. The Street railway journal . the middle from the bracket orspan wire, and on each end of which the trolleywire clips are supported. This was describedin the Street Railway Journal of April 5,1902. The company has a very heavy direct-current feeding system, and aims to maintainthe maximum drop of voltage on its lines towithin 5 per cent. PHILADELPHIA RAPID TRANSIT COMPANY The Philadelphia Rapid Transit Companyuses No. 00 trolley wire. The standard polesare shown by the engraving on page are almost entirely under ground, inthe shape of paper-insulated and lead-coveredcables. The la
. The Street railway journal . the middle from the bracket orspan wire, and on each end of which the trolleywire clips are supported. This was describedin the Street Railway Journal of April 5,1902. The company has a very heavy direct-current feeding system, and aims to maintainthe maximum drop of voltage on its lines towithin 5 per cent. PHILADELPHIA RAPID TRANSIT COMPANY The Philadelphia Rapid Transit Companyuses No. 00 trolley wire. The standard polesare shown by the engraving on page are almost entirely under ground, inthe shape of paper-insulated and lead-coveredcables. The largest cables are 1,500,000 For overhead work the cables are triplebraid insulation, 500,000 circ. mill in size. Thelines are laid out for approximately a 10 percent drop in voltage for the load which it isestimated will occur on the line. When the loadoverruns this, of course the drop is feeders have an insulation 5-32 in. thick, ofsaturated paper, and a lead covering of the same thickness. For. JUNCTION HOWARD AND FAYETTE STREETS, BALTIMORE,WITH TOWER WAGON AT WORK straight line work a round-top bell trolley wire insulator isused, with soldered ears 15 ins. long, and weighing 14 ounces. August 29, 1903.] STREET RAILWAY JOURNAL. 345 The poles have a sleeve which fits over them at the ground lineto protect them against rust at that point. On the ChicagoUnion Traction lines, a cast-iron sleeve, fitting loosely, wasput at the ground line. Between the sleeve and the pole pitchwas poured. PITTSBURG RAILWAYS COMPANYThe standard trolley wire of the Pittsburg Railways Com-pany is No. 00 round. The span wire is 5-16 in. seven-strandgalvanized iron wire. Iron poles on straight line work are 7ins., 6 ins. and 5 ins. in diameter for heavy work, and 6 ins., 5ins. and 4 ins. for lighter work. The feeder poles are 31 , and those not carrying feeders 28^2 ft. long. Both cop-per and aluminum overhead feeders have been used to a con-siderable extent. The c
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
