Electric Wiring for the Use of Architects, Underwriters, and the Owners of BuildingsMacmillan and Company, 1896 - 183 стор. |
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Сторінка 6
... path intended for it . Pipes are strengthened and joints are looked after with regard to the pressure upon them . Electrical insulation should also be looked after with regard to the pressure which it is to withstand , for there is an ...
... path intended for it . Pipes are strengthened and joints are looked after with regard to the pressure upon them . Electrical insulation should also be looked after with regard to the pressure which it is to withstand , for there is an ...
Сторінка 28
... , it is necessary first to make a by - path round the lamp to preserve the continuity of the circuit 28 CHAPTER III SYSTEMS OF DISTRIBUTION THE SERIES SYSTEM THE MUL- TIPLE SYSTEM — HYDRAULIC ANALOGUES THE THREE- WIRE SYSTEM.
... , it is necessary first to make a by - path round the lamp to preserve the continuity of the circuit 28 CHAPTER III SYSTEMS OF DISTRIBUTION THE SERIES SYSTEM THE MUL- TIPLE SYSTEM — HYDRAULIC ANALOGUES THE THREE- WIRE SYSTEM.
Сторінка 38
... path of least resistance , but this needs a qualifica- tion to make it exact . With two paths more current will go through the path of low resistance than through the path of high resistance , but the total current will divide in exact ...
... path of least resistance , but this needs a qualifica- tion to make it exact . With two paths more current will go through the path of low resistance than through the path of high resistance , but the total current will divide in exact ...
Сторінка 46
... paths for the electricity to follow . It was soon found , however , that unless special precautions were taken to confine the current to these paths , there was danger of fire , and the service was poor and uncertain . The first wiring ...
... paths for the electricity to follow . It was soon found , however , that unless special precautions were taken to confine the current to these paths , there was danger of fire , and the service was poor and uncertain . The first wiring ...
Сторінка 58
... path of very low resistance , or a " short circuit , " that will result in a current heavy enough to melt metal and destroy the usefulness of the machine . Trouble comes in another way , if the dynamo be damp and not well insulated from ...
... path of very low resistance , or a " short circuit , " that will result in a current heavy enough to melt metal and destroy the usefulness of the machine . Trouble comes in another way , if the dynamo be damp and not well insulated from ...
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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.