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 78
It isused a great deal in factories, mills and buildings where theunsightly appearance of the wires exposed on the walls or ceilingsis of no consequence. 766 HAWKINS ELECTRICITY Oues. What kinds of wires are suitable for this methodof wiring? Ans. Either rubber covered or slow burning weather… … CIRCUIT Figs. 842 to 844.—Open or exposed wiring. Fig. 842, wires passing through beams. The holesare bored at an angle and wire run through in zig-zag course. Porcelain tubes are usedwhere the wire passes through beams; fig. 843, cleat work across beams, the cleats arecarried by boards attached to…
Electrical engineering
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