Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 96
!5-o -o bcii 2 MtSw C E &.£ b2<c-n-a-3 g S^? «•£ HJ-- aCrt 60& C4)5c rt^ t TESTING AND TESTING APPARATUS 515 Loop Test.—This is a method of locating a fault in a tele-graph or telephone circuit when there is a good wire runningparallel with the defective one. In the process, the good… … BATTERY KEY Fig. 595.—The Murray loop test. The apparatus is connected as in the figure. The rheostatof the bridge is used in place of the second arm to permit large adjustment. X and Y arethe resistances of the cable between the fault and the points 1 and 2 respectively. 1. The Murray loop; 2. The…
Electrical engineering
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