Standard Tables for Electric Wiremen: With Instructions for Wiremen and Linemen, Underwriters' Rules, and Useful Formulæ and DataW.J. Johnston Company, Limited, 1893 - 128 стор. |
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Сторінка 53
... walls . All wiring running over cornices or other building projections should be protected with rubber tubing thoroughly taped and painted at the ends . Never let a wire , however well protected , come in contact with the outside ...
... walls . All wiring running over cornices or other building projections should be protected with rubber tubing thoroughly taped and painted at the ends . Never let a wire , however well protected , come in contact with the outside ...
Сторінка 57
... wall . Always place glass or porcelain knobs between the box and wall . In tying in , never draw the tie wire so as to bend a kink in the line or cut through the insulation with the tie . A tie will properly hold the wire in place ...
... wall . Always place glass or porcelain knobs between the box and wall . In tying in , never draw the tie wire so as to bend a kink in the line or cut through the insulation with the tie . A tie will properly hold the wire in place ...
Сторінка 60
... walls through which they may pass by non - combustible insulat- ing tubes , such as glass or porcelain . d . Must be kept rigidly so far apart that they cannot come in contact . e . Must be covered with non - inflamma- ble insulating ...
... walls through which they may pass by non - combustible insulat- ing tubes , such as glass or porcelain . d . Must be kept rigidly so far apart that they cannot come in contact . e . Must be covered with non - inflamma- ble insulating ...
Сторінка 61
... wall when the wiring is entirely on the face . c . Must be kept free from moisture . d . Must be made of non - combustible material , or of hard wood in skeleton form , filled to prevent absorption of moisture . e . Bus bars must be ...
... wall when the wiring is entirely on the face . c . Must be kept free from moisture . d . Must be made of non - combustible material , or of hard wood in skeleton form , filled to prevent absorption of moisture . e . Bus bars must be ...
Сторінка 65
... walls with extra water- proof insulation , and must have drip loops outside . The hole through which the conductor passes must be bushed with waterproof and non - combustible insulat- ing tube or hard rubber tube , slanting up- ward ...
... walls with extra water- proof insulation , and must have drip loops outside . The hole through which the conductor passes must be bushed with waterproof and non - combustible insulat- ing tube or hard rubber tube , slanting up- ward ...
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Standard Tables for Electric Wiremen. with Instructions for Wiremen and ... William Dixon Weaver,Charles M. Davis Попередній перегляд недоступний - 2018 |
Standard Tables for Electric Wiremen. With Instructions for Wiremen and ... William Dixon Weaver,Charles M Davis Попередній перегляд недоступний - 2023 |
Standard Tables for Electric Wiremen. with Instructions for Wiremen and ... William Dixon Weaver,Charles M. Davis Попередній перегляд недоступний - 2015 |
Загальні терміни та фрази
18 lamps 20 feet address on receipt Alternating Currents Amperes approved insulating ARC LAMPS Battery boiler branch building calculate CARL HERING cent of Loss circuit circular mils Cloth combustible material conductors connected constructed converter copper cut-out device diameter Distance between Wires distributing point double-pole ductors dynamo electric light Electric Railway Electricians Electromagnets Elihu Thomson equivalent exposed to dampness feeder fixture floor formula fuses fusible glass or porcelain ground Horse-power illus illustrations inches Inspector insulating covering insulating material insulating resistance JOHN HOPKINSON joint lamp centre least liable LOUIS BELL magnets Mailed prepaid metal moisture NIKOLA TESLA non-combustible NUMBER OF LAMPS Ohms paint PERIODS PER SECOND pipes placed poles porcelain potential Practical Price Primers Prof protected Publishers pulley Quadruplex Railway DIRECTORY revolutions rheostat RULE Section socket solder STATIONS Street Railway switch tape Telegraph Telephone tion VOLTS W. J. JOHNSTON COMPANY waterproof
Популярні уривки
Сторінка 71 - ... 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 77 - 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. e. Must be tested for "contacts" between conductors and fixtures, for "short circuits" and for ground connections before it is connected to its supply conductors.
Сторінка 94 - 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 74 - 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 safe carrying capacity of conductors of different sizes in Brown & Sharpe gauge, which must be followed in the placing of interior conductors: — TABLE A, CONCEALED WORK.
Сторінка 69 - 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 128 - The Electric Motor and Its Applications. By TC Martin and Jos. Wetzler. With an appendix on the Development of the Electric Motor since 1888, by Dr, Louis Bell.
Сторінка 72 - 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...
Сторінка 65 - 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 58 - CARE AND ATTENDANCE: A competent man must be kept on duty in the room where generators are operating. Oily waste must be kept in approved metal cans and removed daily.
Сторінка 90 - The insulating covering of the wire to be approved under this section must be solid, at least -fa of an inch in thickness and covered with a substantial braid. It must not readily carry fire, must show an insulating resistance of one megohm per mile after two weeks...