American Gauge For Cotton And Silk-Covered And Bare Copper Wire

The resistances are calculated for pure copper wire.

The number of feet to the pound is only approximate for insulated wire.

No.

Diameter.

Feet per Pound.

Resistance, Naked Copper.

Cotton Covered.

Silk Covered.

Naked.

Ohms per 1,000 Feet.

Ohms per Mile.

Feet per Ohm.

Ohms per Pound.

8

.12849

20

.6259

3.3

1600

.0125

9

.11443

25

.7892

4.1

1272

.0197

10

.10189

32

.8441

4.4

1185

.0270

11

.09074

40

1.254

6.4

798

.0501

12

.08081

42

46

50

1.580

8.3

633

.079

13

.07196

55

60

64

1.995

10.4

504

.127

14

.06408

68

75

80

2.504

13.2

400

.200

15

.05707

87

95

101

3.172

16.7

316

.320

16

.05082

110

120

128

4.001

23

230

.512

17

.04525

140

150

161

5.04

26

198

.811

18

.0403

175

190

203

6.36

33

157

1.29

19

.03539

220

240

256

8.25

43

121

2.11

20

.03196

280

305

324

10.12

53

99

3.27

21

.02846

360

390

408

12.76

68

76.5

5.20

22.

.02535

450

490

514

16.25

85

61.8

8.35

23

.02257

560

615

649

20.30

108

48.9

13.3

24

.0201

715

775

818

25.60

135

39.0

20.9

25

.0179

910

990

1,030

32.2

170

31.0

33.2

26

.01594

1,165

1,265

1,300

40.7

214

24.6

52.9

27

.01419

1,445

1,570

1,640

51.3

270

19.5

84.2

28

.01264

1,810

1,970

2,070

64.8

343

15.4

134

29

.01126

2,280

2,480

2,617

81.6

432

12.2

213

30

.01002

2,805

3,050

3,287

103

538

9.8

338

31

.00893

3,605

3,920

4,144

130

685

7.7

539

32

.00795

4,535

4,930

5,227

164

865

6.1

856

33

.00708

6,200

6,590

206

1033

4.9

1357

34

.0063

7,830

8,330

260

1389

3.8

2166

35

.00561

9,830

10,460

328

1820

2.9

3521

36

.005

.........

12,420

13,210

414

2200

2.4

5469