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 168
the location ofswitches, etc. 856 HAWKINS ELECTRICITY Oues. If an outlet is to be placed at the center of aroom, how is the center of the ceiling located? Ans. It is first located on the floor, then transferred to theceiling by means of a plumb bob. Oues. What is the first operation in making a… … Pig. 1,003.—^Mew of completed pocket and ceiling outlet showing method of bringing out the wires. A long bit about ]4, inch in diameter and about 18 inches long is used.The hole bored in the floor above will show where to take up the boardto install the wires. Oues. How is a pocket opened above the…
Electrical engineering
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