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 399
Figs. 4.401 to 4,403.—Internal circuits of heater. As shown the heater wires are dividedinto three sections: A, B, and C, connected to the external terminals P. A three holesocket S has one conductor of a twin flexible cord connected to the two outer sockets,and the other to the middle socket. The…
Electrical engineering
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