International Library of Technology · Scranton, International Textbook Co. · leaf 451
Fig. 41 … Fig. 48. bring the lamp over the center of the street. A pulley isplaced at the center and another on the side pole and the 84 ELECTRIC LIGHTING. § 18 poles are usually set at diagonally opposite corners of thestreet intersection. The span or suspension wire is usuallyof -/^-inch or § -inch…
Electrical engineering
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