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 225
resistance of thecross between the two wires can be neglected. Solong as it furnishes a path for sufficient current toenter the loop in order to give a readable galvan-ometer deflection on an unbalanced condition of oneor two ohms, then it does not matter whether itsresistance be 1 or 1000 ohms so… … Fig. 114. When a third good wire is not available for thismeasurement, however, a reasonably reliable loca-tion of the trouble can be made by tests outlined inFigs. 114 and 115. In these tests the resistance ofthe fault is taken into account, and so long as it doesnot change between the two tests…
Electric testing · Electric apparatus and appliances
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