Notes on the 60,000-volt underground network of the Union d´Ã\x89lectricité

This paper contains a description of the 60,000-volt underground cable network which has been successfully operated in the Paris district by the Union d´Ã‰lectricité for the past four years. The reasons why single-core cables were adopted for the distribution system are explained, and a number of details are given in regard to the construction of the cables, the method of laying, and the operating conditions, both electrical and thermal.