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 101
s to cover the joint, and is simply an insulating ring placedbetween the canopy and the ceiling. It is in contact with the fixture; hence, it is importantthat it be insulated from metal ceilings, or else all the benefits derived from an insulatingjoint will be lost. INSIDE WIRING 789 Ques. How is… … .ViG. 894.—Section of flooring illustrating use of fishing hoot. In fishing wires, punch a hofethrough the plastering at the required position, being careful that there is no studdingat that place. Use a brad awl and cut the hole large enough to permit running of thewires. With a short length of…
Electrical engineering
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