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 119
sually followed, with holes for the pins atcenter points three inches from either end and a space of 28 inches be-tween them in the center. Ques. How must electric light and power wires beplaced when wired on telephone or telegraph poles? Ans. They must not be put on the same cross arm with… … Fig. 937.—Portable platform with rigging as used by linemen in wiring and making repairs. Poles for Light and Power Wires.—In selecting the style of pole necessary for a certainclass of work, the conditions and circamstances should be considered. Poles may be dividedinto three classes, the size of…
Electrical engineering
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