Electric Wiring for the Use of Architects, Underwriters, and the Owners of BuildingsMacmillan and Company, 1896 - 183 стор. |
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Сторінка 6
... leakage . It is as if a water - system were tapped by small pipes through which the water constantly leaked away , only the waste with electricity is far more subtle and attracts no attention unless , because of the leak , there is a ...
... leakage . It is as if a water - system were tapped by small pipes through which the water constantly leaked away , only the waste with electricity is far more subtle and attracts no attention unless , because of the leak , there is a ...
Сторінка 47
... leakage . With this there would be , perhaps , a diminution in the avail- able energy , and probably an arcing and heating that introduced a serious fire hazard . There are two ways in which high temperatures are caused by electric ...
... leakage . With this there would be , perhaps , a diminution in the avail- able energy , and probably an arcing and heating that introduced a serious fire hazard . There are two ways in which high temperatures are caused by electric ...
Сторінка 48
... leakages of this kind are not the only cause of destructive arcing . One wire may come in direct contact with the other wire of the circuit , or it may come in contact with a pipe or a bell - wire in accidental connection with the other ...
... leakages of this kind are not the only cause of destructive arcing . One wire may come in direct contact with the other wire of the circuit , or it may come in contact with a pipe or a bell - wire in accidental connection with the other ...
Сторінка 49
... leakage of electricity and the formation of " short circuits " ; to keep local the effects of these accidents when they happen ; and to make it easy to repair defects . The underwriters now require all wires not encased in approved ...
... leakage of electricity and the formation of " short circuits " ; to keep local the effects of these accidents when they happen ; and to make it easy to repair defects . The underwriters now require all wires not encased in approved ...
Сторінка 58
... leakage . Precautions have to be taken against the beginning of these small leaks . They rapidly become worse , for they are accompanied by heating and sparking which carbonizes surrounding substances , making it possible for still ...
... leakage . Precautions have to be taken against the beginning of these small leaks . They rapidly become worse , for they are accompanied by heating and sparking which carbonizes surrounding substances , making it possible for still ...
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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.