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 251
Fig. 132.To Locate Opens, Using Buzzer and Telephone, 228 ELECTRICAL INSTRUMENTS. In this case the slide resistance circle A B is usedwithout either of the resistances E or R. Connectto binding-post 1 the broken wire and to binding-post 2 a perfect wire having the same capacity permile. Connect… … Fig. 133. mum sound in the telephone we will have the A arelation -^ — j, where a is the length of the broken wire and L that of the whole cable. From this,a = __ . L. As in the case of resistances, the LOCATING FAULTS IN WIRES. 229 value can be read from the table. The 1000 - A connections are…
Electric testing · Electric apparatus and appliances
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
