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 6-10 із 100
Сторінка 17
... 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 motor ...
... 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 motor ...
Сторінка 21
... wire at some other point . 4. It is never safe , however , to assume the insulation to be perfect , or that a ground ... wire is not very difficult . Gen- eral custom and considerations of strength require that no wire smaller than No. 8 ...
... wire at some other point . 4. It is never safe , however , to assume the insulation to be perfect , or that a ground ... wire is not very difficult . Gen- eral custom and considerations of strength require that no wire smaller than No. 8 ...
Сторінка 41
... wire ( A. W. G. ) . By the second method ( Fig . 16 ) it would be— R2 : 4 - 10 x .5 ( 400 - 40 ) corresponding to No. 13 wire . R3 = = 4 - .00222 ohm , And by the anti - parallel system - 10 × .5 ( 400 40 + 1 ) which also corresponds to ...
... wire ( A. W. G. ) . By the second method ( Fig . 16 ) it would be— R2 : 4 - 10 x .5 ( 400 - 40 ) corresponding to No. 13 wire . R3 = = 4 - .00222 ohm , And by the anti - parallel system - 10 × .5 ( 400 40 + 1 ) which also corresponds to ...
Сторінка 70
... wire system , which was independently invented by Edison and Hopkinson , has for its object the saving of copper in ... Wire System . in Chapter II . The principle of the three - wire arrangement may be understood by first considering ...
... wire system , which was independently invented by Edison and Hopkinson , has for its object the saving of copper in ... Wire System . in Chapter II . The principle of the three - wire arrangement may be understood by first considering ...
Сторінка 71
... wire , and is usually marked 0 or , the latter symbol represent- ing the fact that it is positive with respect to one conductor and negative with respect to the other . The neutral wire carries no current if the system is exactly ...
... wire , and is usually marked 0 or , the latter symbol represent- ing the fact that it is positive with respect to one conductor and negative with respect to the other . The neutral wire carries no current if the system is exactly ...
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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.