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G14
Siemens Energy & Automation, Inc. 1000 McKee Street Batavia, Illinois 60510
SFIM-7002A-0901
Section G, September, 2001
Approximate AC Motor Amps
Use only When Motor Full Load Current is Not Known
Motor Amps will vary depending on the type and manufac-
ture of the motor. These average values, usually for T frame
motors with service factor of 1.15 are to be used only as a
guide. The formulas on the previous page may be used to
obtain approximate amps for other motors.
NOTE:
Actual Motor Amps may be higher or lower than the values
listed below for a particular motor. For more reliable motor
protection, NEC requires selection of heater elements by
using the motor nameplate data. Motor nameplate data must
be checked to determine proper size of heater coil before
motor is energized.
3 Phase
200V
208V
230V
380V
415V
460V
575V
KW
HP
FLA
FLA
FLA
(50Hz)FLA
(50Hz)FLA
FLA
FLA
–
0.25(¼)
–
1.39
1.2
–
–
0.6
0.84
–
0.33(
1/3
)
–
1.69
1.46
–
–
0.73
0.58
0.37
0.5
2.5
2.4
2
1.3
.81
1.1
.9
0.55
0.75
3.7
3.5
3.2
1.8
1.21
1.6
1.3
0.75
1
4.8
4.6
4.2
2.3
2
2.1
1.7
1.1
1.5
6.9
6.6
6.0
3.3
2.5
3
2.4
1.5
2
7.8
7.5
6.8
4.3
3.5
3.4
2.7
2.2
3
11
10.6
9.6
6.1
5
4.8
3.9
3.7
5
17.5
16.7
15.2
9.7
7.5
7.6
6.1
5.5
7.5
25.3
24.2
22
14
11
11
9
7.5
10
32.2
30.8
28
18
14
14
11
11
15
48.3
46.2
42
27
21
21
17
15
20
62.1
59.4
54
34
28
27
22
18.5
25
78.2
74.8
68
44
35
34
27
22
30
92
88
80
51
40
40
32
30
40
120
114
104
66
55
52
41
37
50
150
143
130
83
64
65
52
45
60
177
169
154
103
80
77
62
55
75
221
211
192
128
100
96
77
75
100
285
273
248
165
135
124
99
90
125
359
343
312
208
165
156
125
110
150
414
396
360
240
200
180
144
147
200
552
528
480
320
260
240
192
185
250
403
325
302
242
220
300
532
385
361
289
257
350
620
450
414
336
295
400
709
500
477
382
335
450
797
728
515
412
375
500
886
809
590
472
445
600
656
523
700
716
571
800
775
618
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