Application – Three-Phase Motors
Table 23 Three-Phase Motor Fuse Sizing
TYPE
MOTOR MODEL PREFIX
RATING
HP | KW | VOLTS |
CIRCUIT BREAKERS OR FUSE AMPS | CIRCUIT BREAKERS OR FUSE AMPS | ||||
| (MAXIMUM PER NEC) |
|
| (TYPICAL SUBMERSIBLE) |
|
STANDARD | DUAL ELEMENT TIME | CIRCUIT | STANDARD | DUAL ELEMENT TIME | CIRCUIT |
FUSE | DELAY FUSE | BREAKER | FUSE | DELAY FUSE | BREAKER |
4"
234501
234511
234541
234521
234502
234512
234542
234522
234503
234513
234543
234523
234504
234514
234544
234524
234534
234305
234315
234345
234325
234335
234306
234316
234346
234326
234336
234307
234317
234347
234327
234337
234308
234318
234348
234328
234338
234349
234329
234339
234549
234595
234598
1/2 | 0.37 | 200 |
1/2 | 0.37 | 230 |
1/2 | 0.37 | 380 |
1/2 | 0.37 | 460 |
3/4 | 0.55 | 200 |
3/4 | 0.55 | 230 |
3/4 | 0.55 | 380 |
3/4 | 0.55 | 460 |
1 | 0.75 | 200 |
1 | 0.75 | 230 |
1 | 0.75 | 380 |
1 | 0.75 | 460 |
1.5 | 1.1 | 200 |
1.5 | 1.1 | 230 |
1.5 | 1.1 | 380 |
1.5 | 1.1 | 460 |
1.5 | 1.1 | 575 |
2 | 1.5 | 200 |
2 | 1.5 | 230 |
2 | 1.5 | 380 |
2 | 1.5 | 460 |
2 | 1.5 | 575 |
3 | 2.2 | 200 |
3 | 2.2 | 230 |
3 | 2.2 | 380 |
3 | 2.2 | 460 |
3 | 2.2 | 575 |
5 | 3.7 | 200 |
5 | 3.7 | 230 |
5 | 3.7 | 380 |
5 | 3.7 | 460 |
5 | 3.7 | 575 |
7.5 | 5.5 | 200 |
7.5 | 5.5 | 230 |
7.5 | 5.5 | 380 |
7.5 | 5.5 | 460 |
7.5 | 5.5 | 575 |
10 | 7.5 | 380 |
10 | 7.5 | 460 |
10 | 7.5 | 575 |
10 | 7.5 | 380 |
10 | 7.5 | 460 |
10 | 7.5 | 575 |
10
8
5
4
15
10
6
5
15
15
8
6
20
15
10
8
6
25
25
15
15
10
35
30
20
15
15
60
50
30
25
20
90
80
45
40
30
70
60
45
70
60
45
5
4.5
2.5
2.25
7
5.6
3.5
2.8
8
7
4.5
3.5
12
9
5.6
4.5
3.5
15
12
8
6
5
20
17.5
12
9
7
35
30
17.5
15
12
50
45
25
25
17.5
40
30
25
35
30
25
8
6
4
3
10
8
5
4
15
10
8
5
15
15
8
8
5
20
20
15
10
8
30
25
15
15
10
50
40
25
20
20
70
60
40
30
25
60
45
35
60
45
35
10
8
5
4
12
10
6
5
15
12
8
6
20
15
10
8
6
25
25
15
11
10
35
30
20
15
11
60
45
30
25
20
80
70
40
35
30
60
50
40
60
50
40
4
4
2
2
5
5
3
3
6
6
4
3
8
8
4
4
3
11
10
6
5
4
15
12
8
6
5
25
20
12
10
8
35
30
20
15
12
25
25
20
25
25
20
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
20
20
15
15
15
30
25
15
15
15
50
40
25
20
20
70
60
40
30
25
60
45
35
60
45
35
23
