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. |
З цієї книги
Результати 1-5 із 12
Сторінка 13
... column , but with 2 × 90 or 180 lamps . Having the HORSE - POWER , and effi- ciency of a motor to go on a 500 - volt cir- cuit , to find the amperes with which to enter Table V , or to apply formula ( 2 ) , we have the following : 149 ...
... column , but with 2 × 90 or 180 lamps . Having the HORSE - POWER , and effi- ciency of a motor to go on a 500 - volt cir- cuit , to find the amperes with which to enter Table V , or to apply formula ( 2 ) , we have the following : 149 ...
Сторінка 20
... 866 - 854 285 28 HER ARE 28 888 C # 808 GR 2 888 299 388 888 882 889 828 960 888 888 929 ERR 958 889 988 882 RE 957 112 125 765 776 876 150 175 200 225 250 300 986 TABLE V. VOLTS . Columns , Feet below . 20 20 20 WIRING.
... 866 - 854 285 28 HER ARE 28 888 C # 808 GR 2 888 299 388 888 882 889 828 960 888 888 929 ERR 958 889 988 882 RE 957 112 125 765 776 876 150 175 200 225 250 300 986 TABLE V. VOLTS . Columns , Feet below . 20 20 20 WIRING.
Сторінка 23
... Columns , Feet below . 20 30 40 50 150 200 12220 8150 6110 4890 1630 1222 9700 6455 4850 3875 1290 970 7700 5130 3850 3080 1025 770 6110 4075 3055 2445 815 610 4860 3240 2430 1945 650 485 3869 2575 1980 1545 515 385 3060 2040 1530 1225 ...
... Columns , Feet below . 20 30 40 50 150 200 12220 8150 6110 4890 1630 1222 9700 6455 4850 3875 1290 970 7700 5130 3850 3080 1025 770 6110 4075 3055 2445 815 610 4860 3240 2430 1945 650 485 3869 2575 1980 1545 515 385 3060 2040 1530 1225 ...
Сторінка 25
... Columns , Feet below . 16 20 25 30 40 50 75 100 61125 48900 39120 48500 38750 31000 38500 30800 24640 30550 24450 19560 24300 19450 15560 19:00 15450 12360 32600 24450 19560 13040 9780 25830 19400 15500 10330 7750 20530 15400 12320 8210 ...
... Columns , Feet below . 16 20 25 30 40 50 75 100 61125 48900 39120 48500 38750 31000 38500 30800 24640 30550 24450 19560 24300 19450 15560 19:00 15450 12360 32600 24450 19560 13040 9780 25830 19400 15500 10330 7750 20530 15400 12320 8210 ...
Сторінка 26
... 12800 6040 4020 3020 2010 1510 13 ... 9600 4800 3200 2400 1600 1200 14 . 7600 3800 2530 1900 1265 950 15 16 :: 6040 3020 2010 1510 1005 755 4780 2390 1590 1195 795 600 TABLE VII . VOLTS . Columns , Feet below . 26 WIRING.
... 12800 6040 4020 3020 2010 1510 13 ... 9600 4800 3200 2400 1600 1200 14 . 7600 3800 2530 1900 1265 950 15 16 :: 6040 3020 2010 1510 1005 755 4780 2390 1590 1195 795 600 TABLE VII . VOLTS . Columns , Feet below . 26 WIRING.
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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...