Wire in Electrical Construction |
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... given , so that the user can deter- mine at once the basis from which the table was calcu- lated . A considerable amount of work has been done in testing samples to determine the proper constants . In many cases this has taken more time ...
... given , so that the user can deter- mine at once the basis from which the table was calcu- lated . A considerable amount of work has been done in testing samples to determine the proper constants . In many cases this has taken more time ...
Page 1
... given in 1890 by the United States Coast and Geodetic Survey , Office of Standard Weights and Measures . These values in all the tables are marked by an asterisk ( * ) . The other equivalents are calculated from these . In the metric ...
... given in 1890 by the United States Coast and Geodetic Survey , Office of Standard Weights and Measures . These values in all the tables are marked by an asterisk ( * ) . The other equivalents are calculated from these . In the metric ...
Page 16
... given in the second table . In the table for B. & S. G. , the actual sizes to which wire is drawn , are used . In many cases the nearest whole number of pounds is taken when the variation is less than that found in actual weights of ...
... given in the second table . In the table for B. & S. G. , the actual sizes to which wire is drawn , are used . In many cases the nearest whole number of pounds is taken when the variation is less than that found in actual weights of ...
Page 17
John A. Roebling's Sons Company. by diameter is given by the first formula , and by weight by the second . alk alk C = d2 R. R to = d2 . b 12 c b 12 c C = R to - w R. W. Here , a is the resistance of a mil - foot in same units as R , k ...
John A. Roebling's Sons Company. by diameter is given by the first formula , and by weight by the second . alk alk C = d2 R. R to = d2 . b 12 c b 12 c C = R to - w R. W. Here , a is the resistance of a mil - foot in same units as R , k ...
Page 24
... given to the wire will be reck- oned by means of an ink mark which forms a spiral on the wire during torsion , the full number of twists to be visible between the vises . " According to the above table , the mile - ohm of copper ...
... given to the wire will be reck- oned by means of an ink mark which forms a spiral on the wire during torsion , the full number of twists to be visible between the vises . " According to the above table , the mile - ohm of copper ...
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Common terms and phrases
anode B. A. units Breaking weight British standard British thermal unit C. G. S. system Centigrade centum Circular mils coefficient conductor copper COPPER WIRE COPPER WIRE.-(Cont core Cubic centimeters cubic foot Deflections in decimal degree Centigrade Diameters in mils Diameters of wires electrical electro-motive force Fahrenheit feet in International Fluid ounce formulæ galvanized strand German silver grams HARD-DRAWN COPPER INSULATION RESISTANCE international ampere International ohms Joule Kilograms Legal ohms Long tons Magnet wire Matthiessen MEASURES mercury at 32 meter-gram metric system mil-foot Mile-ohm at 60 Names of units Numbers of wires Office wire Ounces avoirdupois Platinum Pounds on square pounds per square PROPERTIES OF COPPER resistance per mile rise in temperature rubber wire S. G. Insulated Sharpe gauge silver voltameter Spans in feet specific gravity square inch Square millimeters Square mils temperature coëfficient tional ohms triple braid watt weight per foot Weights per mile WIRE GAUGES wires in strands
Popular passages
Page 14 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 10° units of resistance of the cgs system of electromagnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice 14.4521 grams in mass, of a constant crosssectional area and of the length of 106.3 cmsAmpere.
Page 15 - As a unit of quantity, the international coulomb, which is the quantity of electricity transferred by a current of one international ampere in one second. As a unit of capacity, the international farad, which is the capacity of a condenser charged to a potential of one international volt by one international coulomb of electricity. As a unit of work, the joule, which is equal to 10...
Page 14 - As a unit of current, the international ampere, which is onetenth of the unit of current of the CGS system of electromagnetic units, and which is represented sufficiently well for practical use by the unvarying current which, when passed through a solution of nitrate of silver in water, and in accordance with accompanying specifications deposits silver at the rate of Q.001118 of a gram per second.
Page 15 - The liquid should consist of a neutral solution of pure silver nitrate, containing about 15 parts by weight of the nitrate to 85 parts of water. The resistance of the voltameter changes somewhat as the current passes. To prevent these changes having too great an effect on the current, some resistance besides that of the voltameter should be inserted in the circuit.
Page 15 - ... As a unit of electromotive force, the international volt, which is the electromotive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of one international ampere, and which is represented sufficiently well for practical use by \\\% of the electromotive force between the poles or electrodes of the voltaic cell known as Clark's cell, at a temperature of 15° C., and prepared in the manner described in the accompanying specification...
Page 36 - Ibs. each. 7. The wire must be well galvanized and capable of standing the following test : The wire will be plunged into a saturated solution of sulphate of copper, and permitted to remain one minute, and then wiped clean. This process will be performed four times. If the wire appears black after the fourth immersion, it shows that the...
Page 15 - IOT units of work in the cgs system, and which is represented sufficiently well for practical use by the energy expended in one second by an international ampere in an international ohm. " As a unit of power, the watt, which is equal to 10...
Page 15 - As a unit of electromotive force, the international volt, which is the electromotive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of one international ampere, and which is represented sufficiently well for practical use by ^2.
Page 14 - In the following specification the term silver voltameter means the arrangement of apparatus by means of which an electric current is passed through a solution of nitrate of silver in water. The silver voltameter measures the total electrical quantity which has passed during the time of the experiment, and by noting this time the time average of the current, or, if the current has been kept constant, the current itself can be deduced.
Page 15 - Henry, which is the induction in a circuit when the electro-motive force induced in this circuit is one international volt while the inducing current varies at the rate of one Ampere per second.