A Hand-book of Wiring Tables for Arc, Incandescent Lighting, and Motor CircuitsBubier Publishing Company, 1892 - 76 стор. |
З цієї книги
Результати 1-5 із 8
Сторінка 50
... separated at least twelve inches from each other , and must be pro- vided with an approved cut - out switch at the point where they enter the building . The same precautions must be observed in entering the building that are required ...
... separated at least twelve inches from each other , and must be pro- vided with an approved cut - out switch at the point where they enter the building . The same precautions must be observed in entering the building that are required ...
Сторінка 52
... separated by a distance of not less than six inches , for currents having an electro - motive force of 250 volts or less , and this distance must be increased for currents of higher potential . 8. They must also be rigidly and neatly ...
... separated by a distance of not less than six inches , for currents having an electro - motive force of 250 volts or less , and this distance must be increased for currents of higher potential . 8. They must also be rigidly and neatly ...
Сторінка 54
... separated at least six inches . The wire must be thoroughly and carefully put up and must be supported by glass or porcelain insulators , or by rubber hooks . 25. In crossing any metal pipes , or any other conduc- tor , wires must be ...
... separated at least six inches . The wire must be thoroughly and carefully put up and must be supported by glass or porcelain insulators , or by rubber hooks . 25. In crossing any metal pipes , or any other conduc- tor , wires must be ...
Сторінка 55
... separated a greater distance . 32. The dividing strip between grooves in moulding must never be reduced below one - half inch in thickness by cutting out to admit joints in wires . 33. Where exposed to acid fumes , vapors of ammonia ...
... separated a greater distance . 32. The dividing strip between grooves in moulding must never be reduced below one - half inch in thickness by cutting out to admit joints in wires . 33. Where exposed to acid fumes , vapors of ammonia ...
Сторінка 58
... separated by a fibre insulation , or the like . If a water - proof insulation is necessary , it must be placed outside the two conductors , and must in all cases be covered with a non - inflammable outside coating , to prevent cord from ...
... separated by a fibre insulation , or the like . If a water - proof insulation is necessary , it must be placed outside the two conductors , and must in all cases be covered with a non - inflammable outside coating , to prevent cord from ...
Інші видання - Показати все
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.