Electric Lighting SpecificationsW. J. Johnstone Company, Limited, 1892 - 176 стор. |
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Результати 11-15 із 22
Сторінка 101
... arc lamps , or a combination of systems . ) ( Note . The point at which street lighting 189. Point of circuits will be controlled will depend much Control . 190. Additions and Deduc- tious . 191. Instruc- tion . ELECTRIC LIGHTING ...
... arc lamps , or a combination of systems . ) ( Note . The point at which street lighting 189. Point of circuits will be controlled will depend much Control . 190. Additions and Deduc- tious . 191. Instruc- tion . ELECTRIC LIGHTING ...
Сторінка 124
... Lamps and Other Devices . ARC LAMPS - Must be in every case : 1. Carefully isolated from inflammable ma- terial . 2. Provided at all times with a glass globe surrounding the arc , securely fastened upon a closed base . No broken or ...
... Lamps and Other Devices . ARC LAMPS - Must be in every case : 1. Carefully isolated from inflammable ma- terial . 2. Provided at all times with a glass globe surrounding the arc , securely fastened upon a closed base . No broken or ...
Сторінка 125
Earl Abbott Merrill. Incandescent lamps in series circuits , hav- ing a maximum potential of 350 volts or over , must be governed by the same rules as for arc lights , and each series lamp provided with a hand switch and automatic cut ...
Earl Abbott Merrill. Incandescent lamps in series circuits , hav- ing a maximum potential of 350 volts or over , must be governed by the same rules as for arc lights , and each series lamp provided with a hand switch and automatic cut ...
Сторінка 128
Earl Abbott Merrill. inch . In crossing arc light wires the low - ten- sion conductors must be placed at a distance of at least six inches . In wet places an air space must be left between conductors and pipes in crossing , and the ...
Earl Abbott Merrill. inch . In crossing arc light wires the low - ten- sion conductors must be placed at a distance of at least six inches . In wet places an air space must be left between conductors and pipes in crossing , and the ...
Сторінка 130
... arc cannot be maintained between the terminals by the fusing of the metal . 5. So placed that on any combination fixt- ure , no group of lamps requiring a current of six ampères or more shall be ultimately dependent upon one cut - out ...
... arc cannot be maintained between the terminals by the fusing of the metal . 5. So placed that on any combination fixt- ure , no group of lamps requiring a current of six ampères or more shall be ultimately dependent upon one cut - out ...
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Age money Alternating Current ampère meter apparatus appliances arc lamps armature attached automatic baseframe bidder shall fill bids building c. p. lamps cables candle power capacity carried ceiling cent centre of distribution cleats conductors conduit connections contractor shall furnish cross-arms cuits cut-out boxes cut-outs and switches Direct Current double-pole dynamo or circuit dynamos Trade number erect the following fastened fill out completely fixture foundation(s full load fuses hand regulator incandescent lamps inches incombustible bases installation insulated wire insulation resistance junction boxes knife switch least lightning arresters main wires ments moisture moisture-proof molding necessary non-combustible number of lights number or designation ohms operation outlets pipes placed plant porcelain potential pressure proper protected pulleys purchaser Rating of exciters riser feeder schedule securely set screws shunt Sockets soldered spark arresters specification steam struction switchboard taps three-wire tightened tion tube two-wire voltage voltmeter volts walls waterproof wire smaller