Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 546
ackreturn. The contact rails must be treated like a double-trolley wire, and calculationsfor feeders and feeding in points can be made after the methods explainedfor overhead circuits and feeders earlier in this chapter. Feeders and mainsare usually laid in underground conduits for this work, and… … 534 ELECTRIC STREET RAILWAYS.
Electrical engineering
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