Electric Lighting SpecificationsW. J. Johnstone Company, Limited, 1892 - 176 стор. |
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Сторінка 131
Earl Abbott Merrill. per cent . less when the wire is closed in a tube or piece of molding than when bare and exposed to the air , when the heat is rapidly radiated . It must be clearly understood that the size of the fuse depends upon ...
Earl Abbott Merrill. per cent . less when the wire is closed in a tube or piece of molding than when bare and exposed to the air , when the heat is rapidly radiated . It must be clearly understood that the size of the fuse depends upon ...
Сторінка 144
... tube or casing impervious to water , and must be so attached and supported as to be secure from abrasion or other mechanical injury . ( Note . - Rubber tubing will not meet the above requirement as an insulation . ) Arc Lamps . 17. The ...
... tube or casing impervious to water , and must be so attached and supported as to be secure from abrasion or other mechanical injury . ( Note . - Rubber tubing will not meet the above requirement as an insulation . ) Arc Lamps . 17. The ...
Сторінка 146
... tube , and if rigidly and securely supported , and surrounded by and imbedded in a solid insulating substance , may lie within one - quarter inch of each other . 22. When underground service conductors enter a building care must be ...
... tube , and if rigidly and securely supported , and surrounded by and imbedded in a solid insulating substance , may lie within one - quarter inch of each other . 22. When underground service conductors enter a building care must be ...
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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