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- · New York, T. Audel · leaf 80
roof paint. Ques. How far apart should the wires be placed? Ans. When installed in dry places and for pressures below300 volts, the insulators should separate the wires 23^ inches 768 HAWKINS ELECTRICITY from each other and 3^ inch from the surface along which theypass. For voltages from 300 to… … Figs. 848 to 850.—Crossing of wires. Where wires cross each other, tubes should be usedexcept in case of large stiff wires as in fig. 848; here one wire may be bent down and carriedunder the other; fig. 849, short bushing strung on the wire—this method is usually un-satisfactory, especially where a…
Electrical engineering
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