Application – Three-Phase Motors
Table 27 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 | CIRCUIT | STANDARD | DUAL ELEMENT TIME | CIRCUIT |
FUSE | TIME DELAY FUSE | BREAKER | FUSE | DELAY FUSE | BREAKER |
8"
239660
239600
239610
239661
239601
239611
239662
239602
239612
239663
239603
239613
239664
239604
239614
239165
239105
239115
239166
239106
239116
239167
239107
239117
239168
239108
239118
40 | 30 | 380 |
40 | 30 | 460 |
40 | 30 | 575 |
50 | 37 | 380 |
50 | 37 | 460 |
50 | 37 | 575 |
60 | 45 | 380 |
60 | 45 | 460 |
60 | 45 | 575 |
75 | 55 | 380 |
75 | 55 | 460 |
75 | 55 | 575 |
100 | 75 | 380 |
100 | 75 | 460 |
100 | 75 | 575 |
125 | 90 | 380 |
125 | 90 | 460 |
125 | 90 | 575 |
150 | 110 | 380 |
150 | 110 | 460 |
150 | 110 | 575 |
175 | 130 | 380 |
175 | 130 | 460 |
175 | 130 | 575 |
200 | 150 | 380 |
200 | 150 | 460 |
200 | 150 | 575 |
|
|
|
200
175
150
250
200
175
300
250
200
350
300
250
500
400
350
700
500
450
800
600
500
800
700
600
1000
800
600
125
100
80
150
125
90
175
150
110
200
175
150
275
225
200
400
300
250
450
350
300
500
400
350
600
450
350
175
150
110
200
175
150
250
200
175
300
250
200
400
350
300
600
450
350
600
500
400
700
600
450
800
700
500
200
175
125
225
200
150
300
225
175
350
300
225
450
400
300
600
500
400
700
600
450
800
700
600
1000
800
600
80
70
60
100
80
70
125
100
80
150
125
100
200
175
125
250
225
175
300
250
200
350
300
225
400
350
250
175
150
110
200
175
150
250
200
175
300
250
200
400
350
300
600
450
350
600
500
400
700
600
450
800
700
500
27
