Telephone Lines And Methods of Constructing Them Overhead And Underground
Telephone Lines And Methods of Constructing Them Overhead And Underground
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To quickly assess the difficulty of the text, read a short excerpt:
2-B80 Gutta Percha .
. 2462 Ebonite .
. 2-284 India Rubber .
. 2-220 Paraffin .
1 J 1 _ J • _ • 1 . 1-994 * t 1 The electrostatic capacity of a cable varies in- versely as the square of the distance between the wires, directly in proportion to their area, and directly as the specific inductive capacity of the substance used in its manufacture as a dielectric. This means that the best results will be obtained with a cable in which the wires are kept as far apart as possible by an insulating medi...um having the lowest specific in- ductive capacity, and by the wires being of small diameter and low resistance.
184 TELEPHONE LINES, [bHAP, These qualifications being most nearly attained in cables in which paper and dry air are the insulating medium employed, this type technically known as ^^ Dry Core " is now universally employed in prefer- ence to any other. Cables insulated with rubber, gutta-percha, and other substances are however still in use in many places in considerable numbers. The number of wires in an overhead cable should not be so great as to make it excessively heavy and unwieldly.
What to read after Telephone Lines And Methods of Constructing Them Overhead And Underground?
You can find similar books in the "Read Also" column, or choose other free books by Walter C Owen to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
2-B80 Gutta Percha .
. 2462 Ebonite .
. 2-284 India Rubber .
. 2-220 Paraffin .
1 J 1 _ J • _ • 1 . 1-994 * t 1 The electrostatic capacity of a cable varies in- versely as the square of the distance between the wires, directly in proportion to their area, and directly as the specific inductive capacity of the substance used in its manufacture as a dielectric. This means that the best results will be obtained with a cable in which the wires are kept as far apart as possible by an insulating medi...um having the lowest specific in- ductive capacity, and by the wires being of small diameter and low resistance.
184 TELEPHONE LINES, [bHAP, These qualifications being most nearly attained in cables in which paper and dry air are the insulating medium employed, this type technically known as ^^ Dry Core " is now universally employed in prefer- ence to any other. Cables insulated with rubber, gutta-percha, and other substances are however still in use in many places in considerable numbers. The number of wires in an overhead cable should not be so great as to make it excessively heavy and unwieldly.
What to read after Telephone Lines And Methods of Constructing Them Overhead And Underground?
You can find similar books in the "Read Also" column, or choose other free books by Walter C Owen to read onlineMoreLess
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