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 248
from the formula A -j R. To avoid the necessity of solving 1000 — /i A X in each case the fraction :, a table is fur- 1000 — -4 nished with the set, giving the value of this fraction LOCATING FAULTS IN WIRES. 225 for each value of A. The resistance is accordinglydetermined in each case by simply… … Fig. 129. This method is to be used in locating faults wherethere are two wires having equal resistance, in oneof which there is a fault. Connect and set switchesas shown in Fig. 129. It will be remembered thatE is equal to the resistance of the wire A B. Fromthe symmetry of the arrangement it will…
Electric testing · Electric apparatus and appliances
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