This document has been developed as a guide for the design@ installation@ and protection of wire and cable systems in substations with the objective of minimizing cable failures and their consequences. This guide is not intended for use in the design of wire and cable systems in generating stations@ which is adequately covered in IEEE Std 422-1986 1 and IEEE Std 690-1984 . Guidance for wire and cable design for gas-insulated substations (GIS) is available in IEEE Std C37.122-1983 .