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 236
have two crossed conductors ina cable 1000 feet long. One of the conductors in-volved is looped to a good conductor at one end ofcable, and a measurement is made from the other LOCATING FAULTS IN WIRES. 213 end. A simple loop resistance measurement is first made, as in Fig. 120. Say that our result… … Fig. 121. If it now takes 150 ohms in R to effect a balance, a. T7 o K (2.5 + 150) X 10 QO then F= 2.5 - 1Q00 , 10— = •> where F 1S resistance to the fault. This divided by what theconductor measures per foot would give the dis-tance to the fault. Let us assume in this instance that our…
Electric testing · Electric apparatus and appliances
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
