Okonite wire and cable - physical & mechanical properties of cable conductors - breaking strength of bare copper and aluminum wire conductors
General Conductor Information
Physical/Mechanical Properties

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Mechanical & Physical Properties of
Conductor Materials (Average Values)

 

COPPER

ALUMINUM

Melting PointF
Melting PointC

1981
1083

1215
657

Density, lb/cu. in
Tensile Strength, ksi

0.323
35

0.0977
15

Thermal Conductivity @ 68F
Btu/sq. ft./ft./hr./F

224

135

Electrical Resistivity @ 68F
ohm-cir mil/ft

10.37

16.96

Linear Coeficient of Expansion
(68-212F) micro in./in.F

9.4

13.1

Special Heat
Btu/lb.F

0.092

0.215

 

Breaking strength
Bare copper and aluminum wire

Size
AWG

HARD DRAWN

MEDIUM HARD DRAWN COPPER
3/4 HARD DRAWN ALUMINUM

SOFT ANNEALED COPPER
HALF HARD ALUMINUM

Approx.
Breaking Weight
in Pounds

Breaking Weight
in Pounds

Approx.
Breaking Weight
in Pounds

Min.

Avg.

Max.

CU

AL

CU

AL

CU

AL

CU

AL

CU

AL

18..
16
..
14
..

12..
10
..
9
..

8..
6
..
4
..

3..
2
..
1
..

1/0..
2/0
..
3/0
..

4/0..

85...
135..
213
..

337..
529
..
661
..

826..
1281
..
1970
..

2439..
3003
..
3687
..

4518..
5518
..
6722
..

8144..

32...
54
...
92
...

144...
212
...
262
...

324...
495
...
768
...

971...
1225
...
1542
...

1950...
2460
...
3100
...

3900...

68..
106
..
167
..

262..
410
..
514
..

644..
1010
..
1580
..

1984..
2450
..
3024
..

3730..
4598..
5677
..

6980..

22.
32
.
55
.

87.
139
.
175
.

221.
351
.
545
.

703.
885
.
1120
.

1410.
1780
.
2240
.

2830.

72..
113
..
178
..

279..
439
..
550
..

689..
1082
..
1697
..

2129..
2632
..
3254
..

4020..
4964
..
6166
..

7562..

25.
38
.
65
.

103.
163
.
206
.

260.
412
.
640
.

826.
1040
.
1315
.

1660.
2100
.
2640
.

3320.

77..
120
..
..189..

297..
468
..
586
..

735..
1155
..
1814
..

2274..
2815
..
3484
..

4310..
5330
..
6590
..

8144..

28.
42
.
72
.

113.
180
.
226
.

286.
454
.
705
.

910.
1145
.
1450
.

1825.
2305
.
2900
.

3660.

49.........
78
.........
124
.........

197.........
314
.........
380
.........

480.........
763
.........
1213
.........

1530.........
1929
.........
2432
.........

2984.........
3762
.........
4745
.........

5983.........

22.....
33
.....
57
.....

90.....
143
.....
180
.....

228.....
361
.....
560
.....

724.....
912
.....
1150
.....

1451.....
1831
.....
2305
.....

2910.....

 


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