Storage Batteries, Incandescent Lighting, Arc Lighting, Interior Wiring, Modern Electric-lighting Devices, Electric Signs, Electric HeatingInternat. Textbook Company, 1908 |
Загальні терміни та фрази
adjusted allowed alternating current alternating-current ammeter amount ampere-hours amperes arc lamps arc-light armature arrangement battery booster burn candle candlepower carbon carry cells cent center of distribution charging circuit circular mils conductors conduit connected in series constant constant-current constant-potential copper cut-out device direct current direct-current discharge distance drop dynamo efficiency electric enclosed arc enclosed-arc lamp feeders feet filament fixture fuse globe ground heat hence illumination incandescent lamps inch increase installed insulation light load lower machine magnet mains means method motors necessary Nernst lamp neutral number of lamps ohms open-arc lamp operated ordinary pipe placed plates plug porcelain positive pressure primary reactance regulation resistance rheostat secondary series circuit short-circuiting shown in Fig shows shunt coil side socket standard candle station supplied switch switchboard tantalum temperature terminals three-phase three-wire system tion transformer tube two-wire Underwriters usually voltage voltmeter volts watt-hours watts wire
Популярні уривки
Сторінка 30 - 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 6 - 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 56 - 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 60 - ... b. Must be placed at every point where a change is made in the size of wire [unless the cut-out in the larger wire will protect the smaller.
Сторінка 8 - 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 14 - 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 8 - 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 7 - All joints must be soldered, even if made with some form of patent splicing device. This ruling applies to joints and splices in all classes of wiring covered by these rules.
Сторінка 20 - 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.