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 308
point E, the break will be located at A, some-where between D and E. Ques. What is usually the cause of short circuits? Ans. They are often caused by double pointed tacks and ELECTRIC BELLS 2,399 small staples cutting through the insulation and injuring thewire. This is often the result of… … FIGS. 3,296 to 3,800,—Saddled staples for securing bell wires.
Electrical engineering
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