The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . TTTTTT/ Fig. 8.—Cross-section of Open Conduit Road (American type). ductor rails are installed in the conduit 6 in. apart, the flat facescorresponding to the upper surface of the T being placed towardseach other. Elaborate provisions for drainage and inspection arealso provided, depending upon the situation of the tracks and natureof the street. The current is fed to the conductor rails by heavycopper conductors of from to 1,000,000 circular mils cross-section, insulated and lead-covered,
The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . TTTTTT/ Fig. 8.—Cross-section of Open Conduit Road (American type). ductor rails are installed in the conduit 6 in. apart, the flat facescorresponding to the upper surface of the T being placed towardseach other. Elaborate provisions for drainage and inspection arealso provided, depending upon the situation of the tracks and natureof the street. The current is fed to the conductor rails by heavycopper conductors of from to 1,000,000 circular mils cross-section, insulated and lead-covered, laid in ducts alongside of orbetween the two tracks of double-track systems. Connexion is. V77/. (From J. H. Riders Ekctric Traclum, by permission of Whittaktr 8: Co )jrjQ_ g_—Cross-section of Stud. Skates and Macnets. Lorain System. TRAMWAY 163 made between the cars and the conductor rails by means of a plough, carried by a hard steel plate, which is channelled to re-ceive the insulated wires leading up to the controller on the car. Theplough carries two cast-iron rubbing-blocks, which are pressed out-ward into contact with the conductor rails by springs, the two being,of course, very carefully insulated from each other and from the othermetal-work of the plough. It has been found expedient in practiceto reverse the polarity of the current used on tnese conduit roadsfrom time to time, since electroI>-tic deposits, formed by smallleakage currents in the vicinity of insulators, o:c., are thus dissolvedbefore they become a source of trouble. Great difficulty is experienced with all conduits in keeping themclean and free from water. On the London tramways a sump hasbeen f
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectencyclo, bookyear1910
