CASE STUDY

Major Utility Saves $157 Million & Improves Reliability with Underground Cable Testing Program

The Situation

A major southeastern investor-owned utility had an ever-increasing failure rate – a range of 24 failures per 100 miles per year. Given that there are 16,000 miles of underground cables, with more than 1,000 miles installed before 1986, the cost was significant.

After nearly three years of systematic cable replacements based on age, failure frequency, and construction type, the utility noted that while the failure rate was decreasing, their cost per avoided failure had increased by over 250%, forecasting an annual spend of $20 million on system outages and cable replacements.

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