High-voltage distribution in rural areas

The intention of this paper is to review in general form the possibilities of high-voltage distribution in rural areas, and details are given of the development of overhead line design which incorporates both high-voltage and low-voltage lines on the same pole. A brief examination is made of the use of steel conductors, and comparisons are drawn with copper conductors. Graphs and tables which have practical value to both distribution and constructional engineers are included in the paper, as also are sketches showing design for light-construction h.v. and combined construction h.v./l.v. lines. The advantages offered by, and the steps it is necessary to take in order to obtain the full benefit of, the modifications of the Overhead Line Regulations covered by the Electricity Commissioners´ circular letter M.2854 dated 24/9/37 and the Post Office Regulations Form E-in-C. 229 (November, 1938) are explored in detail. In preparing the paper the author has endeavoured to concentrate upon essential factors in the design, construction and economics of h.v. distribution lines, giving a minimum of attention to purely theoretical points.