KR- Services-com LLC
                (prior doing business as KR Services)          
    
            Featuring Off-the Charts 

Motor horsepower average current chart and protection sizing
based on 1800 RPM Fan Motors, 60HZ
Square D Co., 1978
Figures read in chart are the
Typical FLA / Circuit Breaker* / Time delay Fuse

 

Single phase voltage

 

Three phase voltages

   

Size in HP

115vac

230vac

200vac

230vac

460vac

0.16666666

4.4 / 15 / 7

2.2 / 15 / 3.5

-

-

-

0.25

5.8 / 15 / 9

2.9 / 15 / 4.5

-

-

-

0.33333333

7.2 / 15 / 12

3.6 / 15 / 5.6

-

-

-

0.5

9.8 / 20 / 15

4.9 / 15 / 8

2.3 / 15 / 3.5

2 / 15 / 3.2

1 / 15 / 1.6

0.75

13.8 / 25 / 20

6.9 / 15 / 10

 

2.8 / 15 / 5

1.4 / 15 / 2.25

1

16 / 30 / 25

8 / 15 / 12

4.1 / 15 / 6.25

3.6 / 15 / 5.6

1.8 / 15 / 2.8

1.5

20 / 40 / 30

10 / 20 / 15

6 / 15 / 10

5.2 / 15 / 8

2.6 / 15 / 4

2

24 / 50 / 30

12 / 25 / 17.5

7.8 / 15 / 12

6.8 / 15 / 10

3.4 / 15 / 5.6

3

34 / 70 / 50

17 / 35 / 25

11 / 20 / 17.5

9.5 / 20 / 15

4.8 / 15 / 8

5

56 / 90 / 80

28 / 60 / 40

17.5 / 35 / 25

15.2 / 30 / 25

7.6 / 15 / 12

7.5

80 / 110 / 100

40 / 80 / 60

25.3 / 50 / 40

22 / 45 / 30

11 / 20 / 17.5

10

-

50 / 90 / 60

32.2 / 60 / 50

28 / 60 / 40

14 / 25 / 20

15

-

-

48.3 / 90 / 60

42 / 80 / 60

21 / 40 / 30

20

   

62.1 / 100 / 90

54 / 90 / 80

27 / 60 / 40

25

   

78.2 / 110 / 100

68 / 100 / 100

34 / 70 / 50

30

   

92 / 125 / 125

80 / 110 / 100

40 / 80 / 60

40

   

120 / 175 / 175

104 / 150 / 150

52 / 90 / 80

50

   

150 / 200 / 200

130 / 200 / 200

65 / 100 / 100

60

   

177 / 250 / 250

154 / 225 / 200

77 / 110 / 100

75

   

221 / 300 / 300

192 / 250 / 300

96 / 125 / 150

100

   

285 / 400 / 400

248 / 350 / 350

124 / 200 / 175

125

   

359 / 500 / 500

312 / 450 / 400

156 / 225 / 200

150

   

414 / 600 / 600

360 / 500 / 500

180 / 250 / 250

200

   

-

480 / 700 / 600

240 / 350 / 350

* Some localities require a minimum of 20 amp circuit breakers

(Note by KR: This chart is for use in estimating purposes and troubleshooting, manufacturer's specifications may differ slightly

 

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