Full-load amps for three-phase motors at 208 to 575 V with the copper size for each, and typical IEC amps at 400 V. One sheet, fits A4 and US Letter.
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Motor full-load current & cable
NEC 430.250 three-phase FLA · copper size at 125% · IEC 400 V typical amps
tililt.com
NEC 430.250 — three-phase full-load amps, and copper AWG
HP
208 V
230 V
460 V
575 V
Cu 230 V
Cu 460 V
1/2
2.4
2.2
1.1
0.9
14
14
3/4
3.5
3.2
1.6
1.3
14
14
1
4.6
4.2
2.1
1.7
14
14
1-1/2
6.6
6
3
2.4
14
14
2
7.5
6.8
3.4
2.7
14
14
3
10.6
9.6
4.8
3.9
14
14
5
16.7
15.2
7.6
6.1
14
14
7-1/2
24.2
22
11
9
10
14
10
30.8
28
14
11
10
14
15
46.2
42
21
17
6
10
20
59.4
54
27
22
4
10
25
74.8
68
34
27
4
8
30
88
80
40
32
3
8
40
114
104
52
41
1
6
50
143
130
65
52
2/0
4
60
169
154
77
62
3/0
3
75
211
192
96
77
250k
1
100
273
248
124
99
350k
2/0
125
343
312
156
125
2×3/0
3/0
150
396
360
180
144
2×4/0
4/0
200
528
480
240
192
2×350k
350k
250
—
—
302
242
—
500k
300
—
—
361
289
—
2×4/0
350
—
—
414
336
—
2×300k
400
—
—
477
382
—
2×350k
500
—
—
590
472
—
2×500k
Cu = smallest 75 °C copper for the branch circuit at 125%
of the table current (NEC 430.22). 250k = 250 kcmil; 2× = two
conductors in parallel per phase.
IEC — typical amps, 4-pole IE3, 50 Hz
kW
HP
400 V
230 V
0.37
0.5
1
1.7
0.55
0.7
1.4
2.4
0.75
1.0
1.7
2.9
1.1
1.5
2.4
4.2
1.5
2.0
3.3
5.7
2.2
3.0
4.6
8.0
3
4.0
6.2
10.7
4
5.4
8.1
14.0
5.5
7.4
11
19
7.5
10
14.8
26
11
15
21
36
15
20
28.5
49
18.5
25
35
61
22
30
41
71
30
40
55
95
37
50
67
116
45
60
81
140
55
74
99
171
75
101
135
234
90
121
160
277
110
148
195
338
132
177
230
398
160
215
280
485
200
268
350
606
250
335
430
745
315
422
540
935
230 V is the same motor connected in delta. Use these to
choose a starter before the motor is bought; after that, the nameplate
current rules.
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