Electrical tables and engineering data; a book of useful tables and practical hints for electricians, foremen, salesmen, solicitors, estimators, contractors, architects and engineers (1916)
Horstmann, Henry Charles, Tousley, Victor Hugo, 1875- joint author · Chicago, F.J. Drake & co · leaf 261
mallowed above tracks. ELECTRICAL TABLES AND DATA 259 Trolley sections range from a few hundred yardsto several miles in length; heavy traffic zones areusually fitted with short sections. Poles range from30 to 40 feet in length, and wooden poles usuallyhave 7-inch tops. The rake of poles varies… … Figure 31.—Train Sheet. it may be cut in sections, each section being fed byits own feeder. Alternating current systems do notusually have any secondary feeders. The drop allowedin d-c. systems ranges from 10 to 25 per cent; for a-c.systems it is 5 to 10 per cent. The current used at any point can…
Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
