B.W.G Ohms Lbs.
No. per lb. per Ohm.
0000 .000080272 12457.5
000 .000104529 9566.7
00 .000163553 6114.24
0 .000255196 3918.58
1 .00042102 2375.18
2 .00052422 1907.59
3 .00075786 1319.50
4 .0010629 940.844
5 .0014558 686.911
6 .0020082 497.96
7 .00324863 307.822
8 .00460101 217.343
9 .00710791 140.689
10 .0105772 94.543
11 .0164462 60.842
12 .0241593 41.392
13 .0418692 23.8839
14 .0718583 13.9163
15 .126788 7.8872
16 .191045 5.2344
17 .301355 3.31835
18 .59157 1.6904
19 1.09596 .912445
20 2.27254 .44003
21 3.25229 .30748
22 5.54843 .18023
23 8.73035 .11454
24 14.5579 .068691
25 21.3142 .046917
26 32.4863 .030782
27 52.0367 .019217
28 88.7724 .011265
29 119.404 .008375
30 164.4762 .0060804
PURE COPPER weighs 555 lbs. per cubic foot. The Resistance of 1 mil.
foot at 60° Fahr. is, according to Dr. Matthiessen, 10.32311 ohms. Upon
these data the above Table has been calculated.
The _Resistance_ of Copper varies with the temperature about 0.38 per
cent. per degree Centigrade, or 0.21 per cent. per degree Fahrenheit.
STRANDED WIRES.--With a conductor of a definite lenght, made of
_Stranded_ Wires, the total _weight_ is _greater_, and the _Resistance
less_ than is a similar length of Conductor with Wires _not_ Stranded.
To convert--Inches to Millimetres multiply by 25.3994
Feet to Metres " .3048
Yards to Metres " .9144
Miles to Kilometres " .6214
Pounds to Kilogrammes " .45359
PEPARED BY WALTER T. GLOVER & CO., ELECTRICAL WIRE AND CABLE MAKERS, 25,
BOOTH STREET MANCHESTER.
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