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 91
d be pro-vided with globes and spark arresters, as in the case of arc lamps on high voltage seriescircuits, except when the closed arc lamps are used. INSIDE WIRING 779 Wooden moulding should never be run in elevator shafts, or shafts ofany kind, and should never be run on the inner side of the… … g, I ipjl LAMP50CKCT Fig. 876.—Circular fixture block for outlet from moulding work on ceiling. When tapping outlets for feeder circuits, an iron outlet box with covershould be used, as shown in fig. 886. The one splice box is held upto the outlet box already installed by means of two long screws,…
Electrical engineering
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