Secondary service cables form the last link in the power grid by interconnecting the distribution transformer to the end user’s service meter. For many utilities with underground services, failures on this class of cable account for over half of their total cable-failure count and are on the rise. Utilities would traditionally be faced with a decision to continue to make ad-hoc repairs or create a replacement program.

This paper introduces silicone-gel injection as a third option for utilities to consider. The injection of silicone gel purges water from the conductor and forms a physical barrier that protects against water intrusion and corrosion. Silicone-gel injection is a non-invasive solution that causes minimal disruption to neighborhood homes and businesses.