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 44
large P.B.X.switchboards, the distributing frame shown is not used, the connections being made at theregular cross connection box. The adjustable transmitters, and the head receivers andcords, are shown on this two position switchboard. THE TELEPHONE 2,137 to the switchboard. Fig. 2,944 shows the… … Fin. 2,943.—View showing method of wiring the distributing frame. The distributing frame iswired to the switchboard with flexible wire cables and to the street by lead covered cables.In cities, the lead cables terminate at back yard cable boxes and in the country at polecable boxes. A subscribers…
Electrical engineering
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