Insulated Electric Cables

Abstract

ALTHOUGH the manufacture of electric cables is a comparatively recent industry, the progress that has been made in their design and method of manufacture is most satisfactory. In the early days of electric lighting it was common to use bare conductors laid in pipes filled with oil, the wrappings of the conductors being used simply as spacing materials. In the Edison system, for example, the conductors consisted simply of copper rods wound over with jute rope and drawn into iron pipes. The Crompton system also, which consisted of bare strip conductors in a culvert, was extensively used in the early days, and some of it is in use to-day after thirty years' service. The great improvements that have recently been made in cables are mainly due to the great encouragement given by the manufacturers to mathematical and physical research. In this volume Mr. Beaver discusses the materials used in the manufacture and the design of electric cables. An excellent resume is given of the latest practice and the most modern theories which are used in design.

Insulated Electric Cables.

By C. J. Beaver. In Two Parts. Part I. Materials and Design. Pp. 264. (London: Ernest Benn, Ltd., 1926.) 36s. net.