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 290
and 22 wire may be used, but a wire smaller thanNo. 18, is not strong enough mechanically, and its resistance isso great that it requires too much battery pressure. The various kinds of covered bell wire are commonly known asoffice wire, annunciator wire, weather proof wire, etc. Office wire… … Fig. 3 268. Paper weight type multi-push button suitable tor desk use. with paraffine. The weather proof wire is the same as that used forelectric light wiring. For the general line of bell work, the braidedoffice wire is the best, as the annunciator wire is too easily injured,while the weather…
Electrical engineering
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