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 98
he conduit or lining of same will not be injured. The radius ofthe curve of the inner edge of any elbow must not be less than three and one-half inches.Must have not more than the equivalent of four quarter bends from outlet to outlet, thebends at the outlets not being counted. 786 HA WKINS… … FG. 889.—Conduit box showing arrangement for combination side outlet with open cover.Outlet or junction boxes are of two general types: 1. those which are made for a particularposition and have a given number of outlets, and 2, those which have a variable number ofoutlets which are plugged with…
Electrical engineering
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