. The Street railway journal . that in thelater test (he bodv of the pole contained less moisture than in the 45<5 STREET RAILWAY JOURNAL. [Vol. XXIV. No. 13. first test. The latter test also seemed to show that at least 75per cent of the total drop in potential occurred at the point ofcontact between the brace or lag screw and the pole. It should be noted that as stated previously the shock obtain-able by a human being would be considerable in excess of that in-dicated by a Weston voltmeter and would be correspondingly lessthan that indicated by a static voltmeter. The above results were o
. The Street railway journal . that in thelater test (he bodv of the pole contained less moisture than in the 45<5 STREET RAILWAY JOURNAL. [Vol. XXIV. No. 13. first test. The latter test also seemed to show that at least 75per cent of the total drop in potential occurred at the point ofcontact between the brace or lag screw and the pole. It should be noted that as stated previously the shock obtain-able by a human being would be considerable in excess of that in-dicated by a Weston voltmeter and would be correspondingly lessthan that indicated by a static voltmeter. The above results were obtained by using a line voltage of20,000, but the effect of increasing or decreasing the line voltagewould be to modify the results obtained in practically the sameproportion. The most interesting experiment performed was for the pur-pose of determining the possible danger to persons standing on theground and holding a hose throwing a stream of water on either atrolley wire or a high voltage transmission line. For the purpose. I DIAGRAMS SHOWING TEST LINE of this demonstration a fire engine was secured from the village ofFrankfort and placed so as to take water from the Erie Canal,which is within about 300 ft. of the sub-station. A line of 3^-inch hose with a \% in. nozzle, was carried to the experimental line,the nozzle being placed at an angle of about 60 degs. and throwingthe stream directly on the 600-volt trolley wire, and later on the20,000-volt transmission wires. In neither case was it possible toobtain the slightest shock even while standing on the rail or thewet ground and holding the brass nozzle in bare hands. Thelength of the stream from nozzle to trolley wire was about 20 ft.,and about 30 ft. to the transmission wires. It was also found that it was impossible to short circuit the20,000-volt line even by throwing the stream so as to strike twoof the wires, which as stated previously are only 24 ins. apart;nor did an} change in the ammeters in circuit indicate that
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
