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), 1833-1928 · New York : T. Audel & Co. · leaf 293
.GROUND 7fl7777mW^ GROUND PLATE GROUND PLATE Fig. 3,274.—Simple bell circuit with ground return. In making the ground connection thswires are attached to ground plates as shown. Instead of using ground plates, a moreconvenient method consists of connecting the ground wires to a gas or water pipe.…
Electrical engineering
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