Size and Approximate Cold Resistances of Various Alloys for Common Wattages

Watts at Operating

Temperatures

NICHROME 80 Ohms at 75 degrees

110-120 220-240

Volts Volts

NICHROME 60 Ohms

at 75 Degrees 110-120

220-240 Volts Volts

RECOMMENDED

A.W.G SIZES

110-120 Volts 220-240 Volts

Watts at Operating

Temperatures

 

100

150

200

250

300

 

123.52

82.347

61.761

49.409

41.174

 

494.09

329.38

247.04

197.64

164.69

 

118.10

78.732

59.050

47.240

39.366

 

472.40

314.93

236.20

188.96

157.46

Max.--Min.

26--30

26--30

25--29

24--28

24---28

Max.--Min.

29--33

29--33

28--32

27--31

27--31

 

100

150

200

250

300

350

400

450

500

550

35.291

30.881

27.449

24.704

22.458

141.16

123.52

109.80

98.817

89.832

33.742

29.525

26.244

23.620

21.472

134.97

118.10

104.98

94.479

85.889

23--27

22--26

20--24

20--24

19--23

26--30

25--29

23--27

23--27

22--26

350

400

450

500

550

600

650

700

750

800

20.586

19.004

17.646

16.468

15.440

83.345

76.016

70.584

65.874

61.766

19.683

18.170

16.871

15.745

14.762

79.730

72.679

67.486

62.982

59.055

19--23

19--23

18--22

18--22

18--22

22--26

22--26

21--25

21--25

21--25

600

650

700

750

800

850

900

950

1000

1050

14.532

13.724

13.002

12.352

11.764

58.128

54.897

52.009

49.409

47.055

13.894

13.122

12.431

11.810

11.247

55.577

52.487

49.726

47.240

44.989

17--21

17--21

17--21

16--20

16--20

20--24

20--24

20--24

19--23

19--23

850

900

950

1000

1050

1100

1150

1200

1250

1300

11.229

10.741

10.2936

9.8817

9.5016

44.918

42.964

41.174

39.527

38.006

10.737

10.270

9.8418

9.4479

9.0845

42.946

41.078

39.367

37.792

36.338

16--20

15--19

15--19

14--18

14--18

19--23

18--22

18--22

17--21

17--21

1100

1150

1200

1250

1300

1350

1400

1450

1500

2000

9.1497

8.8229

8.5188

8.2347

6.1761

37.599

36.292

34.075

32.938

24.704

8.7480

8.4356

8.1449

7.8732

5.9050

35.992

34.743

32.579

31.493

23.619

13--17

13--17

12--16

12--16

10--14

16--20

16--20

15--19

15--19

13--17

1350

1400

1450

1500

2000

2500

3000

4.9409

4.1174

19.764

16.469

4.7240

3.9366

18.896

15.746

9--13

8--12

12--16

11--15

2500

3000

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