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 105
Fig. 903.—Service entrance to interior conduit system; showing method of preventing moisturereaching the interior of the conduit sy-item. Fig. 901.—Outlet to arc lamp from conduit by use of condulet. The wires are brought outfrom the conduit system at a distance of 2^2 inches apart. Conduits are…
Electrical engineering
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