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A Textbook on Electric Lighting and Railways: Geometrical Drawing ...
International Correspondence Schools
No preview available - 2013
adjusted allow alternating current alternating-current ammeter amperes annunciator arc lamps arc machines arc-light armature arrangement arrester battery bell brushes burn cable candlepower carrying cent center of distribution circuit circuit-breakers circular mils clutch conductors conduit connected in series constant constant-current constant-potential copper cuit cut-out direct current direct-current distance drop dynamo enclosed arc enclosed-arc lamp feed feeders feet filament fixture flow fuse give globe ground hence illumination incandescent lamps inch installed insulation large number load magnet mains means method motor mounted necessary nected number of lamps open-arc lamp operated ordinary outlet photometer placed plug porcelain pressure reactance regulator resistance rheostat screws series coils short-circuited shown in Fig shows shunt coil side socket standard candle station style supplied switch switchboard temperature terminals three-wire system tion transformers tube two-wire two-wire circuits Underwriters usually voltage voltmeter volts watts
Page 47 - 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.
Page 31 - The insulating lining must be at least one-thirty-second of an inch in thickness, and the materials of which it is composed must be of such a nature as will not have a deteriorating effect on the insulation of the conductor, and be sufficiently tough and tenacious to withstand the abrasion test of drawing long lengths of conductors in and out of same. //. The insulating lining must not be mechanically weak after three days...
Page 45 - ... between all conductors and the ground (not including attachments, sockets, receptacles, etc.) of not less than the following: Up to 5 amperes 4,000,000...
Page 67 - Higid 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.
Page 67 - From the nature of the question the decision as to what is an approved case must be left to the Inspection Department having jurisdiction to determine in each instance.
Page 57 - Shall be run for eight consecutive hours at full load in watts under conditions of service, and at the end of that time the rise in temperature, as measured by the increase of resistance of the primary coil, shall not exceed l:lo degrees Fahrenheit.
Page 66 - Must be insulated on floors or base frames, which must be kept filled to prevent absorption of moisture and also kept clean and dry. Where frame insulation is impracticable, the...
Page 32 - All elbows or bends must be so made that the conduit or lining of same 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.
Page 48 - Where not exposed to moisture or severe mechanical injury, each stranded conductor must have a solid insulation at least one-thirty-second of an inch in thickness, and must show an insulation resistance between conductors, and between either conductor and the ground, of at least one megohm per mile after one week's submersion in water at seventy degrees Fahrenheit and after three minutes' electrification, with 500 volts, and be 97 protected by a slow-burning, tough-braided outer covering.