Hawkins Electrical Guide v. 04 (of 10) / 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

The cover image was created by the transcriber and is placed in the public domain.
THE THOUGHT IS IN THE QUESTION THE INFORMATION IS IN THE ANSWER
THEO. AUDEL & CO. 72 FIFTH AVE. NEW YORK
COPYRIGHTED, 1914, BY THEO. AUDEL & CO., New York.
Printed in the United States.
Classification —series system—danger in series arc light system—constant current system—parallel system—arrangement of feeder and mains in parallel system—series-parallel system—center of distribution— Edison three wire system —evolution of the three wire system—balanced three wire system—balancing of three wire system— copper economy in three wire systems —Dobrowolsky three wire system—modifications of three wire system—three wire storage battery system—three wire double dynamo system—three wire bridge system—three wire three brush dynamo system—Dobrowolsky three wire system—three wire auxiliary dynamo system—three wire compensator system— extension of the three wire principle —five wire system— dynamotor —connections of balancing set— balancing coils —distribution by dynamo motor sets— boosters and their uses — auxiliary bus bar.
Preliminary considerations— various wires —copper wire—iron wire—German silver wire— standard of copper wire resistance —relative conductivity of different metals and alloys—conductors—cable for elevator annunciators—covered conductors—rubber covered conductors—rubber insulated telephone and telegraph wires—weather proof conductors—twisted weather proof wires—precautions in using weather proof conductors—slow burning wire; where used—slow burning weather proof wire; where used; how installed—miscellaneous insulated conductors— safe carrying capacity of wire —pothead wires— circular mils —square mils—mil foot—lamp foot—ampere foot— center of distribution—wire gauges— B. & S. standard wire gauge—micrometer screw gauge—calculating gauge— table of various wire gauges —table of lamp feet for rubber covered wires—lamp table for weather proof wires—symmetrical and unsymmetrical distribution— wiring table for light and power circuits —table of wire equivalents; how to use—table of cable capacities— incandescent lamps on 660 watt circuits — tree and modified tree system of wiring—distribution with sub-feeders—wrong and right methods of loop wiring—table, of amperes per motor; of amperes per dynamo—calculations for three wire circuit— three wire circuit panel board —size of the neutral wire.