430.245
ARTICLE 440 — MOTORS. MOTOR CIRCUITS. AND CONTROLLERS
Table 430.250 Full-Load Current, Three-Phase Alternating-Current Motors
The following values of full-load currents are typical for motors running at speeds usual for belted motors and motors with normal torque
characteristics.
The voltages listed are rated motor voltages. The currents listed shall be permitted for system voltage ranges of 110 to 120, 220 to 240, 440
to 480, and 550 to 600 volts.
Synchronous-Type Unity Power
Factor* (Amperes)
Induction-Type Squirrel Cage and Wound Rotor (Amperes)
Horsepower
115
200
208
230
460
575
2300
230
460
575
2300
Volts
Volts
Volts
Volts
Volts
Volts
Volts
Volts
Volts
Volts
Volts
4.4
2.5
2.4
2.2
1.1
0.9
1.6
1.3
Vl
Va
3.7
3.5
1
6.4
8.4
3.2
4.8
4.6
4.2
2.1
1.7
l'/2
12.0
6.9
6.6
13.6
7.8
7.5
6.0
6.8
3.0
3.4
2.4
2
11.0
10.6
4.8
3.9
7.6
6.1
3
—
5
—
7'/2
—
17.5
16.7
9.6
15.2
25.3
24.2
22
11
9
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
32.2
30.8
28
14
11
46.2
42
21
62.1
78.2
59.4
27
74.8
54
68
17
22
34
92
88
80
40
27
32
120
114
104
52
41
50
60
150
143
130
52
177
169
154
65
77
62
16
75
100
221
211
192
77
285
273
343
396
528
248
312
96
124
360
480
_
15
20
25
—
—
—
30
40
—
125
359
150
414
200
552
250
300
—
—
—
—
350
—
—
—
—
400
—
—
—
—
450
—
—
—
—
—
—
—
—
500
—
—
48.3
10
♦For
2.7
—
—
21
63
26
32
26
83
41
33
104
52
42
123
61
49
20
155
78
62
15
99
26
202
101
81
20
156
125
126
101
144
302
151
121
240
192
31
37
49
253
180
400
201
161
25
30
40
302
242
60
361
414
289
336
72
477
382
95
515
412
103
590
472
118
53
—
—
—
83
—
—
—
—
12
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
90 and 80 percent power factor, the figures shall be multiplied by 1.1 and 1.25, respectively.
Table 430.251(A) Conversion Table of Single-Phase LockedRotor Currents for Selection of Disconnecting Means and
Controllers as Determined from Horsepower and Voltage
Rating
For use only with 430.110, 440.12, 440.41, and 455.8(C).
Maximum Locked-Rotor Current in
Amperes, Single Phase
Rated
Horsepower
'/2
3/4
115 Volts
58.8
82.8
1
96
l'/2
2
120
144
3
204
5
7'/2
336
480
10
600
70-338
208 Volts
230 Volts
32.5
29.4
45.8
41.4
53
66
48
60
80
72
113
186
102
265
332
240
168
300
NATIONAL ELECTRICALCODE
2011 Edition
ARTICLE 430 — MOTORS, MOTOR CIRCUITS, AND CONTROLLERS
Table 430.248 Full-Load Currents in Amperes, Single-Phase
Alternating-Current Motors
The following values of full-load currents are for motors running at
usual speedsand motors with normal torque characteristics. The volt
ages listed are rated motor voltages. The currents listed shall be per
mitted for system voltage ranges of 110 to 120 and 220 to 240 volts.
115
Horsepower
Volts
200
Volts
208
Volts
230
Volts
2.4
2.2
3.2
2.9
3.6
'/6
4.4
Va
5.8
2.5
3.3
lA
7.2
4.1
Vi
9.8
5.6
4.0
5.4
7.9
9.2
7.6
8.8
20
11.5
11.0
24
13.8
13.2
18.7
30.8
44.0
55.0
Va
1
l'/2
2
3
5
V/l
10
13.8
16
34
56
80
100
19.6
32.2
46.0
57.5
4.9
6.9
8.0
10
12
17
28
40
50
Table 430.249 Full-Load Current, Two-Phase
Alternating-Current Motors (4-Wire)
The following values offull-load current are for motors running atspeeds
usual for belted motors and motors with normal torque characteristics.
Current in the common conductor of a 2-phase, 3-wire system will be
1.41 times the value given. The voltages listed arerated motor voltages.
Thecurrents listed shall be permitted for system voltage ranges of 110 to
120, 220 to 240, 440 to 480, and 550 to 600 volts.
Induction-Type Squirrel Cage and
Wound Rotor (Amperes)
115
Horsepower
Volts
460
575
2300
Volts
Volts
Volts
Vi
4.0
2.0
1.0
0.8
4.8
2.4
1.2
1.0
—
• 1
6.4
3.2
1.6
1.3
—
l'/2
9.0
11.8
4.5
2.3
5.9
8.3
13.2
3.0
1.8
2.4
6.6
3.3
5.3
19
9.0
8.0
2
3
5
7'/2
15
20
25
30
40
50
60
75
100
125
150
200
NATIONAL ELECTRICAL CODE
230
Volts
Va
—
—
—
10
2011 E^l ltion
430.245
—
4.2
—
—
—
—
—
24
12
10
36
18
14
—
_
—
47
23
19
—
—
59
29
24
—
—
69
35
28
—
90
45
36
—
—
—
—
—
—
—
—
113
56
45
133
166
67
53
66
14
83
218
270
109
87
23
135
108
28
312
156
125
32
416
208
167
43
_
18
70-337