International Library of Technology · Scranton, International Textbook Co. · leaf 313
at ratio the two voltmeter readingsshould bear to each other for a joint that is in good con-dition. If the reading across the joint is abnormally highas compared with that across the rail, the bond should berepaired. 33. Fig. 14 shows another method of detecting badjoints, which is similar in… … Fig. 14. carried about. The operator on the left is provided withtwo poles having pointed metal terminals. Flexible wireslead from these terminals to the box carried by the secondoperator, who also carries a similar rod connected to the box,as shown. This box contains an interrupter that…
Electrical engineering
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