Storage Batteries ; Incandescent Lighting ; Arc Lighting ; Interior Wiring ; Modern Electric-lighting Devices ; Electric Signs ; Electric Heating
International Textbook Company, 1908 - 639 стор.
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Storage Batteries, Incandescent Lighting, ARC Lighting, Interior Wiring ...
International Correspondence Schools
Попередній перегляд недоступний - 2015
adjusted allowed alternating amount amperes arc lamps armature arranged battery becomes bell booster building candlepower carbon carry cause cells cent charging circuit closed coil conduit connected constant cut-out desired devices direct discharge distance distribution drop dynamo efficiency electric enclosed example feeders feet fixture flow fuse give given globe ground heat hence incandescent lamps inch increase indicated installed insulation iron lamp lead length less light load lower machine magnet mains material means metal method motor necessary negative normal obtained operated ordinary passes pipe placed plates plug positive pressure primary protect regulation resistance rules secondary separate short shown in Fig shows shunt side station supplied switch Table taken temperature terminals transformer tube usually varies voltage volts watts wire
Сторінка 3 - The American Institute of Electrical Engineers; The American Society of Mechanical Engineers; The American Society of Civil Engineers; The American Society of Mining and Metallurgical Engineers; and The American Society for Testing Materials.
Сторінка 10 - 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 64 - Insulation Resistance — The wiring in any building must test free from grounds; ie, the complete installation must have an insulation between conductors and between all conductors and the ground (not including attachments, sockets, receptacles, etc.) of not less than the following: Up to 5 amperes 4,000,000 ohms...
Сторінка 12 - 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 40 - It offers a temptation to carry about lamps that are intended to hang freely in the air, and the cord adjusters wear off the insulation very rapidly. For all portable work, including...
Сторінка 12 - Must be separated from contact with walls, floors, timbers or partitions through which they may pass by non-combustible, non-absorptive, insulating tubes, such as glass or porcelain, except at outlets where approved flexible tubing is required.
Сторінка 34 - Rigid supporting requires under ordinary conditions, where wiring along flat surfaces, supports at least every four and one-half feet. If the wires are liable to be disturbed, the distance between supports should be shortened. In buildings of mill construction, mains of No.
Сторінка 24 - Cut-outs such as circuit breakers and fuses should be placed on all service wires as near as possible to the point where they enter the building, on the inside of the walls, and arranged to cut off the entire current from the building.
Сторінка 13 - Underground conductors must not be so arranged as to shunt the current through a building around any catch-box. c. Where underground service enters building through tubes, the tubes shall be tightly closed at outlets with asphaltum or other nonconductor, to prevent gases from entering the building through such channels. d. No underground service from a subway to a building...