Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 204
Fig. 331. Fig. 332. Fig. 331.—Connections for two-wire static ground detector. The principle is the same asthat of the quadrant electrometer. As long as the e.m.f. between the ground and each line isthe same* the hand remains in the upright position, pull on the vanes being balanced. In caseone…
Electric wiring
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