International Library of Technology: A Series of Textbooks for Persons Engaged in the Engineering Professions and Trades, Or for Those who Desire Information Concerning ThemInternational Textbook Company, 1902 |
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International Library of Technology: A Series of Textbooks ..., Том 39,Частина 2 Повний перегляд - 1908 |
Загальні терміни та фрази
adjusted allow alternating current alternating-current ammeter amount ampere-hours amperes arc lamps armature arrangement battery become brushes burn cables candlepower carbon cells charged circular mils clutch compound-wound conductor connected in series constant constant-potential copper cross-section current flows cut-out delivered direct current direct-current discharge distance distribution drop dynamo Electric enclosed arc enclosed-arc lamp engines equal example feeders filament fuse give globe ground hence incandescent lamps inch indicated induction motors insulation large number light lightning arresters line wire load machines magnet main switch means meter method motor necessary nected number of lamps open-arc lamp operated ordinary parallel phase placed plants plates plug pole pressure primary regulator resistance rheostat secondary self-induction series coils short circuit shown in Fig shows shunt coils side single-phase station supplied switchboard synchronism terminals three-phase three-wire system tion transformers tube two-phase usually voltage voltmeter volts watt-hours wattmeter watts
Популярні уривки
Сторінка 4 - The American Institute of Electrical Engineers; The American Society of Mechanical Engineers; The American Society of Civil Engineers; The American Society of Mining and Metallurgical Engineers; and The American Society for Testing Materials.
Сторінка 38 - ... b. Must always be placed in dry, accessible places, and be grouped as far as possible. Knife switches must be so placed that gravity will tend to open : rather than close the switch.
Сторінка 19 - Rigid supporting requires under ordinary conditions, where wiring along flat surfaces, supports at least every four and one-half feet. If the wires are liable to be disturbed, the distance between supports should be shortened. In buildings of mill construction, mains of No.
Сторінка 53 - All elbows or bends must be so made that the conduit will not be injured. The radius of the curve of the inner edge of any elbow not to be less than three and one-half inches.
Сторінка 69 - Stranded wires (except in flexible cords) must be soldered before being fastened under clamps or binding screws, and whether stranded or solid, when they have a conductivity greater than that of No. 8 B. & S.
Сторінка 20 - Must be so spliced or joined as to be both mechanically and electrically secure without solder. The joints must then be soldered, to insure preservation, and covered with an insulation equal to that on the conductors.
Сторінка 68 - ... 12,500 All cut-outs and safety devices in place in the above. Where lamp sockets, receptacles and electroliers, etc., are connected, one-half of the above will be required.
Сторінка 50 - ... b. Each stranded conductor must have a carrying capacity equivalent to not less than a No. 18 B. & S. gauge wire. c. The covering of each stranded conductor must be made up as follows : 1. A tight, close wind of fine cotton. 2. The insulation proper, which shall be either waterproof or slowburning.
Сторінка 36 - Must be placed at every point where a change is made in the size of the wire (unless the cut-out in the larger wire will protect the smaller).
Сторінка 39 - Cut-outs should operate successfully under the most severe conditions they are liable to meet with in practice, on short circuits, with fuses rated at 50 per cent above, and with a voltage 25 per cent above, the current and voltage for which they are designed.