 | .082 |
| 350 | 1,000 | 260 | .070 |
| 400 | 1,000 | 280 | .061 |
| 450 | 1,000 | 300 | .054 |
| 500 | 1,000 | 320 | .050 |
1Fuses shall not be used for short-circuit protection of these cables. Circuit breakers shall be used with the instantaneous trip settings not to exceed the values given in Table 8.
Table 10—High Voltage Trailing Cable Ampacities and Outside Diameters
| Power conductor | Ampacity* | Outside diameter** (inches) |
||
|---|---|---|---|---|
| Size AWG or kcmil | Amperes per conductor | SHD-GC 2001 to 5000 volts | SHD-CGC 2001 to 5000 volts | SHD-PCG 2001 to 5000 volts |
| 6 | 93 | 1.56 | 1.62 | |
| 4 | 122 | 1.68 | 1.73 | |
| 3 | 140 | 1.78 | 1.82 | 1.94 |
| 2 | 159 | 1.87 | 1.91 | 2.03 |
| 1 | 184 | 1.95 | 1.98 | 2.12 |
| 1/0 | 211 | 2.08 | 2.10 | 2.26 |
| 2/0 | 243 | 2.20 | 2.20 | 2.40 |
| 3/0 | 279 | 2.36 | 2.36 | 2.58 |
| 4/0 | 321 | 2.50 | 2.50 | 2.76 |
| 250 | 355 | 2.69 | 2.69 | |
| 300 | 398 | 2.81 | 2.81 | |
| 350 | 435 | 2.95 | 2.95 | |
| 500 | 536 | 3.31 | 3.31 | |
*These ampacities are based on single isolated conductor in air, operated with open-circuited shield for a 90 °C conductor temperature and an ambient temperature of 40 °C.
**Tolerances for the outside diameter are + 8%/−5%.
[33 FR 4660, Mar. 19, 1968; 33 FR 6345, Apr. 26, 1968, as amended at 42 FR 8373, Feb. 10, 1977; 75 FR 17549, Apr. 6, 2010; 75 FR 20918, Apr. 22, 2010]
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