Thermal Unit Selection

Thermal Unit Selection Tables

General

All tables are based on the operation of the motor and controller in the same ambient temperature, 40 °C (104 °F) or less. Always be certain the correct thermal units are installed in the starter before operating the motor. Each thermal unit shall be installed such that its catalog number is visible. See Approximate Thermal Unit Selection Based On Horsepower and Voltage for information on installing thermal units. On melting alloy thermal units the ratchet wheel must engage the pawl assembly.

Selection Procedure

1.

Determine motor data:

 

a.

Full load current rating

 

b.

Service factor

   

note

If motor full load current (FLC) is not known, a tentative thermal unit selection could be made, based on horsepower and voltage. Refer to Approximate Thermal Unit Selection Based On Horsepower and Voltage.

2.

Motor and controller in same ambient temperature:

 

a.

All starter classes, except Class 8198:

   

1.

For 1.15 to 1.25 service factor motors use 100% of motor FLC for thermal unit selection.

   

2.

For 1.0 service factor motors use 90% of motor FLC for thermal unit selection.

 

b.

Class 8198 only:

   

1.

For 1.0 service factor motors use 100% of motor FLC for thermal unit selection.

   

2.

For 1.15 to 1.25 service factor motors use 110% of motor FLC for thermal unit selection.

3.

Motor and controller in different ambient temperatures:

 

a.

Multiply motor FLC by the multiplier in Selection of Thermal Units for Special Applications. Use the resultant full load current for thermal unit selection.

4.

Locate the proper selection table from the index, pages Thermal Unit Selection and Thermal Unit Selection.

 

a.

The proper thermal unit number will be found adjacent, to the right of the range of full load currents in which the motor FLC or resultant full load current falls.

5.

See Calculation of  the Trip Current Rating for calculation of trip current rating.

Slow Trip Thermal Unit Selection

Thermal Unit Trip Types

Melting Alloy

Type of
Trip

Thermal
Unit Type


Standard

A

B

C

CC

DD

Quick

FB

Slow

SB

To select Type SB slow trip thermal units, the selection table for a standard Type B thermal unit may be used with the following modifications: For continuous rated motors having service factors of 1.15 to 1.25, select thermal units from the standard Type B table using 93% (102% for Class 8198) of the full load current shown on the motor nameplate and then substitute an SB for the B in the thermal unit type number.

Example: A motor with a full load current of 12 A controlled by an 8536SCG3 would require B22 thermal units for standard trip applications and SB19.5 thermal units for slow trip applications. The SB is selected by multiplying 12 A times 93% for 11.16 A and using this value to select B19.5. Then add the S prefix to arrive at SB19.5.

For continuous rated motors having a service factor of 1.0, select thermal units in the same manner using 84% (93% for Class 8198) of full load current shown on the motor nameplate.

note

SB thermal units are used on Size 0, 1, 2, and only some Size 3 applications. Check thermal unit tables for current ranges.

Selection of Thermal Units for Special Applications

Class of Controller

Continuous Duty Motor Service Factor

Melting Alloy

Ambient Temperature of Motor

Same as Controller Ambient

Constant 10 °C (18 °F)
Higher Than Controller Ambient

Constant 10 °C (18 °F)
Lower Than Controller Ambient

Full Load Current Multiplier

All Classes, Except 8198

1.15 to 1.25

1.0

0.9

1.05

1.0

0.9

0.8

0.95

Class 8198

1.15 to 1.25

1.1

1.0

1.15

1.0

1.0

0.9

1.05

Thermal Unit Selection

note

For thermal unit selection tables for other devices including obsolete devices, consult the Customer Care Center at 1-888-778-2733.

Thermal Unit Selection

Controller

Thermal Unit Selection Table Number

Hand Reset Melting Alloy

Starter Type

Class

Type

Series[1]

Size

Standard Trip
(20)

Quick Trip
(10)

Slow Trip
(30)

Manual
Starters
FHP

2510
2512
8908

F

A

FHP

43 [2]

Manual Starters
(Small
Enclosure)

2510

M, T

A

M–0
M–1
M–1P

  1 
  1 
  1 

72
72
72

[3]
[3]
[3]

Manual
Starters
(Large
Enclosure)

2510
2511
2512
8925

M, T

A

M–0
M–1
M–1P

  2 
  2 
  2 

73
73
73

[3]
[3]
[3]

DC
Magnetic
Starters

EC & M Crane Control Product

7135
7136
7735
7736

C, D

1, 2

 65

[3]

E

3

  9

F

4

 10

G

5

 12

AC
Magnetic
Starters
(Small
Enclosure)

8536
8904 [4]
(Starter
In Own
Enclosure)

8933

8998
8999
(Model 3
Control Center)

I-LINE®

and QMB
Motor
Starter
Centers

A
(8536
only)

B, C

00

 17 [2]

SA

A, B

00

 13

[3]

SB

A

0

 13

74

[3]

SC

A

1

 13

74

[3]

A

1P

 41

[3]

SD

A

2

 56

75

[3]

SE

A

3

 18

76 [5]

134 [3] [5]

SF

A

4

 54

SG

A

5

 49

B [6]

5

 59

83

SH

A, B

6

 21

8998
8999
(Model 4
Control Center)

SC

A

1 Fusible

 66

74

1 Circuit Breaker

 15

74

SD

A

2 Fusible

 67

75

2 Circuit Breaker

 58 [7]

75

SE

A

3 Small Enclosure

 16

76 [5]

134 [3] [5]

3 Large Enclosure

 68 [7]

76 [5]

133 [3] [5]

SF

A

4

 61

SG

A

5

 24

SH

A

6

 20

8998
(Model 5 and
Model 6 MCCs)

SC [8]

A

1

109

1 COMPAC 6

104

SD [8]

A

2

110

SE [8]

A

3

111

SF [8]

A

4

112

SG [8]

A

5

113

B

5 CT

103

SH [8]

A

6

114

8911

DPSG

C

20–30 A

135

40 A

145

A

50 A

146

(table continued on the next page)

note

For thermal unit selection tables for other devices, including obsolete devices, consult the Customer Care Center at 1-888-778-2733.

Thermal Unit Selection

Thermal Unit Selection

Controller

Thermal Unit Selection Table Number

Hand Reset Melting Alloy

Starter Type

Class

Type

Series[1]

Size

Standard Trip
(20)

Quick Trip
(10)

Slow Trip
(30)

AC
Magnetic
Starters
(Large
Enclosure)

8198

G, S

5

[3]

8536

(Starter Used in
Multi-Motor Panel)

A (8536 only)

B, C

00

14 [2]

8538

8904[9]

SA

A, B

00

53

[3]

8539

8906

SB, NB

A

0

15

78

[3]

8606

8907

SC, NC

A

1

15

78

[3]

8630 [10]

8920

SD, ND

A

2

58

79

[3]

8640 [11]

8922

SE, NE

A

3

16

80 [5]

133 [5] [3]

9089

8924

SF, NF

A

4

61

8647

8925

SG

A

5

24

8650

8930

B [6]

5

59

83

8736

8738 

8739 

8941

SH

A, B

6

20

[3]

8810
8811
8812

CB, DB, SB, UB

A

0

15

78

[3]

CC, DC, SC, UC

A

1

15

78

[3]

CD, DD, SD, UD

A

2

58

79

[3]

CE, DE, SE, UE

A

3

16

80 [5]

133 [5] [3]

CF, DF, SF, UF

A

4

61

CG, DG, SG, UG

A

5

24

B [6]

5

59

83

CH, DH, SH, UH

A

6

20

[3]

8940

WELL-GUARD™
Control

WC, XC

A

1

13

78

WD, XD, MD, RD, VD

A

2

56

79

WE, XE, ME, RE, VE

A

3

18

80 [5]

PF, WF, XF, MF, RF, VF, PE

A

4

54

8911

DPSO

C

20–30 A

136

40 A

147

A

50 A

148

AC
Magnetic
Part-
Winding

8998
(Model 5 and
Model 6 MCCs)

SC [8]

A

1

127

SD [8]

A

2

128

SE [8]

A

3

129

SF

A

4

105

SG

A

5

115

B [6]

5 CT

116

Separately Mounted Overload Relays

9065

C

A

1 (25 A)

 44

82

[3]

F

B

4 (133 A)

 19

G

A

5 (266 A)

 22

MEO

A

(32 A)

 86

S

A

1 (26 A)

 59

83

[3]

2 (45 A)

 69

84

[3]

3 (86 A)

 34

4 (133 A)

 28

T

A

2 (45 A)

 31

[3]

U

3 (86 A)

 40

note

For thermal unit selection tables for other devices including obsolete devices, consult the Customer Care Center at 1-888-778-2733.

Calculation of  the Trip Current Rating

Trip Current Rating—The trip current rating is a nominal value that approximates the minimum current to trip an overload relay in an ambient temperature, outside of the enclosure, of 40 °C (104 °F). In all selection tables except Class 8198, the trip current rating is 1.25 times the minimum full load current shown for the thermal unit selected. For Class 8198, the trip current rating is 1.15 times the minimum full load current. This applies to bimetallic overload relays with the trip adjustment set at 100 percent.

Calculation Procedure

  1. Use the selection table for the specific controller involved.

  2. Find the minimum motor full load current listed for the thermal unit in question.

  3. Multiply that current by 1.25 (1.15 for Class 8198). The result is the trip current rating.

Example 1: Determine the thermal unit selection and trip current rating for thermal units in a Class 8536 Type SCG3 Size 1 magnetic starter used to control a three-phase, 1.15 service factor motor with a full load current of 17.0 Amperes, where the motor and controller are both located in a 40oC (104oF) ambient temperature.

  1. From Table 13 the proper selection is B32.

  2. The minimum motor full load current is 16. 0 Amperes.

  3. Trip current rating is 16.0 x 1.25= 20.0 Amperes.

Protection Level is the relationship between trip current rating and full load current. Protection level, in percent, is the trip current rating divided by the motor full load current times 100. In Example 1 the protection level for the B32 thermal unit is: 20.0/17.0 x 100=118%.

National Electrical Code, Section 430-32, allows a maximum protection level of 125% for the motor in the above example.

Minimum Trip Current (also called ultimate current) may vary from the trip current rating value, since ratings are established under standardized test conditions. Factors which influence variations include: the number of thermal units installed, enclosure size, proximity to heat producing devices, size of conductors installed, ambient (room) temperature, and others.

Except for ambient temperature-compensated overload relays, an ambient temperature higher than 40oC would lower the trip current, and a lower temperature would increase it. This variation is not a factor in selecting thermal units for the average application, since most motor ratings are based on an ambient temperature of 40 °C, and motor capacity varies with temperature in about the same proportion as the change in trip current. Temperature-compensated relays maintain a nearly constant trip current over a wide range of ambient temperature, and are intended for use where the relay, because of its location, cannot sense changes in the motor ambient temperature.

Calculation of  the Trip Current for Ambient Temperatures Other Than 40 °C

For a controller ambient temperature other than 40 °C (104 °F) trip current can be calculated by applying a correction factor from the curve in
Figure 1. The approximate trip current for a particular ambient temperature is the product of (1) the multiplier M corresponding to the temperature and (2) the 40 °C trip current rating.

note

Ambient temperature is the temperature surrounding the starter enclosure. Normal temperature rise inside the enclosure has been taken into account in preparing the thermal unit selection tables.

Example 2: Determine the trip current for the motor and controller in Example 1, except the controller is in a 30 °C (86 °F) ambient temperature. From the curve in Figure 1 the multiplier M is 1.1 at 30 °C. The approximate trip current is 16.0 × 1.25 × 1.1 = 22 A.

Approximate Thermal Unit Selection Based On Horsepower and Voltage

General—Thermal units selected using approximate full-load currents from Use This Table Only When the Motor Full-Load Current Is Not Known will provide a trip current between 101% and 125% of full-load current for many 4-pole, single speed, normal torque, 60 Hz motors. Since full-load current rating of different makes and types of motors vary so widely, these selections may not be suitable.

Thermal units should be selected on the basis of motor nameplate full-load current and service factor. Thermal unit sizes originally selected on an approximate basis should always be rechecked and corrected at the time of installation if required.

How to use Use This Table Only When the Motor Full-Load Current Is Not Known:

Use This Table Only When the Motor Full-Load Current Is Not Known

Motor
Horsepower

Motor Full-Load Current

Three Ø

Single Ø

200 V

230 V

460 V

575 V

115 V

230 V

   1/6

4.4

2.2

   1/4

5.8

2.9

   1/3

7.2

3.6

   1/2

2.5

2.2

1.1

0.9

9.8

4.9

   3/4

3.7

3.2

1.6

1.3

13.8

6.9

  1

4.8

4.2

2.1

1.7

16

8

    1-1/2

6.9

6.0

3.0

2.4

20

10

  2

7.8

6.8

3.4

2.7

24

12

  3

11.0

9.6

4.8

3.9

34

17

  5

17.5

15.2

7.6

6.1

56

28

    7-1/2

25.3

22

11

9

80

40

 10

32.2

28

14

11

50

 15

48.3

42

21

17

 20

62.1

54

27

22

 25

78.2

68

34

27

 30

92

80

40

32

 40

120

104

52

41

 50

150

130

65

52

 60

177

154

77

62

 75

221

192

96

77

100

285

248

124

99

125

359

312

156

125

150

414

360

180

144

200

552

480

240

192

note

These currents should not be used for selection of fuses, circuit breakers or wire sizes. See NEC tables 430-248 through 430-250. For motors rated 208-220 volts, use 230 V column. For motors rated 440 to 550 volts, use 460 and 575 V columns, respectively.

Mounting of the Thermal Units

Figure 1

Always be certain the correct thermal units are installed in the starter before operating the motor. Thermal units should always be mounted so that their type designation can be read from the front of the starter (see Figure 1). Melting alloy thermal units should be mounted so that the tooth of the pawl assembly can engage the teeth of the ratchet wheel when the reset button is pushed.

Mounting surfaces of starter and thermal units should be clean and care should be taken to insure that thermal unit mounting screws are fastened securely.

Thermal Unit Selection Tables

Thermal Unit Selection Tables

Thermal Unit Table 1
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1 T.U.

3 T.U.

0.33–0.36
0.37–0.40
0.41–0.45
0.46–0.52
0.53–0.59

0.29–0.32
0.33–0.36
0.37–0.39
0.40–0.47
0.48–0.56

B 0.44
B 0.51
B 0.57
B 0.63
B 0.71

0.60–0.66
0.67–0.73
0.74–0.81
0.82–0.91
0.92–1.02

0.57–0.63
0.64–0.69
0.70–0.77
0.78–0.86
0.87–0.96

B 0.81
B 0.92
B 1.03
B 1.16
B 1.30

1.03–1.14
1.15–1.29
1.20–1.42
1.43–1.64
1.65–1.80

0.97–1.11
1.12–1.23
1.24–1.37
1.38–1.55
1.56–1.75

B 1.45
B 1.67
B 1.88
B 2.10
B 2.40

1.81–2.10
2.11–2.30
2.31–2.61
2.62–2.99
3.00–3.37

1.76–1.92
1.93–2.16
2.17–2.50
2.51–2.81
2.82–3.16

B 2.65
B 3.00
B 3.30
B 3.70
B 4.15

3.38–3.94
3.95–4.24
4.25–4.54
4.55–5.29
5.30–5.73

3.17–3.40
3.41–3.76
3.77–4.00
4.01–4.68
4.69–5.18

B 4.85
B 5.50
B 6.25
B 6.90
B 7.70

5.74–6.35
6.36–7.08
7.09–7.83
7.84–8.47
8.48–9.83

5.19–5.51
5.52–6.19
6.20–7.12
7.13–8.15
8.16–8.60

B 8.20
B 9.10
B 10.2
B 11.5
B 12.8

9.84–10.5
10.6–11.4
11.5–12.8
12.9–13.9
14.0–16.1
16.2–18.0

8.61–9.21
9.22–10.1
10.2–11.2
11.3–12.0

B 14.0
B 15.5
B 17.5
B 19.5
B 22.0
B 25.0

Following Selections
for Size M-1 & M-1P Only.



16.2–17.6
17.7–20.6
20.7–23.1
23.2–26.0

11.3–12.1
12.2–13.6
13.7–15.3
15.4–17.3
17.4–19.1
19.2–21.7
21.8–24.2
24.3–26.0

B 19.5
B 22.0
B 25.0
B 28.0
B 32.0
B 36.0
B 40.0
B 45.0

Following Selections
for Size M-1P Only

23.2–27.1
27.2–29.2
29.3–33.0
33.1–36.0




B 36.0
B 40.0
B 45.0
B 50.0

Thermal Unit Table 2
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1 T.U.

3 T.U.

0.35–0.38
0.39–0.43
0.44–0.48
0.49–0.56
0.57–0.63

0.30–0.32
0.33–0.37
0.38–0.39
0.40–0.48
0.49–0.57

B 0.44
B 0.51
B 0.57
B 0.63
B 0.71

0.64–0.71
0.72–0.78
0.79–0.88
0.89–0.99
1.00–1.15

0.58–0.64
0.65–0.70
0.71–0.78
0.79–0.87
0.88–0.98

B 0.81
B 0.92
B 1.03
B 1.16
B 1.30

1.16–1.23
1.24–1.43
1.44–1.51
1.52–1.75
1.76–1.93

0.99–1.13
1.14–1.25
1.26–1.40
1.41–1.58
1.59–1.79

B 1.45
B 1.67
B 1.88
B 2.10
B 2.40

1.94–2.25
2.26–2.47
2.48–2.81
2.82–3.20
3.21–3.63

1.80–1.91
1.92–2.20
2.21–2.55
2.56–2.87
2.88–3.24

B 2.65
B 3.00
B 3.30
B 3.70
B 4.15

3.64–4.19
4.20–4.53
4.54–4.89
4.90–5.68
5.69–6.27

3.25–3.48
3.49–3.85
3.86–4.10
4.11–4.79
4.80–5.31

B 4.85
B 5.50
B 6.25
B 6.90
B 7.70

6.28–6.85
6.86–7.73
7.74–8.50
8.51–9.29
9.30–10.4

5.32–5.65
5.66–6.35
6.36–7.31
7.32–8.34
8.35–8.84

B 8.20
B 9.10
B 10.2
B 11.5
B 12.8

10.5–11.3
11.4–12.3
12.4–13.9
14.0–15.0
15.1–18.0

8.85–9.47
9.48–10.4
10.5–11.5
11.6–12.0

B 14.0
B 15.5
B 17.5
B 19.5
B 22.0

Following Selections
for Size M-1 & M-1P Only.


15.1–17.4
17.5–19.2
19.3–22.0
22.1–24.6

11.6–12.4
12.5–14.0
14.1–15.8
15.9–17.8
17.9–19.7

B 19.5
B 22.0
B 25.0
B 28.0
B 32.0

24.7–26.0

19.8–22.4
22.5–25.1
25.1–26.0

B 36.0
B 40.0
B 45.0

Following Selections
for Size M-1P Only.

24.7–29.1
29.2–31.7
31.8–36.0



B 36.0
B 40.0
B 45.0

Thermal Unit Table 3
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1 T.U.

3 T.U.

0.29–0.31
0.32–0.36
0.37–0.39
0.40–0.47
0.48–0.56

0.28–0.29
0.30–0.33
0.34–0.36
0.37–0.44
0.45–0.52

B 0.44
B 0.51
B 0.57
B 0.63
B 0.71

0.57–0.63
0.64–0.69
0.70–0.77
0.78–0.86
0.87–0.97

0.53–0.59
0.60–0.64
0.65–0.71
0.72–0.80
0.81–0.90

B 0.81
B 0.92
B 1.03
B 1.16
B 1.30

0.98–1.12
1.13–1.24
1.25–1.39
1.40–1.57
1.58–1.78

0.91–1.03
1.04–1.14
1.15–1.27
1.28–1.44
1.45–1.63

B 1.45
B 1.67
B 1.88
B 2.10
B 2.40

1.79–1.96
1.97–2.20
2.21–2.41
2.42–2.75
2.76–3.25

1.64–1.79
1.80–2.01
2.02–2.19
2.20–2.52
2.53–2.95

B 2.65
B 3.00
B 3.30
B 3.70
B 4.15

3.26–3.50
3.51–3.87
3.88–4.13
4.14–4.69
4.70–5.20

2.96–3.17
3.18–3.50
3.51–3.73
3.74–4.22
4.23–4.68

B 4.85
B 5.50
B 6.25
B 6.90
B 7.70

5.21–5.53
5.54–6.23
6.24–7.18
7.19–8.20
8.21–8.98

4.69–4.98
4.99–5.59
5.60–6.43
6.44–7.41
7.42–8.02

B 8.20
B 9.10
B 10.2
B 11.5
B 12.8

8.99–9.63
9.64–10.6
10.7–11.8
11.9–12.7
12.8–14.3

8.03–8.59
8.60–9.52
9.53–10.5
10.6–11.2
11.3–12.0

B 14.0
B 15.5
B 17.5
B 19.5
B 22.0

14.4–16.1
16.2–18.0


B 25.0
B 28.0

Following Selections
for Size M-1 & M-1P Only.



16.2–18.3
18.4–20.2
20.3–23.0

11.3–12.7
12.8–14.3
14.4–16.1
16.2–17.8
17.9–20.1

B 22.0
B 25.0
B 28.0
B 32.0
B 36.0

23.1–26.0

20.2–22.6
22.7–25.5
25.6–26.0

B 40.0
B 45.0
B 50.0

Following Selections
for Size M-1P Only

25.9–29.0
29.1–30.8
30.9–32.7
32.8–36.0




B 45.0
B 50.0
B 56.0
B 62.0

Thermal Unit Table 4
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1 T.U.

3 T.U.

0.32–0.33
0.34–0.38
0.39–0.41
0.42–0.50
0.51–0.61

0.29–0.30
0.31–0.35
0.36–0.37
0.38–0.45
0.46–0.54

B 0.44

B 0.51
B 0.57
B 0.63
B 0.71

0.62–0.68
0.69–0.74
0.75–0.83
0.84–0.93
0.94–1.05

0.55–0.61
0.62–0.66
0.67–0.74
0.75–0.83
0.84–0.93

B 0.81
B 0.92
B 1.03
B 1.16
B 1.30

1.06–1.21
1.22–1.34
1.35–1.50
1.51–1.70
1.71–1.93

0.94–1.07
1.08–1.19
1.20–1.33
1.34–1.51
1.52–1.70

B 1.45
B 1.67
B 1.88
B 2.10
B 2.40

1.94–2.12
2.13–2.38
2.39–2.61
2.62–2.99
3.00–3.53

1.71–1.87
1.88–2.10
2.11–2.29
2.30–2.63
2.64–3.09

B 2.65
B 3.00
B 3.30
B 3.70
B 4.15

3.54–3.80
3.81–4.21
4.22–4.49
4.50–5.10
5.11–5.66

3.10–3.32
3.33–3.67
3.68–3.91
3.92–4.43
4.44–4.91

B 4.85
B 5.50
B 6.25
B 6.90
B 7.70

5.67–6.03
6.04–6.79
6.80–7.84
7.85–8.96
8.97–9.82

4.92–5.23
5.24–5.88
5.89–6.77
6.78–7.90
7.91–8.44

B 8.20
B 9.10
B 10.2
B 11.5
B 12.8

9.83–10.4
10.5–11.6
11.7–12.9
13.0–13.9
14.0–15.7
15.8–18.0

8.45–9.05
9.06–9.99
10.0–11.0
11.1–11.9
12.0–12.0

B 14.0
B 15.5
B 17.5
B 19.5
B 22.0
B 25.0

Following Selections
for Size M-1 & M-1P Only.



17.8–20.1
20.2–22.2
22.3–25.3
25.4–26.0

12.0–13.4
13.5–15.1
15.2–17.0
17.1–18.9
19.0–21.4
21.5–24.0
24.1–26.0

B 22.0
B 25.0
B 28.0
B 32.0
B 36.0
B 40.0
B 45.0

Following Selections
for Size M-1P Only.

25.4–28.4
28.5–33.1
33.2–36.0



B 40.0
B 45.0
B 50.0

Thermal Unit Table 5
(index and instructions: General to Mounting Thermal Units)

Current Transformer Ratio

Thermal Unit Number

25/5

50/5

75/5

100/5

150/5

200/5

250/5

300/5

400/5

500/5

Motor FLC

 

10.6–11.7
11.8–13.2
13.3–14.8

21.1–23.6
23.7–26.5
26.6–29.6

31.7–35.4
35.5–39.8
39.9–44.5

42.3–47.2
47.3–53.1
53.2–59.4

63.4–70.9
71.0–79.7
79.8–89.1

84.5–94.6
94.7–105.
106.–118.

106.–117.
118.–132.
133.–148.

127.–141.
142.–159.
160.–177.

169.–188.
189.–212.
213.–237.

211.–236.
237.–265.
266.–296.

B 3.00
B 3.30
B 3.70

14.9–17.2
17.3–19.6
19.7–22.3

29.7–34.5
34.6–39.2
39.3–44.6

44.6–51.8
51.9–58.9
59.0–67.0

59.5–69.2
69.3–78.6
78.7–89.3

89.2–103.
104.–117.
118.–133.

119.–138.
139.–156.
157.–178.

149.–172.
173.–196.
197.–223.

178.–207.
208.–235.
236.–267.

238.–276.
277.–314.
315.–357.

297.–345.
346.–360.

B 4.15
B 4.85
B 5.50

Thermal Unit Table 9
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

15.3–16.7
16.8–19.8
19.9–22.8
22.9–25.8
25.9–30.4





30.5–31.9
32.0–34.2
34.3–38.8
38.9–44.2
44.3–50.2





50.3–57.1
57.2–63.2
63.3–68.6
68.7–78.6
78.7–86.9
87.0–100.0




C 90.0

Thermal Unit Table 10
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

43.6–47.3
47.4–51.3
51.4–54.6
54.7–59.7
59.8–65.1

CC 54.5
CC 59.4
CC 64.3
CC 68.5
CC 74.6

65.2–70.1
70.2–75.1
75.2–82.2
82.3–89.2
89.3–96.5

CC 81.5
CC 87.7
CC 94.0

CC 112.0

96.6–104.
105.–113.
114.–123.
124.–132.
133.–150.

CC 121.0
CC 132.0
CC 143.0
CC 156.0
CC 167.0

Thermal Unit Table 12
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

92.–100.
101.–109.
110.–119.
120.–131.
132.–139.

DD 112.0



DD 150.0

140.–156.
157.–166.
167.–180.
181.–189.
190.–209.

DD 160.0
DD 185.0


210.–225.
226.–238.
239.–263.
264.–300.

DD 250.0
DD 265.0
DD 280.0

Thermal Unit Table 14
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1.T.U.

2 T.U.

3 T.U.

0.43–0.47
0.48–0.51
0.52–0.56
0.57–0.64
0.65–0.69

0.41–0.45
0.46–0.50
0.51–0.55
0.56–0.62
0.63–0.67

0.40–0.41
0.42–0.46
0.47–0.51
0.52–0.57
0.58–0.62

A .49
A .54
A .59
A .65
A .71

0.70–0.76
0.77–0.84
0.85–0.91
0.92–1.01
1.02–1.15

0.68–0.72
0.73–0.81
0.82–0.88
0.89–0.97
0.98–1.08

0.63–0.67
0.68–0.75
0.76–0.80
0.81–0.89
0.90–1.02

A .78
A .86
A .95
A 1.02
A 1.16

1.16–1.23
1.24–1.37
1.38–1.45
1.46–1.56
1.57–1.67

1.09–1.18
1.19–1.32
1.33–1.40
1.41–1.48
1.49–1.60

1.03–1.09
1.10–1.21
1.22–1.29
1.30–1.37
1.38–1.48

A 1.25
A 1.39
A 1.54
A 1.63
A 1.75

1.68–1.77
1.78–1.92
1.93–2.09
2.10–2.31
2.32–2.56

1.61–1.72
1.73–1.84
1.85–2.00
2.01–2.22
2.23–2.45

1.49–1.58
1.59–1.72
1.73–1.85
1.86–2.05
2.06–2.29

A 1.86
A 1.99
A 2.15
A 2.31
A 2.57

2.57–2.92
2.93–3.16
3.17–3.48
3.49–3.83
3.84–4.24

2.46–2.82
2.83–3.08
3.09–3.39
3.40–3.75
3.76–4.16

2.30–2.62
2.63–2.84
2.85–3.10
3.11–3.46
3.47–3.85

A 2.81
A 3.61
A 3.95
A 4.32
A 4.79

4.25–4.62
4.63–4.92
4.93–5.61
5.62–5.85
5.86–6.36

4.17–4.51
4.52–4.83
4.84–5.49
5.50–5.67
5.68–6.16

3.86–4.16
4.17–4.46
4.47–5.08
5.09–5.35
5.36–5.82

A 5.30
A 5.78
A 6.20
A 6.99
A 7.65

6.37–6.99
7.00–7.67
7.68–8.15
8.16–9.00

6.17–6.75
6.76–7.00

5.83–6.34
6.35–6.95
6.96–7.00

A 8.38
A 9.25
A 9.85
A 11.0

Thermal Unit Table 13
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1.T.U.

2 T.U.

3 T.U.

0.29–0.31
0.32–0.34
0.35–0.38
0.39–0.45
0.46–0.54

0.29–0.31
0.32–0.34
0.35–0.38
0.39–0.45
0.46–0.54

0.28–0.30
0.31–0.34
0.35–0.37
0.38–0.44
0.45–0.53

B 0.44
B 0.51
B 0.57
B 0.63
B 0.71

0.55–0.61
0.62–0.66
0.67–0.73
0.74–0.81
0.82–0.94

0.55–0.61
0.62–0.66
0.67–0.73
0.74–0.81
0.82–0.94

0.54–0.59
0.60–0.64
0.65–0.72
0.73–0.80
0.81–0.90

B 0.81
B 0.92
B 1.03
B 1.16
B 1.30

0.95–1.05
1.06–1.22
1.23–1.34
1.35–1.51
1.52–1.71

0.95–1.05
1.06–1.22
1.23–1.34
1.35–1.51
1.52–1.71

0.91–1.03
1.04–1.14
1.15–1.27
1.28–1.43
1.44–1.62

B 1.45
B 1.67
B 1.88
B 2.10
B 2.40

1.72–1.93
1.94–2.14
2.15–2.40
2.41–2.72
2.73–3.15

1.72–1.93
1.94–2.14
2.15–2.40
2.41–2.72
2.73–3.15

1.63–1.77
1.78–1.97
1.98–2.32
2.33–2.51
2.52–2.99

B 2.65
B 3.00
B 3.30
B 3.70
B 4.15

3.16–3.55
3.56–4.00
4.01–4.40
4.41–4.88
4.89–5.19

3.16–3.55
3.56–4.00
4.01–4.40
4.41–4.88
4.89–5.19

3.00–3.42
3.43–3.75
3.76–3.98
3.99–4.48
4.49–4.93

B 4.85
B 5.50
B 6.25
B 6.90
B 7.70

5.20–5.73
5.74–6.39
6.40–7.13
7.14–7.90
7.91–8.55

5.20–5.73
5.74–6.39
6.40–7.13
7.14–7.90
7.91–8.55

4.94–5.21
5.22–5.84
5.85–6.67
6.68–7.54
7.55–8.14

B 8.20
B 9.10
B 10.2
B 11.5
B 12.8

8.56–9.53
9.54–10.6
10.7–11.8
11.9–13.2
13.3–14.9

8.56–9.53
9.54–10.6
10.7–11.8
11.9–12.0

8.15–8.72
8.73–9.66
9.67–10.5
10.6–11.3
11.4–12.0

B 14.0
B 15.5
B 17.5
B 19.5
B 22.0

15.0–16.6
16.7–18.0



B 25.0
B 28.0

Following Selections for Size 1 Only




16.7–18.9
19.0–21.2

11.9–13.2
13.3–14.9
15.0–16.6
16.7–18.9
19.0–21.2


11.4–12.7
12.8–14.1
14.2–15.9
16.0–17.5

B 19.5
B 22.0
B 25.0
B 28.0
B 32.0

21.3–23.0
23.1–25.5
25.6–26.0

21.3–23.0
23.1–25.5
25.6–26.0

17.6–19.7
19.8–21.9
22.0–24.4
24.5–26.0

B 36.0
B 40.0
B 45.0
B 50.0

Thermal Unit Table 15
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1.T.U.

2 T.U.

3 T.U.

0.31–0.33
0.34–0.36
0.37–0.40
0.41–0.48
0.49–0.57

0.31–0.33
0.34–0.36
0.37–0.40
0.41–0.48
0.49–0.57

0.29–0.31
0.32–0.36
0.37–0.38
0.39–0.46
0.47–0.55

B 0.44
B 0.51
B 0.57
B 0.63
B 0.71

0.58–0.64
0.65–0.70
0.71–0.77
0.78–0.85
0.86–0.99

0.58–0.64
0.65–0.70
0.71–0.77
0.78–0.85
0.86–0.99

0.56–0.61
0.62–0.66
0.67–0.75
0.76–0.83
0.84–0.93

B 0.81
B 0.92
B 1.03
B 1.16
B 1.30

1.00–1.10
1.11–1.28
1.29–1.41
1.42–1.58
1.59–1.80

1.00–1.10
1.11–1.28
1.29–1.41
1.42–1.58
1.59–1.80

0.94–1.06
1.07–1.18
1.19–1.31
1.32–1.47
1.48–1.67

B 1.45
B 1.67
B 1.88
B 2.10
B 2.40

1.81–2.03
2.04–2.25
2.26–2.51
2.52–2.83
2.84–3.29

1.81–2.03
2.04–2.25
2.26–2.51
2.52–2.83
2.84–3.29

1.68–1.83
1.84–2.04
2.05–2.38
2.39–2.60
2.61–3.13

B 2.65
B 3.00
B 3.30
B 3.70
B 4.15

3.30–3.75
3.76–4.22
4.23–4.65
4.66–5.16
5.17–5.53

3.30–3.75
3.76–4.22
4.23–4.65
4.66–5.16
5.17–5.53

3.14–3.59
3.60–3.94
3.95–4.19
4.20–4.72
4.73–5.21

B 4.85
B 5.50
B 6.25
B 6.90
B 7.70

5.54–6.09
6.10–6.80
6.81–7.60
7.61–8.35
8.36–9.04

5.54–6.09
6.10–6.80
6.81–7.60
7.61–8.35
8.36–9.04

5.22–5.51
5.52–6.17
6.18–7.07
7.08–8.05
8.06–8.69

B 8.20
B 9.10
B 10.2
B 11.5
B 12.8

9.05–9.99
10.0–11.1
11.2–12.3
12.4–13.7
13.8–15.4

9.05–9.99
10.0–11.1
11.2–12.0

8.70–9.32
9.33–10.2
10.3–11.3
11.4–12.0

B 14.0
B 15.5
B 17.5
B 19.5
B 22.0

15.5–18.0

B 25.0

Following Selections for Size 1 Only




15.5–17.2
17.3–19.4

11.2–12.3
12.4–13.7
13.8–15.4
15.5–17.2
17.3–19.4


11.4–12.1
12.2–13.7
13.8–15.2
15.3–17.2

B 17.5
B 19.5
B 22.0
B 25.0
B 28.0

19.5–21.7
21.8–23.9
24.0–26.0

19.5–21.7
21.8–23.9
24.0–26.0

17.3–18.9
19.0–21.4
21.5–23.7
23.8–26.0

B 32.0
B 36.0
B 40.0
B 45.0

Thermal Unit Table 16
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1.T.U.

2 T.U.

3 T.U.

16.2–17.5
17.6–18.8
18.9–20.5
20.6–22.2
22.3–23.7

15.1–16.2
16.3–17.3
17.4–19.5
19.6–20.7
20.8–22.3

14.3–15.4
15.5–16.4
16.5–18.5
18.6–19.6
19.7–21.1


CC 22.8
CC 24.6
CC 26.3
CC 28.8

23.8–25.4
25.5–27.3
27.4–29.3
29.4–31.5
31.6–33.9

22.4–24.0
24.1–25.7
25.8–27.5
27.6–29.6
29.7–31.7

21.2–22.7
22.8–24.4
24.5–26.1
26.2–28.1
28.2–30.0

CC 31.0
CC 33.3
CC 36.4
CC 39.6
CC 42.7

34.0–36.2
36.3–39.3
39.4–42.3
42.4–45.3
45.4–48.3

31.8–33.9
34.0–36.6
36.7–39.3
39.4–42.3
42.4–44.9

30.1–32.1
32.2–34.7
34.8–37.3
37.4–40.1
40.2–42.6

CC 46.6
CC 50.1
CC 54.5
CC 59.4
CC 64.3

48.4–52.0
52.1–54.9
55.0–59.7
59.8–65.4
65.5–69.6

45.0–48.3
48.4–50.9
51.0–55.5
55.6–59.9
60.0–64.2

42.7–45.8
45.9–48.3
48.4–52.6
52.7–56.8
56.9–60.9

CC 68.5
CC 74.6
CC 81.5
CC 87.7
CC 94.0

69.7–74.8
74.9–79.7
79.8–83.1
83.2–86.0

64.3–68.7
68.8–71.4
71.5–74.8
74.9–78.0
78.1–80.7

61.0–65.1
65.2–67.7
67.8–70.9
71.0–73.9
74.0–76.5


CC 112.0
CC 121.0
CC 132.0
CC 143.0



80.8–86.0

76.6–80.2
80.3–83.1
83.2–86.0

CC 156.0
CC 167.0
CC 180.0

Thermal Unit Table 17
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1.T.U.

2 T.U.

3 T.U.

0.42–0.46
0.47–0.50
0.51–0.55
0.56–0.62
0.63–0.67

0.39–0.43
0.44–0.47
0.48–0.52
0.53–0.58
0.59–0.64

0.38–0.40
0.41–0.44
0.45–0.49
0.50–0.55
0.56–0.60

A .49
A .54
A .59
A .65
A .71

0.68–0.73
0.74–0.81
0.82–0.89
0.90–0.98
0.99–1.12

0.65–0.68
0.69–0.77
0.78–0.84
0.85–0.93
0.94–1.05

0.61–0.65
0.66–0.72
0.73–0.79
0.80–0.88
0.89–0.98

A .78
A .86
A .95
A 1.02
A 1.16

1.13–1.20
1.21–1.34
1.35–1.41
1.42–1.51
1.52–1.62

1.06–1.13
1.14–1.25
1.26–1.33
1.34–1.42
1.43–1.52

0.99–1.07
1.08–1.17
1.18–1.25
1.26–1.33
1.34–1.44

A 1.25
A 1.39
A 1.54
A 1.63
A 1.75

1.63–1.73
1.74–1.86
1.87–2.02
2.03–2.25
2.26–2.46

1.53–1.63
1.64–1.75
1.76–1.90
1.91–2.13
2.14–2.33

1.45–1.53
1.54–1.65
1.66–1.79
1.80–1.99
2.00–2.18

A 1.86
A 1.99
A 2.15
A 2.31
A 2.57

2.47–2.77
2.78–2.99
3.00–3.26
3.27–3.59
3.60–3.99

2.34–2.73
2.74–2.86
2.87–3.14
3.15–3.47
3.48–3.83

2.19–2.45
2.46–2.65
2.66–2.90
2.91–3.19
3.20–3.56

A 2.81
A 3.61
A 3.95
A 4.32
A 4.79

4.00–4.42
4.43–4.61
4.62–5.23
5.24–5.39
5.40–5.88

3.84–4.16
4.17–4.43
4.44–5.00
5.01–5.16
5.17–5.56

3.57–3.83
3.84–4.08
4.09–4.64
4.65–5.00
5.01–5.36

A 5.30
A 5.78
A 6.20
A 6.99
A 7.65

5.89–6.56
6.57–7.18
7.19–7.80
7.81–9.00

5.57–6.22
6.23–6.89
6.90–7.00

5.37–5.87
5.88–6.43
6.44–6.79
6.80–7.00

A 8.38
A 9.25
A 9.85
A 11.0

Thermal Unit Table 18
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1.T.U.

2 T.U.

3 T.U.

15.5–16.4
16.5–17.6
17.7–19.1
19.2–20.4
20.5–22.1

14.4–15.3
15.4–16.4
16.5–18.4
18.5–19.6
19.7–21.0

13.6–14.5
14.6–15.5
15.6–17.4
17.5–18.5
18.6–19.9


CC 22.8
CC 24.6
CC 26.3
CC 28.8

22.2–23.4
23.5–25.6
25.7–27.3
27.4–29.4
29.5–31.5

21.1–22.7
22.8–24.2
24.3–25.9
26.0–27.8
27.9–29.8

20.0–21.5
21.6–22.9
23.0–24.5
24.6–26.3
26.4–28.2

CC 31.0
CC 33.3
CC 36.4
CC 39.6
CC 42.7

31.6–33.7
33.8–36.5
36.6–39.1
39.2–41.7
41.8–44.8

29.9–31.7
31.8–34.2
34.3–36.9
37.0–39.8
39.9–42.3

28.3–30.0
30.1–32.3
32.4–34.9
35.0–37.6
37.7–40.0

CC 46.6
CC 50.1
CC 54.5
CC 59.4
CC 64.3

44.9–48.0
48.1–50.7
50.8–54.9
55.0–59.9
60.0–63.3

42.4–45.3
45.4–47.9
48.0–51.9
52.0–56.5
56.6–60.7

40.1–42.8
42.9–45.3
45.4–49.1
49.2–53.4
53.5–57.4

CC 68.5
CC 74.6
CC 81.5
CC 87.7
CC 94.0

63.4–67.2
67.3–72.4
72.5–74.9
75.0–77.4
77.5–80.7

60.8–64.8
64.9–67.1
67.2–70.1
70.2–72.9
73.0–74.9

57.5–61.3
61.4–63.5
63.6–66.3
66.4–69.0
69.1–70.9


CC 112.0
CC 121.0
CC 132.0
CC 143.0

80.8–83.1
83.2–86.0

75.0–77.9
78.0–80.9
81.0–82.9
83.0–86.0

71.0–73.7
73.8–76.5
76.6–78.4
78.5–86.0

CC 156.0
CC 167.0
CC 180.0
CC 196.0

Thermal Unit Table 19
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

43.6–47.3
47.4–51.3
51.4–54.6
54.7–59.7
59.8–65.1

CC 54.5
CC 59.4
CC 64.3
CC 68.5
CC 74.6

65.2–70.1
70.2–75.1
75.2–82.2
82.3–89.2
89.3–96.5

CC 81.5
CC 87.7
CC 94.0

CC 112.0

96.6–104.
105.–113.
114.–123.
124.–133.

CC 121.0
CC 132.0
CC 143.0
CC 156.0

Thermal Unit Table 20
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

133.–148.
149.–174.
175.–195.
196.–219.
220.–239.

B1.30
B1.45
B1.67
B1.88
B2.10

240.–271.
272.–308.
309.–348.
349.–397.
398.–429.

B2.40
B2.65
B3.00
B3.30
B3.70

430.–495.
496.–520.

B4.15
B4.85

Thermal Unit Table 21
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Load

128.–140.
141.–163.
164.–179.
180.–201.
202.–227.

B1.30
B1.45
B1.67
B1.88
B2.10

228.–251.
252.–278.
279.–308.
309.–346.
347.–380.

B2.40
B2.65
B3.00
B3.30
B3.70

381.–426.
427.–454.
455.–489.
490.–520.

B4.15
B4.85
B5.50
B6.25

Thermal Unit Table 22
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

92.0–100.
101.–109.
110.–119.
120.–131.
132.–139.

DD 112.0



DD 150.0

140.–156.
157.–166.
167.–180.
181.–189.
190.–209.

DD 160.0
DD 185.0

DD 220.0

210.–225.
226.–238.
239.–266.

DD 250.0
DD 265.0
DD 280.0

Thermal Unit Table 24
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

88.2–95.1
95.2–101.
102.–111.
112.–119.
120.–131.

DD 112.0



DD 150.0

132.–149.
150.–170.
171.–180.
181.–197.
198.–204.

DD 160.0
DD 185.0
DD 220.0
DD 240.0
DD 250.0

205.–213.
214.–237.
238.–243.
244.–266.

DD 265.0
DD 280.0

Thermal Unit Table 26
(index and instructions: General to Mounting Thermal Units)

Size 7 Type J

Size 8 Type K

Thermal Unit Number

Current Transformer Ratio

120/5

2000/5

Motor FLC

166.–187.
188.–211.
212.–232.
233.–267.
268.–301.

277.–312.
313.–352.
353.–388.
389.–445.
446.–503.

B1.03
B1.16
B1.30
B1.45
B1.67

302.–336.
337.–383.
384.–425.
426.–466.
467.–522.

504.–561.
562.–640.
641.–708.
709.–777.
778.–870.

B1.88
B2.10
B2.40
B2.65
B3.00

523.–587.
588.–656.
657.–764.

871.–978.
979.–1093.
1094.–1215.

B3.30
B3.70
B4.15

Thermal Unit Table 28
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

2 or 3 T.U.

Large
Enclosure

Small
Enclosure

45.3–48.2
48.3–52.4
52.5–56.4
56.5–61.2
61.3–66.1

40.3–42.8
42.9–46.2
46.3–49.8
49.9–54.9
55.0–57.9

CC 64.3
CC 68.5
CC 74.6
CC 81.5
CC 87.7

66.2–71.4
71.5–77.0
77.1–80.7
80.8–87.7
87.8–94.9

58.0–62.5
62.6–67.3
67.4–73.4
73.5–78.9
79.0–84.9

CC 94.0

CC 112.0
CC 121.0
CC 132.0

95.0–102.
103.–110.
111.–117.
118.–133.

85.0–91.0
91.1–97.2
97.3–104.
105.–121.
122.–133.

CC 143.0
CC 156.0
CC 167.0
CC 180.0
CC 196.0

Thermal Unit Table 31
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

0.31–0.35
0.36–0.39
0.40–0.44

B0.44
B0.51
B0.57

0.45–0.50
0.51–0.61
0.62–0.68

B0.63
B0.71
B0.81

0.69–0.73
0.74–0.82
0.83–0.92

B0.92
B1.03
B1.16

0.93–1.03
1.04–1.19
1.20–1.34

B1.30
B1.45
B1.67

1.35–1.50
1.51–1.74
1.75–1.97

B1.88
B2.10
B2.40

1.98–2.14
2.15–2.47
2.48–2.91

B2.65
B3.00
B3.30

2.92–3.31
3.32–3.75
3.76–4.05

B3.70
B4.15
B4.85

4.06–4.94
4.95–5.52
5.53–6.11

B6.25
B6.90
B7.70

6.12–6.52
6.53–7.31
7.32–8.43

B8.20
B9.10
B10.2

8.44–9.83
9.84–10.7
10.8–11.6

B11.5
B12.8
B14.0

11.7–12.9
13.0–14.3
14.4–15.7

B15.5
B17.5
B19.5

15.8–17.8
17.9–20.3
20.4–23.3

B22.0
B25.0
B28.0

23.4–26.6
26.7–30.3
30.4–35.3

B32.0
B36.0
B40.0

35.4–41.5
41.6–45

B45.0
B50.0

Thermal Unit Table 34
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

15.1–16.2
16.3–17.5
17.6–19.1
19.2–20.7
20.8–22.2


CC 22.8
CC 24.6
CC 26.3
CC 28.8

22.3–24.0
24.1–25.7
25.8–27.8
27.9–30.1
30.2–32.5

CC 31.0
CC 33.3
CC 36.4
CC 39.6
CC 42.7

32.6–35.1
35.2–38.0
38.1–41.1
41.2–44.0
44.1–47.2

CC 46.6
CC 50.1
CC 54.5
CC 59.4
CC 64.3

47.3–51.1
51.2–55.8
55.9–59.5
59.6–64.5
64.6–69.5

CC 68.5
CC 74.6
CC 81.5
CC 87.7
CC 94.0

69.6–75.0
75.1–78.1
78.2–82.3
82.4–86.0


CC 112.0
CC 121.0
CC 132.0

Thermal Unit Table 40
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

15.3–16.7
16.8–19.8
19.9–22.8
22.9–25.8
25.9–30.4





30.5–31.9
32.0–34.2
34.3–38.8
38.9–44.2
44.3–50.2





50.3–57.1
57.2–63.2
63.3–68.6
68.7–78.6
78.7–86.0




C 90.0

Thermal Unit Table 41
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

0.81–0.92
0.93–1.07
1.08–1.14
1.15–1.26
1.27–1.49

B1.16
B1.30
B1.45
B1.67
B1.88

1.50–1.73
1.74–1.89
1.90–2.16
2.17–2.37
2.38–2.66

B2.10
B2.40
B2.65
B3.00
B3.30

2.67–2.99
3.00–3.40
3.41–3.94
3.95–4.15
4.16–4.49

B3.70
B4.15
B4.85
B5.50
B6.25

4.50–5.15
5.16–5.77
5.78–6.61
6.62–7.14
7.15–7.97

B6.90
B7.70
B8.20
B9.10
B10.2

7.98–8.15
8.16–9.32
9.33–9.97
9.98–10.7
10.8–12.0

B11.5
B12.8
B14.0
B15.5
B17.5

12.1–13.9
14.0–15.7
15.8–18.4
18.5–21.6
21.7–24.0

B19.5
B22.0
B25.0
B28.0
B32.0

24.1–28.6
28.7–30.7
30.8–33.5
33.6–36.0

B36.0
B40.0
B45.0
B50.0

Thermal Unit Table 43
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

0.41–0.44

0.45–0.49

0.50–0.53

0.54–0.58

0.59–0.65

A .49

A .54

A .59

A .65

A .71

0.66–0.71

0.72–0.78

0.79–0.85

0.86–0.96

0.97–1.04

A .78

A .86

A .95

A 1.02

A  1.16

1.05–1.16

1.17–1.29

1.30–1.37

1.38–1.47

1.48–1.56

A 1.25

A 1.39

A 1.54

A 1.63

A 1.75

1.57–1.65

1.66–1.79

1.80–1.95

1.96–2.15

2.16–2.38

A 1.86

A 1.99

A 2.15

A 2.31

A 2.57

2.39–2.75

2.76–2.84

2.85–3.06

3.07–3.45

3.46–3.70

A 2.81

A 3.61

A 3.95

A 4.32

A 4.79

3.71–4.07

4.08–4.32

4.33–4.90

4.91–5.35

5.36–5.85

A 5.30

A 5.78

A 6.20

A 6.99

A 7.65

5.86–6.41

6.42–6.79

6.80–7.57

7.58–8.15

8.16–8.98

A  8.38

A 9.25

A 9.85

A  11.0

A 11.9

8.99–9.67

9.68–9.95

9.96–10.8

10.9–12.1

12.2–13.1

A 13.2

A 14.1

A 14.8

A 16.2

A 17.9

13.2–13.9

14.0–15.0

15.1–16.0

A 19.8

A 21.3

A 25.2

Thermal Unit Table 44
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

0.34–0.38
0.39–0.43
0.44–0.48
0.49–0.53
0.54–0.62

B0.44
B0.51
B0.57
B0.65
B0.71

0.63–0.69
0.70–0.78
0.79–0.88
0.89–0.99
1.00–1.10

B0.81
B0.92
B1.03
B1.16
B1.30

1.11–1.26
1.27–1.43
1.44–1.59
1.60–1.81
1.82–2.00

B1.45
B1.67
B1.88
B2.10
B2.40

2.01–2.28
2.29–2.52
2.53–2.87
2.88–3.28
3.29–3.75

B2.65
B3.00
B3.30
B3.70
B4.15

3.76–4.27
4.28–4.77
4.78–5.27
5.28–5.91
5.92–6.25

B4.85
B5.50
B6.25
B6.90
B7.70

6.26–6.83
6.84–7.65
7.66–8.55
8.56–9.56
9.57–10.3

B8.20
B9.10
B10.2
B11.5
B12.8

10.4–11.3
11.4–12.4
12.5–14.1
14.2–15.7
15.8–17.9

B14.0
B15.5
B17.5
B19.5
B22.0

18.0–20.1
20.2–22.5
22.6–25.0

B25.0
B28.0
B32.0

Thermal Unit Table 49
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

82.5–88.2
88.3–95.9
96.0–102.
103.–109.
110.–121.

DD 112.0



DD 150.0

122.–139.
140.–154.
155.–163.
164.–175.
176.–184.

DD 160.0
DD 185.0
DD 220.0
DD 240.0
DD 250.0

185.–195.
196.–215.
216.–224.
225.–243.
244.–266.

DD 265.0
DD 280.0


Thermal Unit Table 53
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1 T. U.

3 T. U.

0.31–0.33
0.34–0.36
0.37–0.40
0.41–0.48
0.49–0.57

0.29–0.31
0.32–0.36
0.37–0.38
0.39–0.46
0.47–0.55

B0.44
B0.51
B0.57
B0.63
B0.71

0.58–0.64
0.65–0.70
0.71–0.77
0.78–0.85
0.86–0.99

0.56–0.61
0.62–0.66
0.67–0.75
0.76–0.83
0.84–0.93

B0.81
B0.92
B1.03
B1.16
B1.30

1.00–1.10
1.11–1.28
1.29–1.41
1.42–1.58
1.59–1.80

0.94–1.06
1.07–1.18
1.19–1.31
1.32–1.47
1.48–1.67

B1.45
B1.67
B1.88
B2.10
B2.40

1.81–2.03
2.04–2.25
2.26–2.51
2.52–2.83
2.84–3.29

1.68–1.83
1.84–2.04
2.05–2.38
2.39–2.60
2.61–3.13

B2.65
B3.00
B3.30
B3.70
B4.15

3.30–3.75
3.76–4.22
4.23–4.65
4.66–5.16
5.17–5.53

3.14–3.59
3.60–3.94
3.95–4.19
4.20–4.72
4.73–5.21

B4.85
B5.50
B6.25
B6.90
B7.70

5.54–6.09
6.10–6.80
6.81–7.60
7.61–8.35
8.36–9.00

5.22–5.51
5.52–6.17
6.18–7.00

B8.20
B9.10
B10.2
B11.5
B12.8

Thermal Unit Table 54
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

2 T. U.

3 T. U.

43.6–45.5
45.6–49.6
49.7–53.1
53.2–57.6
57.7–62.4

41.1–43.5
43.6–46.8
46.9–50.0
50.1–54.9
55.0–57.5

CC 64.3
CC 68.5
CC 74.6
CC 81.5
CC 87.7

62.5–67.5
67.6–71.1
71.2–75.9
76.0–81.9
82.0–84.6

57.6–61.8
61.9–66.2
66.3–72.4
72.5–78.1
78.2–80.7

CC 94.0

CC 112.0
CC 121.0
CC 132.0

84.7–90.7
90.8–98.4
98.5–105.
106.–117.
118.–123.

80.8–86.5
86.6–93.9
94.0–100.
101.–112.
113.–117.

CC 143.0
CC 156.0
CC 167.0
CC 180.0
CC 196.0

124.–133.

118.–123.
124.–133.

CC 208.0
CC 219.0

Thermal Unit Table 56
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1 or 2 T. U.

3 T. U.

3.29–3.74
3.75–4.23
4.24–4.68
4.69–5.22
5.23–5.67

3.18–3.40
3.41–3.76
3.77–4.00
4.01–4.57
4.58–5.03

B4.85
B5.50
B6.25
B6.90
B7.70

5.68–6.13
6.14–6.91
6.92–7.70
7.71–8.56
8.57–9.39

5.04–5.32
5.33–5.97
5.98–6.88
6.89–7.82
7.83–8.47

B8.20
B9.10
B10.2
B11.5
B12.8

9.40–10.4
10.5–11.6
11.7–12.9
13.0–14.6
14.7–16.5

8.48–9.15
9.16–10.1
10.2–11.2
11.3–12.0
12.1–13.6

B14.0
B15.5
B17.5
B19.5
B22.0

16.6–18.5
18.6–21.0
21.1–23.6
23.7–26.3
26.4–29.3

13.7–15.2
15.3–17.1
17.2–19.0
19.1–21.5
21.6–24.1

B25.0
B28.0
B32.0
B36.0
B40.0

29.4–35.1
35.2–36.1
36.2–39.1
39.2–41.5
41.6–45.0

24.2–27.0
27.1–28.7
28.8–30.4
30.5–32.2
32.3–35.4

B45.0
B50.0
B56.0
B62.0
B70.0


35.5–38.2
38.3–45.0

B79.0
B88.0

Thermal Unit Table 58
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1 or 2 T. U.

3 T. U.

3.37–3.82
3.83–4.33
4.34–4.79
4.80–5.33
5.34–5.79

3.28–3.51
3.52–3.89
3.90–4.14
4.15–4.73
4.74–5.22

B4.85
B5.50
B6.25
B6.90
B7.70

5.80–6.27
6.28–7.03
7.04–7.88
7.89–8.73
8.74–9.55

5.23–5.53
5.54–6.21
6.22–7.17
7.18–8.19
8.20–8.90

B8.20
B9.10
B10.2
B11.5
B12.8

9.56–10.6
10.7–11.8
11.9–13.1
13.2–14.9
15.0–16.9

8.91–9.57
9.58–10.6
10.7–11.8
11.9–12.7
12.8–14.4

B14.0
B15.5
B17.5
B19.5
B22.0

17.0–18.8
18.9–21.5
21.6–24.1
24.2–26.8
26.9–29.9

14.5–16.1
16.2–18.2
18.3–20.2
20.3–22.8
22.9–25.6

B25.0
B28.0
B32.0
B36.0
B40.0

30.0–35.5
35.6–36.5
36.6–39.6
39.7–41.5
41.6–45.0

25.7–28.8
28.9–30.6
30.7–32.4
32.5–34.6
34.7–38.6

B45.0
B50.0
B56.0
B62.0
B70.0

38.7–45.0

B79.0

Thermal Unit Table 59
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1 or 2 T. U.

3 T. U.

0.34–0.38
0.39–0.43
0.44–0.47
0.48–0.53
0.54–0.60

0.29–0.31
0.32–0.35
0.36–0.38
0.39–0.46
0.47–0.55

B0.44
B0.51
B0.57
B0.63
B0.71

0.61–0.68
0.69–0.76
0.77–0.86
0.87–0.97
0.98–1.07

0.56–0.62
0.63–0.67
0.68–0.75
0.76–0.84
0.85–0.95

B0.81
B0.92
B1.03
B1.16
B1.30

1.08–1.23
1.24–1.39
1.40–1.55
1.56–1.77
1.78–1.96

0.96–1.09
1.10–1.21
1.22–1.35
1.36–1.53
1.54–1.73

B1.45
B1.67
B1.88
B2.10
B2.40

1.97–2.15
2.16–2.41
2.42–2.71
2.72–3.03
3.04–3.53

1.74–1.90
1.91–2.14
2.15–2.34
2.35–2.67
2.68–3.22

B2.65
B3.00
B3.30
B3.70
B4.15

3.54–4.01
4.02–4.56
4.57–5.03
5.04–5.59
5.60–5.95

3.23–3.48
3.49–3.87
3.88–4.14
4.15–4.73
4.74–5.28

B4.85
B5.50
B6.25
B6.90
B7.70

5.96–6.58
6.59–7.31
7.32–8.15
8.16–9.13
9.14–9.91

5.29–5.64
5.65–6.39
6.40–7.43
7.44–8.55
8.56–9.40

B8.20
B9.10
B10.2
B11.5
B12.8

9.92–10.7
10.8–12.1
12.2–13.5
13.6–15.1
15.2–17.0

9.41–10.0
10.1–11.2
11.3–12.5
12.6–13.5
13.6–15.4

B14.0
B15.5
B17.5

B19.5
B22.0

17.1–18.9
19.0–21.5
21.6–24.0
24.1–26.0

15.5–17.5
17.6–19.9
20.0–22.2
22.3–25.5
25.6–26.0

B25.0
B28.0
B32.0
B36.0
B40.0

Thermal Unit Table 61
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

2 T. U.

3 T. U.

46.8–50.0
50.1–54.2
54.3–58.3
58.4–63.6
63.7–68.5

45.3–48.2
48.3–52.4
52.5–56.4
56.5–61.2
61.3–66.1

CC 64.3
CC 68.5
CC 74.6
CC 81.5
CC 87.7

68.6–74.0
74.1–79.8
79.9–83.0
83.1–88.9
89.0–95.6

66.2–71.4
71.5–77.0
77.1–79.0
79.1–84.7
84.8–91.1

CC 94.0

CC 112.0
CC 121.0
CC 132.0

95.7–102.
103.–109.
110.–119.
120.–133.

91.2–98.1
98.2–104.
105.–113.
114.–123.
124.–133.

CC 143.0
CC 156.0
CC 167.0
CC 180.0
CC 196.0

Thermal Unit Table 65
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

0.31–0.35
0.36–0.39
0.40–0.44
0.45–0.50
0.51–0.58

B0.44
B0.51
B0.57
B0.63
B0.71

0.59–0.65
0.66–0.73
0.74–0.82
0.83–0.92
0.93–1.03

B0.81
B0.92
B1.03
B1.16
B1.30

1.04–1.19
1.20–1.34
1.35–1.50
1.51–1.67
1.68–1.89

B1.45
B1.67
B1.88
B2.10
B2.40

1.90–2.14
2.15–2.36
2.37–2.65
2.66–2.97
2.98–3.47

B2.65
B3.00
B3.30
B3.70
B4.15

3.48–3.94
3.95–4.44
4.45–4.94
4.95–5.52
5.53–5.88

B4.85
B5.50
B6.25
B6.90
B7.70

5.89–6.52
6.53–7.31
7.32–8.21
8.22–9.18
9.19–9.90

B8.20
B9.10
B10.2
B11.5
B12.8

10.0–11.0
11.1–12.4
12.5–13.9
14.0–15.7
15.8–17.8

B14.0
B15.5
B17.5
B19.5
B22.0

17.9–20.0
20.1–22.9
23.0–25.0

B25.0
B28.0
B32.0

Following Selections
for Size 2 Only.

23.0–25.7
25.8–28.6
28.7–32.2
32.3–35.8
35.9–40.1

B32.0
B36.0
B40.0
B45.0
B50.0

40.2–44.4
44.5–50.0

B56.0
B62.0

Thermal Unit Table 66
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

0.31–0.32
0.33–0.36
0.37–0.41
0.42–0.49
0.50–0.54

B0.44
B0.51
B0.57
B0.63
B0.71

0.55–0.61
0.62–0.67
0.68–0.76
0.77–0.87
0.88–0.98

B0.81
B0.92
B1.03
B1.16
B1.30

0.99–1.05
1.06–1.25
1.26–1.33
1.34–1.56
1.57–1.71

B1.45
B1.67
B1.88
B2.10
B2.40

1.72–1.97
1.98–2.15
2.16–2.42
2.43–2.78
2.79–3.28

B2.65
B3.00
B3.30
B3.70
B4.15

3.29–3.88
3.89–4.13
4.14–4.43
4.44–4.96
4.97–5.35

B4.85
B5.50
B6.25
B6.90
B7.70

5.36–5.91
5.92–6.79
6.80–7.56
7.57–7.83
7.84–8.09

B8.20
B9.10
B10.2
B11.5
B12.8

8.10–9.51
9.52–10.1
10.2–11.3
11.4–13.1
13.2–14.9

B14.0
B15.5
B17.5
B19.5
B22.0

15.0–16.1
16.2–17.8
17.9–19.1
19.2–22.4
22.5–23.5

B25.0
B28.0
B32.0
B36.0
B40.0

23.6–26.0

B45.0

Thermal Unit Table 67
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

3.79–4.14
4.15–4.44
4.45–5.22
5.23–5.29
5.30–5.99

B5.50
B6.25
B6.90
B7.70
B8.20

6.00–6.82
6.83–7.68
7.69–7.92
7.93–8.47
8.48–9.99

B9.10
B10.2
B11.5
B12.8
B14.0

10.0–10.8
10.9–12.3
12.4–12.9
13.0–15.1
15.2–16.7

B15.5
B17.5
B19.5
B22.0
B25.0

16.8–17.9
18.0–20.1
20.2–23.8
23.9–25.8
25.9–28.3

B28.0
B32.0
B36.0
B40.0
B45.0

28.4–29.6
29.7–32.1
32.2–34.4
34.5–38.3
38.4–39.9

B50.0
B56.0
B62.0
B70.0
B79.0

40.0–45.0

B88.0

Thermal Unit Table 68
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

14.9–16.1
16.2–17.3
17.4–19.5
19.6–20.7
20.8–22.4


CC 22.8
CC 24.6
CC 26.3
CC 28.8

22.5–23.9
24.0–25.8
25.9–27.6
27.7–29.7
29.8–31.8

CC 31.0
CC 33.3
CC 36.4
CC 39.6
CC 42.7

31.9–34.2
34.3–37.0
37.1–39.6
39.7–42.5
42.6–45.0

CC 46.6
CC 50.1
CC 54.5
CC 59.4
CC 64.3

45.1–48.6
48.7–51.2
51.3–56.0
56.1–60.1
60.2–64.3

CC 68.5
CC 74.6
CC 81.5
CC 87.7
CC 94.0

64.4–68.9
69.0–71.9
72.0–75.4
75.5–78.9
79.0–82.1


CC 112.0
CC 121.0
CC 132.0
CC 143.0

82.2–86.0

CC 156.0

Thermal Unit Table 69
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1 or 2 T. U.

3 T. U.

3.46–3.90
3.91–4.44
4.45–4.91
4.92–5.51
5.52–5.84

3.38–3.65
3.66–4.07
4.08–4.36
4.37–5.19
5.20–5.59

B4.85
B5.50
B6.25
B6.90
B7.70

5.85–6.54
6.55–7.33
7.34–8.31
8.32–9.22
9.23–10.0

5.60–5.98
5.99–6.78
6.79–7.91
7.92–9.12
9.13–10.0

B8.20
B9.10
B10.2
B11.5
B12.8

10.1–11.2
11.3–12.5
12.6–14.2
14.3–16.1
16.2–18.4

10.1–10.7
10.8–12.0
12.1–13.5
13.6–14.6
14.7–16.7

B14.0
B15.5
B17.5
B19.5
B22.0

18.5–20.5
20.6–23.2
23.3–26.6
26.7–29.6
29.7–33.5

16.8–18.9
19.0–21.6
21.7–24.1
24.2–27.6
27.7–31.2

B25.0
B28.0
B32.0
B36.0
B40.0

33.6–37.2
37.3–41.5
41.6–45.0

31.3–35.5
35.6–37.8
37.9–41.5
41.6–45.0

B45.0
B50.0
B56.0
B62.0

Thermal Unit Table 72
(index and instructions: General to Mounting Thermal Units)

Motor FLC (A)

Thermal Unit Number

1 T. U.

3 T. U.

2.38–2.62
2.63–2.94
2.95–3.31

2.38–2.62
2.63–2.94
2.95–3.31



3.32–3.43
3.44–3.81
3.82–4.32

3.32–3.43
3.44–3.81
3.82–4.32



4.33–4.75
4.76–5.38
5.39–5.75

4.33–4.75
4.76–5.38
5.39–5.75



5.76–5.97
5.98–6.30
6.31–6.55

5.76–5.97
5.98–6.30
6.31–6.55



6.56–6.89
6.90–7.14
7.15–7.36

6.56–6.89
6.90–7.14
7.15–7.36



7.37–8.30
8.31–8.59
8.60–9.01

7.37–8.30
8.31–8.59
8.60–9.01



9.02–9.68
9.69–9.99
10.0–10.9

9.02–9.68
9.69–9.99
10.0–10.9



11.0–11.3
11.4–12.4
12.5–12.9

11.0–11.3
11.4–12.0



13.0–14.0
14.1–14.5
14.6–15.7





15.8–16.6
16.7–18.0



Following Selections for Size M–1 & M–1P Only.


11.4–12.4
12.5–12.9




13.0–14.0
14.1–14.5
14.6–15.7