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Application – Three-Phase Motors
Table 23 Three-Phase Motor Fuse Sizing
TYPE
MOTOR
MODEL
PREFIX
RATING
CIRCUIT BREAKERS OR FUSE AMPS CIRCUIT BREAKERS OR FUSE AMPS
(MAXIMUM PER NEC) (TYPICAL SUBMERSIBLE)
STANDARD
FUSE
DUAL ELEMENT TIME
DELAY FUSE
CIRCUIT
BREAKER
STANDARD
FUSE
DUAL ELEMENT TIME
DELAY FUSE
CIRCUIT
BREAKER
HP KW VOLTS
4"
234501
1/2 0.37
200 10 5 8 10 4 15
234511
1/2 0.37
230 8 4.5 6 8 4 15
234541
1/2 0.37
380 5 2.5 4 5 2 15
234521
1/2 0.37
460 4 2.25 3 4 2 15
234502
3/4 0.55
2001571012515
234512
3/4 0.55
230 10 5.6 8 10 5 15
234542
3/4 0.55
380 6 3.5 5 6 3 15
234522
3/4 0.55
460 5 2.8 4 5 3 15
234503
1 0.75
2001581515615
234513
1 0.75
2301571012615
234543
1 0.75
380 8 4.5 8 8 4 15
234523
1 0.75
460 6 3.5 5 6 3 15
234504
1.5 1.1
200 20 12 15 20 8 15
234514
1.5 1.1
2301591515815
234544
1.5 1.1
380 10 5.6 8 10 4 15
234524
1.5 1.1
460 8 4.5 8 8 4 15
234534
1.5 1.1
575 6 3.5 5 6 3 15
234305
2 1.5
200 25 15 20 25 11 20
234315
2 1.5
230 25 12 20 25 10 20
234345
2 1.5
3801581515615
234325
2 1.5
4601561011515
234335
2 1.5
575 10 5 8 10 4 15
234306
3 2.2
200 35 20 30 35 15 30
234316
3 2.2
230 30 17.5 25 30 12 25
234346
3 2.2
380 20 12 15 20 8 15
234326
3 2.2
4601591515615
234336
3 2.2
5751571011515
234307
5 3.7
200 60 35 50 60 25 50
234317
5 3.7
230 50 30 40 45 20 40
234347
5 3.7
380 30 17.5 25 30 12 25
234327
5 3.7
460 25 15 20 25 10 20
234337
5 3.7
575 20 12 20 20 8 20
234308
7.5 5.5
200 90 50 70 80 35 70
234318
7.5 5.5
230 80 45 60 70 30 60
234348
7.5 5.5
380 45 25 40 40 20 40
234328
7.5 5.5
460 40 25 30 35 15 30
234338
7.5 5.5
575 30 17.5 25 30 12 25
234349
10 7.5
380 70 40 60 60 25 60
234329
10 7.5
460 60 30 45 50 25 45
234339
10 7.5
575 45 25 35 40 20 35
234549
10 7.5
380 70 35 60 60 25 60
234595
10 7.5
460 60 30 45 50 25 45
234598
10 7.5
575 45 25 35 40 20 35
23