Electric Wiring for the Use of Architects, Underwriters, and the Owners of BuildingsMacmillan and Company, 1896 - 183 стор. |
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Сторінка 6
... comes from the fact that electric insula- tors can be either punctured or permeated by con- ductors . Sometimes the insulators themselves become conductors through the action of heat or other dete- riorating agents , and it is thus ...
... comes from the fact that electric insula- tors can be either punctured or permeated by con- ductors . Sometimes the insulators themselves become conductors through the action of heat or other dete- riorating agents , and it is thus ...
Сторінка 54
... comes from erroneous ideas of the way in which the insurance code has grown . It is not an auto- cratic pronunciamento , but the result of a natural development . Starting with a few restrictions that were plainly necessary , the code ...
... comes from erroneous ideas of the way in which the insurance code has grown . It is not an auto- cratic pronunciamento , but the result of a natural development . Starting with a few restrictions that were plainly necessary , the code ...
Сторінка 55
... comes from the better class of electrical men is not that the rules are too exacting , but that they are not always rigidly and consistently enforced . Architects can , of course , do much to insure good electrical construction in their ...
... comes from the better class of electrical men is not that the rules are too exacting , but that they are not always rigidly and consistently enforced . Architects can , of course , do much to insure good electrical construction in their ...
Сторінка 58
... comes in another way , if the dynamo be damp and not well insulated from the ground : though the circuit is supposed to be insulated from the ironwork of the machine , there is liability of a connection , and if the wooden frame under ...
... comes in another way , if the dynamo be damp and not well insulated from the ground : though the circuit is supposed to be insulated from the ironwork of the machine , there is liability of a connection , and if the wooden frame under ...
Сторінка 71
... comes one after the other , " in series " ; the same current going through each . ( Fig . 19. ) The electrical pressure necessary to force the current through such a circuit is usually high , because each device requires a certain ...
... comes one after the other , " in series " ; the same current going through each . ( Fig . 19. ) The electrical pressure necessary to force the current through such a circuit is usually high , because each device requires a certain ...
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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 wire cross-connection cuit current passes damp danger devices 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 liability light lightning-arrester low-potential mains melt metal moisture motor multiple system multiple-series necessary neutral wire Ohm's law operated path pipe placed possible potential prevent protected resistance-box rheostat Rule 18 Section series circuit service-switch short circuit shown in Figure socket soldered space switch switch-board temperature tion transformer trical tube underwriters volts W. J. LOFTIE walls waterproof wires leading
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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 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 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 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 - Must not be of such material or construction that the insulation of the conductor will ultimately be injured or destroyed by the elements of the composition. c. Must be first installed as a complete conduit system, without conductors, strings, or anything for the purpose of drawing in 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...
Сторінка 162 - Must be capable of being disconnected at the power plant, or of being divided into sections, so that in case of fire on the railway route, the current may be shut off from the particular section and not interfere with the work of the firemen. This rule also applies to feeders.
Сторінка 139 - Must be entirely made of material that will resist the action of illuminating gases and will not give way or soften under the heat of an ordinary gas flame or leak under a moderate pressure.
Сторінка 114 - ... b. Must be so arranged that wires of opposite polarity, with a difference of potential of 150 volts or less, will be kept apart at least two and one-half inches, c. Must have the above distance increased proportionately where a higher voltage is used. d. Must not be laid in plaster, cement or similar finish, e. Must never be fastened with staples. IN UNFINISHED LOFTS, BETWEEN FLOORS AND CEILINGS, IN PARTITIONS AND OTHER CONCEALED PLACES:—/'.