Electric Wiring for the Use of Architects, Underwriters, and the Owners of BuildingsMacmillan and Company, 1896 - 183 стор. |
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Результати 1-5 із 79
Сторінка 11
... lamp is usually either 50 or 110 volts . The pressure used in electric - railway work is nearly always 500 volts . The current through an incandescent lamp when made for a pressure of 50 volts is about 1 ampère ; when made for a ...
... lamp is usually either 50 or 110 volts . The pressure used in electric - railway work is nearly always 500 volts . The current through an incandescent lamp when made for a pressure of 50 volts is about 1 ampère ; when made for a ...
Сторінка 12
... lamp when it is of 2000 nominal candle - power , is about 10 ampères . The resistance of a copper wire .01 inch in diam- eter and 10 feet long is almost exactly 1 ohm . The resistance of a German silver wire .01 inch in diameter and ...
... lamp when it is of 2000 nominal candle - power , is about 10 ampères . The resistance of a copper wire .01 inch in diam- eter and 10 feet long is almost exactly 1 ohm . The resistance of a German silver wire .01 inch in diameter and ...
Сторінка 13
... lamp , motor , or other device operated . A current of electricity , however small , will heat in some degree a wire of any size , and if the current be large and the wire small this heat may become of great intensity . The effect is ...
... lamp , motor , or other device operated . A current of electricity , however small , will heat in some degree a wire of any size , and if the current be large and the wire small this heat may become of great intensity . The effect is ...
Сторінка 15
... lamp or motor . It is partly because of these facts , that wires of in- adequate size are so often used . The total resistance may not be sufficient to absorb an appreciable part of the force and so affect the lamps or motor , but the ...
... lamp or motor . It is partly because of these facts , that wires of in- adequate size are so often used . The total resistance may not be sufficient to absorb an appreciable part of the force and so affect the lamps or motor , but the ...
Сторінка 16
... lamp . The effect of the rules is to limit the loss , or heat , per foot . There might be a very small loss per foot ... lamps must be made negligible . To this end the wire must be chosen with regard to both the distance and 16 ELECTRIC ...
... lamp . The effect of the rules is to limit the loss , or heat , per foot . There might be a very small loss per foot ... lamps must be made negligible . To this end the wire must be chosen with regard to both the distance and 16 ELECTRIC ...
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Electric Wiring for the Use of Architects, Underwriters, and the Owners of ... Russell Robb Попередній перегляд недоступний - 2016 |
Загальні терміни та фрази
air-space alternating currents ampères approved arc lamp arc-light attached batteries become break building burn by-path carbons carrying capacity cause combustible material concealed conductors conduit connection construction copper copper wire cross-connection cuit current passes damp danger devices direct current double-pole ductors dynamo earth elec electric circuit electrical pressure electro-motive force energy excessive current exposed fastened fire fixture floor flow fuse fusible cut-out gas-pipe glass or porcelain globe ground hanger-board heat high-potential incandescent lamps inch inflammable inflammable material Inigo Jones installed insulating covering Insulating-joints leak leakage liable light lightning-arrester low-potential mains melt metal moisture motor multiple system multiple-series necessary neutral wire operated path pipe placed possible potential prevent protected resistance-box rheostat Rule 18 Section series circuits service-switch short circuit socket soldered space switch switch-board temperature tion transformer trical tube underwriters volts W. J. LOFTIE walls waterproof wires leading
Популярні уривки
Сторінка 127 - Definitions). b. Must be placed at every point where a change is made in the size of the wire (unless the cut-out in the larger wire will protect the smaller).
Сторінка 67 - Must be placed on the switch board, or, if not thereon, at a distance of a foot from combustible material, or separated therefrom by a non-inflammable, non-absorptive, insulating material.
Сторінка 140 - No combination fixture in which the conductors are concealed in a space less than one-fourth inch between the inside pipe and the outside casing, will be approved. h. Each fixture must be tested for "contacts...
Сторінка 79 - VOLTS. Any circuit attached to any machine or combination of machines which develops a difference of potential, between any two wires, of over...
Сторінка 64 - Special attention is called to the fact that switchboards should not be built down to the floor, nor up to the ceiling, but a space of at least ten or twelve inches should be left between the floor and the board, and from eighteen to twenty-four inches between the ceiling and the board, in order to prevent fire from communicating from the switchboard to the floor or ceiling and also to prevent the forming of a partially concealed space very...
Сторінка 121 - ... b. Must not be placed in the immediate vicinity of easily ignitible stuff or where exposed to inflammable gases or dust or to flyings of combustible material.
Сторінка 112 - 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.
Сторінка 135 - ... capacity of the wire is exceeded. 25. TABLE OF CAPACITY OF WIRES:— It must be clearly understood that the size of the fuse depends upon the size of the smallest conductor it protects, and not upon the amount of current to be used on the circuit. Below is a table showing the...
Сторінка 87 - Must be so spliced or joined as to be both mechanically and electrically secure without solder. The joints must then be soldered, to insure preservation, and covered with an insulation equal to that on the conductors.
Сторінка 123 - ... the conductors, and the conductors then to be pushed or fished in. The conductors must not be placed in position until all mechanical work on the building has been, as far as possible, completed. d. Must not be so placed as to be subject to mechanical injury by saws, chisels, or nails.