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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Результати 1-5 із 100
Сторінка 2
... wire may be stated either in terms of the numbers of an arbitrary gauge , or the actual diameter in fractions of an ... two dimensions . For measuring wires or conductors , a wire gauge or a microm- * Wheeler's Chart of Wire Gauges ...
... wire may be stated either in terms of the numbers of an arbitrary gauge , or the actual diameter in fractions of an ... two dimensions . For measuring wires or conductors , a wire gauge or a microm- * Wheeler's Chart of Wire Gauges ...
Сторінка 17
... Two - wire incandescent and arc lighting ( about 110 or 220 volts ) . 12. Three - wire incandescent and arc lighting ( about 220 or 440 volts ) . 13. Five - wire incandescent and arc lighting ( about 440 volts ) . 14. Two - wire with ...
... Two - wire incandescent and arc lighting ( about 110 or 220 volts ) . 12. Three - wire incandescent and arc lighting ( about 220 or 440 volts ) . 13. Five - wire incandescent and arc lighting ( about 440 volts ) . 14. Two - wire with ...
Сторінка 20
... two points on the circuit will have a difference of potential equal to fifty volts , multiplied by the number of ... wire at point he will receive a barely perceptible shock , due to 100 volts , since there are two lamps between that ...
... two points on the circuit will have a difference of potential equal to fifty volts , multiplied by the number of ... wire at point he will receive a barely perceptible shock , due to 100 volts , since there are two lamps between that ...
Сторінка 34
... two mains is a constant . As a matter of fact , however , the middle lamps ... wire , weighing only -800 - ft . No.7 . Resis . Current- Drop .1 OHM .1 1 .1 ... wire , weighing 1,025 lbs . , in Fig . 13 . These examples show the great ...
... two mains is a constant . As a matter of fact , however , the middle lamps ... wire , weighing only -800 - ft . No.7 . Resis . Current- Drop .1 OHM .1 1 .1 ... wire , weighing 1,025 lbs . , in Fig . 13 . These examples show the great ...
Сторінка 38
... wire , having 0.5 ohm resistance . Consequently the drop is five volts for all , since each group takes 10 amperes ... two mains at the feeding - points ; i and i ' , the currents in the two mains at the point ; V and 7 % , the ...
... wire , having 0.5 ohm resistance . Consequently the drop is five volts for all , since each group takes 10 amperes ... two mains at the feeding - points ; i and i ' , the currents in the two mains at the point ; V and 7 % , the ...
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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.