Handbook for the use of electricians in the operation and care of electrical machinery and apparatus of the U.S. seacoast defenses (1902)
United States. War Dept, Anderson, George Lucius, 1849-1934 · Washington, Govt. Print. Off. · leaf 204
signal pur-poses only. (4) In contact only with double petticoat porcelain or glass insulators and runat least 1 foot apart and in such manner that water can not cross-connect. (5) Protected when necessary from accidental contacts with other lines byinsulated, dead guard, iron wires. (6) Led into… … 204, 205, 206. (8) Sag = 1 to 2 per cent of distance between poles, depending on extremes ofheat and cold. (9) Signal wires unavoidably paralleling heavy current lines are stretchedalong lowest cross-arms. See Line Construction, page 155. (10) A lightning-arrester in plain view is placed alongside…
Electric machinery · Searchlights · Coast defenses
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
