. The Street railway journal . e no grades on the line steeper than i per miles. Elliot semaphore switch stands with oil lamps are used. OVERHEAD CONSTRUCTIONSpan wire trolley construction is used on the main lineand bracket construction on the Edwardsville branch. Thepoles, which are placed 100 ft. apart, are extra heavy andare of Michigan white cedar. Double trolleys of 000 groovedwire are placed 18 ft. above the rail. Lightning arrestersare located one-third of a mile apart, and in addition tohaving the usual earth ground are grounded to the rail. 532 STREET RAILWAY JOURNAL. [Vol. XXIX. No.
. The Street railway journal . e no grades on the line steeper than i per miles. Elliot semaphore switch stands with oil lamps are used. OVERHEAD CONSTRUCTIONSpan wire trolley construction is used on the main lineand bracket construction on the Edwardsville branch. Thepoles, which are placed 100 ft. apart, are extra heavy andare of Michigan white cedar. Double trolleys of 000 groovedwire are placed 18 ft. above the rail. Lightning arrestersare located one-third of a mile apart, and in addition tohaving the usual earth ground are grounded to the rail. 532 STREET RAILWAY JOURNAL. [Vol. XXIX. No. 13. Direct-current feeders are carried the full length of the line 200 volts to two sub-stations, one located at Granite Cityand consist mainly of 300,000 and i,ooo, bare and the other a few miles south of Alton. The one high-tension line supplying these sub-stations consists of threeNo. 4 copper conductors supported on lock No. 18 glassinsulators. The manner in which the high-tension wires % X 4|^carriai:e Ijolt. ^ X 14 cross-arm bolt Street STANDARD POLE AND INSULATION LAYOUT FOR HIGH-TENSION WIRES are carried on the poles is somewhat unusual. Three cross-arms, two of which are 3 ft. long and the third 9 ft. long,NORTH APPROACH OF THE EAST ST. LOUIS VIADUCT are employed. The arms are 25^:^ ins. apart and one wire IS vciiliUtor O ■^.\W.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
