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 146
laced in position on them, is filled with voltax, whichhardens rapidly and forms a solid insulating material through-out the conduit. 834 HAWKINS ELECTRICITY Wrought Iron or Steel Pipe Conduits.—These are formedof pipes similar to gas or steam pipes, ^^•ith screw or other con-nections. They are… … FjGS. 981 and 982.—Porcelain bridgework or carriers for supporting underground conductoi s. Oues. What is the ordinary method of construction? Ans. A trench, the w4dth of which will depend upon thenumber of pipes to be laid, is first dug in the ground, and afterits bottom has been carefully…
Electrical engineering
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