Average Amperages for Given Horsepower Motor Ratings
The table below provides the average full-load currents of squirrel cage motors based on NEC (National
Electrical Code) Tables 430-148, 149, and 150. These values are given only as a guide - they may vary
depending on the type of motor and manufacturer. Refer to the actual motor nameplate for full-load
current values.
|
HP
|
115V
|
230V
|
460V
|
|
|
|
Single Phase
|
Single Phase
|
Three Phase
|
Three Phase
|
|
1/10
|
3.0
|
1.5
|
-
|
-
|
|
1/8
|
3.8
|
1.9
|
-
|
-
|
|
1/6
|
4.4
|
2.2
|
-
|
-
|
|
1/4
|
5.8
|
2.9
|
-
|
-
|
|
1/3
|
7.2
|
3.6
|
-
|
-
|
|
1/2
|
9.8
|
4.9
|
2.2
|
1.1
|
|
3/4
|
13.8
|
6.9
|
3.2
|
1.6
|
|
1
|
16.0
|
8.0
|
4.2
|
2.1
|
|
1 1/2
|
20.0
|
10.0
|
6.0
|
3.0
|
|
2
|
24.0
|
12.0
|
6.8
|
3.4
|
|
3
|
34.0
|
17.0
|
9.6
|
4.8
|
|
5
|
56.0
|
28.0
|
15.2
|
7.6
|
|
7 1/2
|
80.0
|
40.0
|
22.0
|
11.0
|
|
10
|
100.0
|
50.0
|
28.0
|
14.0
|
|
15
|
135.0
|
68.0
|
42.0
|
21.0
|
|
20
|
-
|
88.0
|
54.0
|
27.0
|
|
25
|
-
|
110.0
|
68.0
|
34.0
|
|
30
|
-
|
136.0
|
80.0
|
40.0
|
|
40
|
-
|
176.0
|
104.0
|
52.0
|
|
50
|
-
|
216.0
|
130.0
|
65.0
|
|
60
|
-
|
-
|
154.0
|
77.0
|
|
75
|
-
|
-
|
192.0
|
96.0
|
|
100
|
-
|
-
|
248.0
|
124.0
|
|
125
|
-
|
-
|
312.0
|
156.0
|
|
150
|
-
|
-
|
360.0
|
180.0
|
|
200
|
-
|
-
|
480.0
|
240.0
|
|
250
|
-
|
-
|
602.0
|
302.0
|
|
300
|
-
|
-
|
-
|
361.0
|
|
350
|
-
|
-
|
-
|
414.0
|
|
400
|
-
|
-
|
-
|
477.0
|
|
500
|
-
|
-
|
-
|
590.0
|