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
1 Higher circuit-breaker settings may be permitted for special applications when justified.
Table 9—Specifications for Portable Cables Longer Than 500 Feet 1
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
1 Fuses 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%.