Power Supply and Wiring

Section 6 (continued)

Conduit, Wire and Fuse Sizing

The use of metal conduit with metal conduit connectors is recommended for all electrical connections. Use the NEC or CEC to determine the required conduit size for the application.

Refer to the chart below for the minimum allowable wire size for each controller. Note that these wire sizes are not adjusted for voltage drop due to long cable lengths. Refer to the wire sizing chart in the appendix to determine the maximum length for the input cable. Refer to the motor manual for maximum output cable length. The maximum recommended voltage drop on both input and output cable combined is 5%. Standard wire sizing charts give maximum cable lengths for only input or output cables. Because of this the lengths given in the table must be adjusted so the total voltage drop does not exceed 5%. For example, if the input wire sizing chart in the appendix gives the maximum length of 400' and only 100' is used then only 25% of the total voltage drop (1.25% drop) is used. The maximum output cable length read from the motor‘s wire sizing chart must then be adjusted to 75% of its value so that the maximum voltage drop of 5% is not exceeded.

Use only fast acting class T fuses. The wire used for the input power connections on models SPD20300 and SPD20300F must have a temperature rating of 90ºC minimum. All other wire must be rated 75 ºC minimum. The chart below shows the recommended sizes for wire and fuses for each controller. Note that the wire sizes were not adjusted for voltage drop due to long cable lengths.

 

Maximum Ambient Temperature

 

 

 

20ºC

 

30ºC

 

40ºC

 

50ºC

 

 

 

 

 

 

Generator

Input

 

Output

Input

 

Output

Input

 

Output

Input

 

Output

Voltage

Frame

Model

Full Load

Nominal

Fuse

Size

Cable

 

Cable

Cable

 

Cable

Cable

 

Cable

Cable

 

Cable

 

Size

Number

Output Current

HP

Size

(VA)

Min. AWG

Min. AWG

Min. AWG

Min. AWG

Min. AWG

Min. AWG

Min. AWG

Min. AWG

 

1

SPD20050

17.8

5.0

30.0

7700

10

 

14

10

 

14

10

 

12

8

 

12

 

SPD20050F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPD20075

26.4

7.5

40.0

11400

8

 

12

8

 

10

8

 

10

6

 

8

 

2

SPD20075F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPD20100

37.0

10.0

50.0

16000

8

 

10

8

 

8

6

 

8

4

 

8

 

 

 

 

 

 

 

 

SPD20100F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPD20150

47.4

15.0

70.0

20500

4

 

8

4

 

8

4

 

6

3

 

6

230

3

SPD20150F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPD20200

60.6

20.0

80.0

26200

4

 

6

4

 

6

4

 

4

2

 

4

 

 

 

 

 

 

 

 

SPD20200F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPD20250

76.0

25.0

110.0

32800

2

 

4

2

 

4

1

 

3

1/0

 

2

 

4

SPD20250F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPD20300

94.0

30.0

135.0

40600

2*

 

3

1*

 

3

1*

 

2

1/0*

 

1

 

 

 

 

 

 

 

 

SPD20300F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPD40050

8.9

5.0

15.0

7700

14

 

14

14

 

14

14

 

14

14

 

14

 

1

SPD40050F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPD40075

13.2

7.5

20.0

11400

12

 

14

12

 

14

12

 

14

10

 

14

 

 

 

 

 

 

 

 

SPD40075F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPD40100

18.5

10.0

30.0

16000

10

 

14

10

 

14

10

 

12

8

 

12

 

 

SPD40100F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

460

2

SPD40150

23.7

15.0

40.0

20500

8

 

12

8

 

12

8

 

10

6

 

10

SPD40150F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPD40200

30.3

20.0

50.0

26200

8

 

10

8

 

10

6

 

10

4

 

8

 

 

SPD40200F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPD40250

37.5

25.0

60.0

32400

6

 

8

6

 

8

4

 

8

4

 

8

 

3

SPD40250F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPD40300

47.0

30.0

70.0

40600

4

 

8

4

 

8

4

 

6

3

 

6

 

 

 

 

 

 

 

 

SPD40300F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

* 90ºC Wire Required on input to controller.

13

Page 13
Image 13
ITT IM213 manual Conduit, Wire and Fuse Sizing, 20ºC 30ºC 40ºC 50ºC

IM213 specifications

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