. The Street railway journal . resident districtsa center pole is used, and the hangers are supported onbrackets. On curves, however, center poles are abandoned. feeders are tapped to the trolley at 1000 ft. and 1500 ft. in-tervals, through No. 0000 feed spans. At each feed spanis placed a General Electric type M. D. lightning arrester,which is grounded through a No. o bare copper wire. Nearthe ground this wire is protected by a ^-in. galvanizediron pipe 10 ft. long, and which has 2 ft. of the lower endburied in the ground. To prevent the pipe exercising achoking effect, it is made a part of t
. The Street railway journal . resident districtsa center pole is used, and the hangers are supported onbrackets. On curves, however, center poles are abandoned. feeders are tapped to the trolley at 1000 ft. and 1500 ft. in-tervals, through No. 0000 feed spans. At each feed spanis placed a General Electric type M. D. lightning arrester,which is grounded through a No. o bare copper wire. Nearthe ground this wire is protected by a ^-in. galvanizediron pipe 10 ft. long, and which has 2 ft. of the lower endburied in the ground. To prevent the pipe exercising achoking effect, it is made a part of the conductor by beingsoldered effectively to the wire at each end. The end ofthe pipe is, in fact, entirely closed by solder, so as to makethe interior air-tight. As the soil in Memphis is always Aprh, 4, 1908.] STREET RAILWAY JOURNAL. 533 CAR HOUSE IMPROVEMENTS South of the repair shops there has just been erected abrick and steel car storage barn measuring 205 ft. x 372ft. The barn has a capacity for 200 cars. It consists of. BINGHAMPTON STORAGE TRESTLE moist, the pipe alone serves as an effective ground, and noground plates are used. GROUND RETURNSOverhead ground returns are being supplemented with■old rails laid underground in con-•crete. One such return already in-stalled consists of eight 103-lb. rails laid parallel in are bonded with three No. 0000circ. mil bonds at each joint. It is proposed to install anothersimilar return, which will be carriedto the power house from the northernportion of the city. This will prob-ably consist of 94-lb. 9-in. girder rails•embedded in concrete. The jointswill be bonded with three No. 0000Tjonds, and the rails will be crossbonded every 500 ft. The number ofrails laid parallel will vary fromthree to ten, according to the distancefrom the power house. POWER HOUSE IMPROVEMENTS The power house plans contemplatethe erection ultimately of an entirelynew station containing five 2000-kwunits. The installation of
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
