MORE FORMULAS

 WITHOUT OVERLOAD RELAYS WITH OVERLOAD RELAYS  

MOTOR HP

FULL LOAD AMPS

S.F.=1.15 OR MORE TEMP. RISE NOT OVER 40ºC

S.F.= LESS THAN 1.15 OR TEMP. RISE MORE THAN 40ºC

S.F.=1.15 OR MORE TEMP. RISE NOT OVER 40ºC

S.F.= LESS THAN 1.15 OR TEMP. RISE MORE THAN 40ºC

SWITCH OR FUSE CLIP RATING

120 VOLT SINGLE PHASE ( 120 VOLT CIRCUIT )

1/6

4.4

5

5

5 6/10

5 6/10

30

1/4

5.8

7

6 1/4

7 1/2

7

30

1/3

7.2

9

8

9

9

30

1/2

9.8

12

10

15

12

30

3/4

13.8

15

15

17 1/2

17 1/2

30

1

16

20

17 1/2

20

20

30

1 1/2

20

25

20

25

25

30

2

24

30

25

30

30

30

MOTOR HP

FULL LOAD AMPS

S.F.=1.15 OR MORE TEMP. RISE NOT OVER 40ºC

S.F.= LESS THAN 1.15 OR TEMP. RISE MORE THAN 40ºC

S.F.=1.15 OR MORE TEMP. RISE NOT OVER 40ºC

S.F.= LESS THAN 1.15 OR TEMP. RISE MORE THAN 40ºC

SWITCH OR FUSE CLIP RATING

230 VOLT SINGLE PHASE ( 240 VOLT CIRCUIT )

1/6

2.2

2 1/2

2 1/2

2 8/10

2 8/10

30

1/4

2.9

3 1/2

3 2/10

4

3 1/2

30

1/3

3.6

4 1/2

4

4 1/2

4 1/2

30

1/2

4.9

5 6/10

5 6/10

6 1/4

6

30

3/4

6.9

8

7 1/2

9

8

30

1 

8

10

9

10

10

30

1 1/2

10

12

10

15

12

30

2

12

15

12

15

15

30

3

17

20

17 1/2

25

20

30

5

28

35

30*

35

35

60

7 1/2

40

50

45

50

50

60

10

50

60

50

70

60

60

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