Electrical instruments and testing; how to use the voltmeter, ohmmeter, ammeter, potentiometer, galvanometer, the Wheatstone bridge, and standard portable testing sets (1907)
Schneider, Norman H. (Norman Hugh), Hargrave, Jesse · New York, Spon & Chamberlain; [etc., etc.] · leaf 229
is test. 206 ELECTRICAL INSTRUMENTS. If the potential at point L in Fig. 117 is foundto be 150 volts, then it is obvious that there is agradual drop of 150 volts along wire a until pointG is reached, where it falls to zero provided G isa neutral ground and there is no difference of poten-tial… … Fig. 118. between L and G, and if the distance between thosepoints be 100 miles it is further obvious that the dis-tance between L and F is 33 1/3 miles, or 150 volts — 100 volts X 100 miles 001 — =33^ miles. 150 volts 6 It will be noted that the accuracy of this test is affected by the ratio that…
Electric testing · Electric apparatus and appliances
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