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 2
... diameter or cross - section of the wire . For this purpose the word mil has been introduced , being a short name for one thousandth of an inch . That is to say , a wire 100 mils in diameter is one hundred one thousandths , or one tenth ...
... diameter or cross - section of the wire . For this purpose the word mil has been introduced , being a short name for one thousandth of an inch . That is to say , a wire 100 mils in diameter is one hundred one thousandths , or one tenth ...
Сторінка 3
... diameter or thickness in mils , that is , thousandths of an inch . Materials for Electrical Conductors . Copper is the material employed almost universally for electrical conductors , on account of its high conductivity . The slight ...
... diameter or thickness in mils , that is , thousandths of an inch . Materials for Electrical Conductors . Copper is the material employed almost universally for electrical conductors , on account of its high conductivity . The slight ...
Сторінка 5
... diameter in mils . The latter is easily deter- mined with accuracy by means of the ordinary screw micrometer . A very simple and convenient rule to remember is the fact . that 1,000 feet of No. 10 A. W. G. wire , which is practically ...
... diameter in mils . The latter is easily deter- mined with accuracy by means of the ordinary screw micrometer . A very simple and convenient rule to remember is the fact . that 1,000 feet of No. 10 A. W. G. wire , which is practically ...
Сторінка 8
... diameters of the B. & S. or A. W. G. wires are obtained from the geometrical series in which No. 0000 0.4600 inch and No. 36 = 0.005 inch , the nearest fourth significant digit being retained in the areas and diameters so deduced . It ...
... diameters of the B. & S. or A. W. G. wires are obtained from the geometrical series in which No. 0000 0.4600 inch and No. 36 = 0.005 inch , the nearest fourth significant digit being retained in the areas and diameters so deduced . It ...
Сторінка 9
... diameter has no appreciable resistence is quite fallacious . For example , a bar of copper one foot long and one inch in diameter has about one hundred - thousandth of an ohm re- sistance . While this may be a negligible amount in most ...
... diameter has no appreciable resistence is quite fallacious . For example , a bar of copper one foot long and one inch in diameter has about one hundred - thousandth of an ohm re- sistance . While this may be a negligible amount in most ...
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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 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 operation ordinary parallel phase pipe placed pole polyphase polyphase systems porcelain practically pressure primary produced reactance regulation represented in Fig resistance rheostat rotary rotary converters secondary circuit secondary coils 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.