. The street railway review . being introduced by the Elec-tric Cable of New York City, which manufactures the insu-lating compound that plays an important part in the conduit con-struction. By reference to the illustrations it will be seen that the arrange-ment of the cables in the trench is a simple one. For installingthe ordinary high or low tension feeder system a trench is firstexcavated to a suitable section. In this trench is laid a woodenbox. The cables are supported in their proper position within thiswooden trough by insulator blocks or bridges which lock about theconductor as s
. The street railway review . being introduced by the Elec-tric Cable of New York City, which manufactures the insu-lating compound that plays an important part in the conduit con-struction. By reference to the illustrations it will be seen that the arrange-ment of the cables in the trench is a simple one. For installingthe ordinary high or low tension feeder system a trench is firstexcavated to a suitable section. In this trench is laid a woodenbox. The cables are supported in their proper position within thiswooden trough by insulator blocks or bridges which lock about theconductor as shown in the illustration. These bridges are spacedabout four or five feet apart along the cables, and when the con-ductors have been stretched in place the interior of the box islined with heavy felt or similar material so spaced as to retain thecables in separate and suitable alignment. When this has beendone all the remaining voids in the wooden box are filled with thecompanys earlier mentioned insulating compound known as. out the insulating compound with a blow torch when the cableswill be ready for making the desired connection. After the tap orsplice is finished the conduit may be placed in its former condi-tion by filling the melted-out portion with a small quantity ofVoltax. There has, heretofore, been an objection made to the solidsystem of underground cable construction, because of the extrawork required to increase the capacity of the conduit as in con-struction where idle ducts can be laid and added copper drawn inas necessary. This method of construction which has here beenoutlined is said to cost 25 to a 1-3 per cent less for a fixed typeof ciinstruction than the duct system, and it is believed that the
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
