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 108
own. Where ring supports cannot bearranged, the application of frame bending methods give the most satisfactory results. 796 HAWKINS ELECTRICITY Armoured Cable Wiring.—Where a conduit system cannotbe conveniently installed, armoured cable is used. Armotiredcable is made by winding steel strips over… … Figs. 914 and 915.—Greenfield flexible steel armoured conductors. The armour is composedof convex and concave galvanized metal strips, wound spirally upon each other and overthe insulated conductors. A gasket is placed between the inner and outer metal strips,thus further rendering the conductor…
Electrical engineering
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