Storage batteries ; incandescent lighting ; arc lighting ; interior wiring ; modern electric-lighting devices ; electric signs ; electric heating
International Textbook Company, 1908
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Storage Batteries ; Incandescent Lighting ; Arc Lighting ; Interior Wiring ...
Повний перегляд - 1908
Storage Batteries, Incandescent Lighting, ARC Lighting, Interior Wiring ...
International Correspondence Schools
Попередній перегляд недоступний - 2015
16-candlepower adjusted allowed alternating current alternating-current ammeter amount ampere-hours amperes annunciator arc lamps arc-light armature arranged battery bell booster burn candlepower carbon carry cells cent charging circuit circular mils coil conductors conduit connected in series constant-current constant-potential cut-out devices direct current direct-current discharge distance drop dynamo efficiency electric electrode electrolyte enclosed arc enclosed-arc lamp feeders feet filament fixture fuse globe ground heat heater hence holder illumination incandescent lamps inch increase installed insulation iron light load lower machine magnet mains mercury-vapor lamps metal method motor necessary negative Nernst lamp number of lamps ohms open-arc lamp operated ordinary osmium outlet pipe placed plug porcelain pressure reactance regulator resistance rheostat screw secondary short-circuiting shown in Fig shows shunt side socket station supplied switch switchboard tantalum temperature terminals three-wire system tion transformer tube Underwriters usually voltage voltmeter volts watt-hours 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 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 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 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 56 - The object of a tube or conduit is to facilitate the insertion or extraction of the conductors to protect them from mechanical injury and, as far as possible, from moisture. Tubes or conduits are to be considered merely as raceways, and are not to be relied upon for insulation between wire and wire, or between the wire and the ground.
Сторінка 18 - Must, on side walls be protected from mechanical injury by a substantial boxing, retaining an air space of one inch around the conductors, closed at the top (the wires passing through bushed holes ) , and extending not less than seven feet from the floor.
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 13 - ... c. Where underground service enters building through tubes, the tubes shall be tightly closed at outlets with asphaltum or other non-conductor, to prevent gases from entering the building through such channels.
Сторінка 64 - ... 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...