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 60
CURRENT SYSTEMS 1,579 system. This is the case also with any of the other two ph,systems, except the two phase three wire system. .ase In this system two of the four wires of the four wire two phase sys-tem are replaced by one of full cross section. The amount of copper required, when compared with… … Fig. 2,189.—Twin circuit aermotor towers carrying 44,000 volt conductors (SouthernPower Co.). These towers vary in height from 35 to 50 feet, and the circuits are trans-posed every 10 miles. The towers are assembled on the ground and erected by means ofgin poles. They are normally spaced 500 feet…
Electrical engineering
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