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 23
1,542 HAWKINS ELECTRICITY Series Parallel Circuits.—The arrangement of circuits ofthis kind is shown in fig. 2,134; they are used to economize incopper since by joining groups of low pressure lamps in scriesthey may be supplied by current at correspondingly higherpressure. Thus, if in fig. 2,134,… … Pig. 2.138.—44,000 volt lines entering the Gastonia sub-station of the Southern Power Co.The poles used are of the twin circuit two arm type, built of structural steel, their heightvarying from 45 to SO feet, the latter weighing 9,000 pounds each. These poles havetheir bases weighted with concrete.…
Electrical engineering
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