Wire in Electrical Construction |
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Page 24
... cent . , taking the value of the mile - ohm of 100 per cent . copper as 859 . 8 B. W. G. 62 100 152 97 99999 88888 24 JOHN A. ROEBLING'S SONS CO . Hard-drawn copper wire: British Post-office specifications.
... cent . , taking the value of the mile - ohm of 100 per cent . copper as 859 . 8 B. W. G. 62 100 152 97 99999 88888 24 JOHN A. ROEBLING'S SONS CO . Hard-drawn copper wire: British Post-office specifications.
Page 25
... . Actual Per square inch . Maximum . Minimum . Required . Minimum . Twists in six inches . tion in five feet . Per cent . elonga- Circular mils . 1 7 12 19 27 37 48 JOHN A. ROELLING'S SONS CO . 25 Telephone specifications.
... . Actual Per square inch . Maximum . Minimum . Required . Minimum . Twists in six inches . tion in five feet . Per cent . elonga- Circular mils . 1 7 12 19 27 37 48 JOHN A. ROELLING'S SONS CO . 25 Telephone specifications.
Page 27
... cent . of that of pure copper . The percentage of copper and steel may vary a trifle , hence the strength and weight must be ap- proximate . CO STRANDS OF COPPER WIRE . OPPER WIRES are laid JOHN A. ROEBLING'S SONS CO . 27 Bi-metallic wire.
... cent . of that of pure copper . The percentage of copper and steel may vary a trifle , hence the strength and weight must be ap- proximate . CO STRANDS OF COPPER WIRE . OPPER WIRES are laid JOHN A. ROEBLING'S SONS CO . 27 Bi-metallic wire.
Page 28
... cent . heavier than a solid wire of the same circular milage , while the resistance is calculated for the solid wire . In specifying how a strand shall be made , the number of wires to be used or the diameter of each wire may be given ...
... cent . heavier than a solid wire of the same circular milage , while the resistance is calculated for the solid wire . In specifying how a strand shall be made , the number of wires to be used or the diameter of each wire may be given ...
Page 36
... cent . without breaking , after being galva- nized . " 2. Great tensile strength is not required , but the wire must not break under a less strain than two and one- half times its weight in pounds per mile . " 3. Tests for ductility ...
... cent . without breaking , after being galva- nized . " 2. Great tensile strength is not required , but the wire must not break under a less strain than two and one- half times its weight in pounds per mile . " 3. Tests for ductility ...
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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.