. Electric railway journal . Fig. 14—Southern Pacific 1200-Volt Lines—Catenary Bridge Construction on a Four-Track Tangent Section drawn stranded copper high-tension conductors and four nals and all junction points and crossings are protected byNo. 4 solid phosphor-bronze conductors, all of which are electric interlocking plants, which are operated by alter-anchored at all three towers. At tower No. 1 all cables are nating current using both track rails for the circuits. go6 ELECTRIC RAILWAY JOURNAL. [Vol. XXXVIII, No. 17. With but few exceptions, both rails of all tracks are usedfor both sign


. Electric railway journal . Fig. 14—Southern Pacific 1200-Volt Lines—Catenary Bridge Construction on a Four-Track Tangent Section drawn stranded copper high-tension conductors and four nals and all junction points and crossings are protected byNo. 4 solid phosphor-bronze conductors, all of which are electric interlocking plants, which are operated by alter-anchored at all three towers. At tower No. 1 all cables are nating current using both track rails for the circuits. go6 ELECTRIC RAILWAY JOURNAL. [Vol. XXXVIII, No. 17. With but few exceptions, both rails of all tracks are usedfor both signal and return circuits. The exceptions,where single rail circuits are used, are in terminal yardsand at certain junction points where complicated signal


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