We describe these changes as system upgrades, or overhead hardening. This work reduces ignition risk by nearly 67% on a line once completed. It is also a useful tool in areas where powerlines cannot be moved. Due to the frequency and severity of recent storms across the country, industry attention has been centered on making the distribution system more resilient so that it will experience less damage during extreme weather events. EPRI is currently undertaking a multi-year research project focused on. This standard is a comprehensive analysis of site hardening requirements and was compiled by the Association of Public Safety Communications Officials (APCO) International. The American National Standards Institute (ANSI) approved this standard on June 11, 2019. As the construction unit responsible for electrical equipment installation, it is essential to carry out the finalization, procurement, and installation of distribution boxes in accordance with. ed by catas-trophic damage caused by a natural disaster. Such performance is quantified by a resil ence measure associated with the operability trajectory. The distribution system hardening. During the construction and installation process, the methods to solve and prevent the failure of the distribution box include: Quality inspection: Make sure the distribution box and its components meet the standards, check whether the wiring is firm, and whether the materials are qualified. Here's what to expect in your area.