Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 372
Fig. 414.—Wooden pole with pin in-sulators, and ground wire at top. Fig. 415.—Steel tower with suspen-sion insulators. resin oil after which the cable is sheathed with lead which keepsout moisture and at the same time protects the cable againstmechanical injury. The cable has to be flexible enough…
Electrical engineering
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