Service life of underground optical cable lines
On average, the lifespan of underground fiber optic cables spans 20 to 30 years, though many can last 40 years or more when installed and maintained properly. The replacement of overhead lines with underground power cable inherently mitigates some of these challenges by increasing the reliability, stability, safety, and, ultimately, resiliency of the grid. From FTTH optics to industrial applications, backbone transmission, and cloud data centers, fiber cables can last for decades under appropriate installation and handling.
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