Ground wire was placed at the top of the line structure so that it had a shade angle of 45 degrees to the outside conductors. It might be a f-inch stranded galvanized plow steel or bimetallic wire. The ideal construction comprised ground wires atanbsp;...
|Title||:||Census of Electrical Industries: 1902, 1907, 1912, 1917, 1922, 1927|
|Author||:||United States. Bureau of the Census, Frank Lin Sanford|