Modern Electrical Construction: A Reliable, Practical Guide for the Beginner in Electrical Construction, Showing the Latest Approved Methods of Installing Work of All Kinds According to the Safety Rules of the National Board of Fire UnderwritersFrederick J. Drake & Company, 1908 - 329 стор. |
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Modern Electrical Construction Henry Charles Horstmann,Victor Hugo Tousley Попередній перегляд недоступний - 2015 |
Загальні терміни та фрази
alternating current amperes approved arc lamps armature arranged battery braid building bushings cabinet cable carrying capacity ceiling cent circuit breaker circular mils coil conductors connected copper covering current flow cut-out degrees Fahrenheit Department having jurisdiction designed device diagram diameter difference of potential direct current distance dynamo enclosed exposed Fahrenheit fastened feet fireproof fixture flexible cord floor frame gage gas pipe ground wire heat hole inch in thickness Inspection Department insulating material iron joints junction boxes knife switches knobs least less lightning arrester located metal conduit moisture motor moulding mounted National Electrical Code necessary nected neutral wire non-absorptive insulating non-combustible ohms operate outlet boxes placed plate plug porcelain prevent protected receptacles resistance rheostat rubber insulation screws secured short circuit shown in Figure shows side slate or marble sockets soldered stranded supported switch switchboard tape terminals three-wire system tion tubing voltage volts wall waterproof
Популярні уривки
Сторінка 313 - 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 289 - 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 227 - 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 47 - Must never be placed in a room where any hazardous process is carried on, nor in places where they would be exposed to inflammable gases, or flyings of combustible material.
Сторінка 235 - No. 8 b), be rigidly supported on glass or porcelain insulators, which raise the wire at least one inch from .the surface wired over, and must be kept about eight inches apart.
Сторінка 92 - Must be protected by dead insulated guard irons or wires from possibility of contact with other conducting wires or substances to which current may leak. Special precautions of this kind must be taken where sharp angles occur, or where any wires might possibly come in contact with...
Сторінка 108 - ... the buildings. This connection may be made by carrying the ground wire into the cellar and connecting on the street side of meters, main cocks, etc., but connection should never be made to any lead pipes which form part of gas services.
Сторінка 121 - In wet places it should be arranged so 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 59 - Must each be provided with a name-plate, giving the maker's name, the capacity in volts and amperes, and the normal speed in revolutions per minute.
Сторінка 251 - ... be of such a nature as will not have a deteriorating effect on the insulation of the conductor, and be sufficiently tough and tenacious to withstand the abrasion test of drawing long lengths of conductors in and out of same. //. The insulating lining must not be mechanically weak after three days...