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 542
ro-tection. Eighth —It is better to use a separate conductor for each set of pipes tobe protected. Ninth—Connection only at the power station to water or gas pipes willnot insure their safety. Tenth —Connection between the pipes and rail, or rail return wires out-side of the danger district, should…
Electrical engineering
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