Electric Lighting: A Practical Exposition of the Art, for the Use of Engineers, Students, and Others Interested in the Installation Or Operation of Electrical Plants, Том 2D. Van Nostrand Company, 1901 |
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Сторінка
... given considerable attention . An appendix , containing the National Electrical Code , and another the Report of the Com- mittee on Standardization are included , these being the rules which must , or at least should be , followed in ...
... given considerable attention . An appendix , containing the National Electrical Code , and another the Report of the Com- mittee on Standardization are included , these being the rules which must , or at least should be , followed in ...
Сторінка
... given in full in Appendix II . The author is glad to take this opportunity to thank many friends for information and assistance . Messrs . J. W. Lieb , C. W. Rice , and P. Torchio of New York , and Mr. W. S. Barstow of Brooklyn , kindly ...
... given in full in Appendix II . The author is glad to take this opportunity to thank many friends for information and assistance . Messrs . J. W. Lieb , C. W. Rice , and P. Torchio of New York , and Mr. W. S. Barstow of Brooklyn , kindly ...
Сторінка 2
... given . Unfortunately the practice of using wire gauges has existed from time immemorial , and results in much confusion because of the great number of different gauges . * This has been overcome to a certain extent in this country by ...
... given . Unfortunately the practice of using wire gauges has existed from time immemorial , and results in much confusion because of the great number of different gauges . * This has been overcome to a certain extent in this country by ...
Сторінка 5
... given on page 8. The resistance of any copper wire at 20 de- grees C. or 68 degrees Fahr . , according to Matthiessen's standard , 10.35 / may be calculated by the following simple formula : R = d2 R being the resistance in ...
... given on page 8. The resistance of any copper wire at 20 de- grees C. or 68 degrees Fahr . , according to Matthiessen's standard , 10.35 / may be calculated by the following simple formula : R = d2 R being the resistance in ...
Сторінка 6
... given by Mat- CC ( 1.0038701 + .000009009 / 2 ) , ( 1 ) in which C , is the conductivity at any temperature t in Centigrade degrees , and C , is the conductivity at zero degrees C. This ex- pression is sometimes converted into one for ...
... given by Mat- CC ( 1.0038701 + .000009009 / 2 ) , ( 1 ) in which C , is the conductivity at any temperature t in Centigrade degrees , and C , is the conductivity at zero degrees C. This ex- pression is sometimes converted into one for ...
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Electric Lighting: A Practical Exposition of the Art, for the Use of ... Francis Bacon Crocker Попередній перегляд недоступний - 2016 |
Загальні терміни та фрази
alternating current amperes apparatus arc lamps armature arrangement bulb bus bars cable candle-power capacity carbon cent circular mils conductors conduit connected constant current constant potential copper loss core cross-arm cross-section cut-out device diameter difference direct current distribution drop dynamo effect efficiency electric lighting electrical conductors employed energy equal fact feeders feeding-points filament flow frequency full load fuse globe ground heat hence incandescent lamps inch inclosed arc increase inductance insulation iron joint latter length less machines magnetic maximum mechanical metal meter method motor number of lamps ohms one-half open arc operation ordinary parallel phase pipe placed pole polyphase porcelain practically pressure primary produced reactance regulation represented in Fig resistance rheostat rotary rotary converters secondary circuit shown in Fig shunt side single-phase socket supplied switch temperature terminal three-phase three-wire system tion transformers tube two-phase two-wire two-wire circuit usually voltage volts wattmeter watts winding
Популярні уривки
Сторінка 460 - The lower limit is specified for rubber-covered wires to prevent gradual deterioration of the high insulations by the heat of the wires, but not from fear of igniting the insulation. The question of drop is not taken into consideration in the above tables.
Сторінка 11 - W, we find that the most economical area of conductor is that for which the annual cost of energy wasted is equal to the annual interest on that portion of the capital outlay which can be considered to be proportional to the weight of metal used. Professor George Forbes, in his Cantor Lecture, on " The Distribution of Electricity...
Сторінка 459 - Must be so placed in wet places that an air space will be left between conductors and pipes in crossing, and the former must be run in such a way that they cannot come in contact with the pipe accidentally. Wires should be run over, rather than under, pipes upon which moisture is likely to gather or which, by leaking, might cause trouble on a circuit.