A Hand-book of Wiring Tables for Arc, Incandescent Lighting, and Motor CircuitsBubier Publishing Company, 1892 - 76 стор. |
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Результати 1-5 із 15
Сторінка 13
... resistance of the wire . Ohms ' formula is the foundation of all calculations of this nature . If C repre- sents the current in " amperes , " E the elec- tro - motive force in " volts " and R 13 GENERAL INFORMATION II.
... resistance of the wire . Ohms ' formula is the foundation of all calculations of this nature . If C repre- sents the current in " amperes , " E the elec- tro - motive force in " volts " and R 13 GENERAL INFORMATION II.
Сторінка 14
... ohms " then C- But the number of volts to overcome the resistance of the circuit must be small as compared with the electro - motive force used for doing commercial work . Depending on the cost of coal and copper , it is common to allow ...
... ohms " then C- But the number of volts to overcome the resistance of the circuit must be small as compared with the electro - motive force used for doing commercial work . Depending on the cost of coal and copper , it is common to allow ...
Сторінка 15
... ohms . 8 miles equals 42,240 feet , hence the resistance of 1000 feet would be 42240 - .6155 ohms . = Looking at the table on pages 40 and 41 in the column of resistances per 1000 feet , .62849 is the nearest to this number . The size of ...
... ohms . 8 miles equals 42,240 feet , hence the resistance of 1000 feet would be 42240 - .6155 ohms . = Looking at the table on pages 40 and 41 in the column of resistances per 1000 feet , .62849 is the nearest to this number . The size of ...
Сторінка 18
... ohms for 30 feet- , twice the fifteen feet to allow for the return . Hence for 1000 feet ( in order to be found in the table of resistances ) it would be 3.7 ohms . The nearest to this in the table is 3.1 and the size corresponding is ...
... ohms for 30 feet- , twice the fifteen feet to allow for the return . Hence for 1000 feet ( in order to be found in the table of resistances ) it would be 3.7 ohms . The nearest to this in the table is 3.1 and the size corresponding is ...
Сторінка 19
... ohms . For 1000 feet it would be .6266 and the size corresponding is No. 8 ( 128 inches ) . The size of the 150 foot lengths from the house to the center of distribution will of course be still larger . Allow I per cent , then the 99 ...
... ohms . For 1000 feet it would be .6266 and the size corresponding is No. 8 ( 128 inches ) . The size of the 150 foot lengths from the house to the center of distribution will of course be still larger . Allow I per cent , then the 99 ...
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A Hand-Book of Wiring Tables for Arc, Incandescent Lighting, and Motor Circuits Arthur Eugene Watson Попередній перегляд недоступний - 2018 |
A Hand-Book of Wiring Tables for ARC, Incandescent Lighting, and Motor Circuits Arthur Eugene Watson Попередній перегляд недоступний - 2015 |
Загальні терміни та фрази
104-volt lamps 16 c. p. lamps 52-volt lamps alternating current amperes Amperex approved insulation arc circuits arc lamps arc system ARC-LIGHT Area in CM=d2 attached to build automatic Board cent loss center of distribution circular mills Cleats Cloth Bound conducting wires conductors covered Diameter in Mils direct current Distance in feet dynamo EDISON SYSTEM edition Edward Trevert electric light wires Electricians electro-motive force England Insurance Exchange enter the building entering buildings erected extra heavy Farad feet from transformer fixtures Formula Hand-book house mains incandescent lamps Incandescent System inflammable material INSIDE WIRING joints line wire located magneto material mechanical injury moisture Nostrand's Science Series number of lamps ohms overhead wires pipe poles porcelain Practical Primary Mains Pure Copper Wire regulations rheostat rubber hooks rules secondary mains secured Series motors size of wire soldered spark arrester supply wires Telegra tion tube two-wire system voltage water-proof insulation Watts WIRING TABLE
Популярні уривки
Сторінка 58 - Flexible cord must not be used except for pendants, wiring of fixtures, portable lamps or motors, portable heating apparatus or other portable devices.
Сторінка 51 - ... c. Must be at least seven feet above the highest point of flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached.