Standard Wiring for Electric Light and Power: As Adopted by the Fire Underwriters of the United States : Containing National Electrical Code : Explained and Illustrated Together with the Necessary Tables and Formulae for Outside and Inside Wiring and Construction for All SystemsH.C. Cushing, Jr., 1902 - 152 стор. |
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Standard Wiring for Electric Light and Power, as Adopted by the Fire ... H. C. Cushing Попередній перегляд недоступний - 2023 |
Standard Wiring for Electric Light and Power, as Adopted by the Fire ... H C 1869- Cushing Попередній перегляд недоступний - 2015 |
Standard Wiring for Electric Light and Power, as Adopted by the Fire ... H C 1869- Cushing Попередній перегляд недоступний - 2023 |
Загальні терміни та фрази
16-candle-power lamps Alternating Current amperes arc lamps armature belt binding post brushes building BURNLEY Cable car house carrying capacity ceiling cent circuit breaker circular mils commutator conductors connected constructed copper wire cross arm cut-out diameter DIRECT CURRENT distance dynamo efficiency electric light Fahrenheit Feeder feet fixture flexible cord Formulae fuse wire gas pipe Gauge GROUND DETECTOR ground wire horse power illumination incandescent lamps installation Insulated Wire Insulating Joint iron knife switches least length light and power Lightning Arresters Line Wire load loss in line machine Manufacturers moisture motors and lights neutral wire non-combustible ohms placed plate pole porcelain porcelain or glass power factor power wires prevent primary circuit Primary Wiring pulley resistance rheostat RUBBER INSULATION screws service wires shaft single-phase socket soldered STANDARD switch switchboard Telephone three-phase three-wire tion transformers tube two-phase voltage Volts Lost watts Weatherproof WESTON YORK
Популярні уривки
Сторінка 57 - 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 6 - Switchboard should be so placed as to reduce to a minimum the danger...
Сторінка 73 - All burrs or fins should be removed from the fixtures before the wires are drawn in. The tendency to condensation within the pipes should be guarded against by sealing the upper end of the fixture. In combination fixtures, where the wiring is concealed between the inside pipe and outer casing, the space between pipe and casing should be at least a quarter of an inch to allow plenty of room for the insulation of the wires without jamming. Fixtures should be tested for "contacts" between conductors...
Сторінка 79 - The cut-out or circuit breaker should always be the first thing that the service wires are connected to after entering the building; the switch next, and then the other fixtures or devices in their order. This arrangement is made so that the cut-out or circuit breaker will protect all wiring in the building, and the opening of the switch will -disconnect all the wiring.
Сторінка 106 - No. 17 a) for each lamp or each series of lamps. The branch conductors should have a carrying capacity about fifty per cent, in excess of the normal current required by the lamp...
Сторінка 19 - The leads or branch circuits should be designed to carry a current at least fifty per cent greater than that required by the rated capacity of the motor, to provide for the inevitable overloading of the motor at times, without over-fusing the wires. The motor and resistance box should be protected by a cutout or circuit breaker, and controlled by a switch, the switch plainly indicating whether "on
Сторінка 81 - 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 8 - Ground wires for lightning arresters should not be attached to gas-pipes within the buildings. It is often desirable to introduce a choke coil in circuit between the arresters and the dynamo. In no case should the ground wire from a lightning arrester be put into iron pipes, as these would tend to impede the discharge.
Сторінка 80 - These automatic cut-outs should not, however, be placed in the immediate vicinity of easily ignitible stuff, or where exposed to inflammable gases or dust, or to flyings of combustible material, as the arcing produced whenever they break the circuit might cause a fire or explosion.
Сторінка 84 - All conductors connecting with telephone, district messenger, burglar alarm, watch clock, electric time, and other similar instruments, must be provided near the point of entrance to the building with some protective device which will operate to shunt the instruments in case of a dangerous rise of potential, and will open the circuit and arrest an abnormal current flow. Any conductor normally forming an innocuous circuit may become a source of fire hazard if crossed with another conductor, through...