Installation of high tension cables

More or less has been said during the past few years about the installation of high-tension cables. But little emphasis has been placed upon the necessity for extreme care in installation, although as a matter of fact the burn-outs, if any, appearing when the cable system is first subjected to operating or test voltage, are almost entirely due to faulty joints or to careless handling at the time the cable is being pulled into the ducts or arranged in the manholes. This is a matter that the purchaser of cable often overlooks, due no doubt to the fact that a careful analysis of cable breakdowns is rarely undertaken. Even when it is attempted, the results are often of negligible value in view of the extended areas of burn-outs, comparatively few systems having as yet been installed in which, by the aid of grounded neutrals, limiting resistances and ground-current circuit-breakers, the area of burn-out is localized and the usual consequential burn-outs eliminated.