. The Street railway journal . have acurve connecting them the trolley wire over the curve con-tains a section insulator connected to a switch and the whole network of lines is completely connectedelectrically, and yet each section of every line can quicklybe isolated. On all the latest work the two trolley wires on doubletrack lines have been connected electrically at every fourthspan so as to get the benefit of all the copper in track work the rails are carefully bonded every150 ft. to make the four rails practically one conductor,and yet on double track lines t
. The Street railway journal . have acurve connecting them the trolley wire over the curve con-tains a section insulator connected to a switch and the whole network of lines is completely connectedelectrically, and yet each section of every line can quicklybe isolated. On all the latest work the two trolley wires on doubletrack lines have been connected electrically at every fourthspan so as to get the benefit of all the copper in track work the rails are carefully bonded every150 ft. to make the four rails practically one conductor,and yet on double track lines the two trolley wires have insome places been thoroughly, though unintentionally, in- as much current will l)e alxsorbed on one side of it as onthe other—l* Bells center of gravity. Thiselectrical center is the main feed-in point for the sec-tion, but in a heavy grade occurs near by a tap is runto the trolley at the center of the grade. The sizes of thefeeders are No. 0000 B. & vS. 300,000 c m. and 500,000.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
