What is the average lifespan of cables when installed underground?

Study for the BICSI Outside Plant Designer Exam. Enhance your knowledge with flashcards and multiple choice questions. Each question includes detailed explanations and hints. Ace your exam with confidence!

The average lifespan of cables when installed underground is typically around 50 years. This longevity is attributed to several factors related to the installation environment and the materials used in underground cable construction. When cables are buried, they are subjected to fewer environmental stresses compared to overhead installations. They are protected from UV radiation, wind, and physical damage from falling branches or animals.

Additionally, modern underground cables often incorporate advanced materials and insulation technology that enhance their durability and resistance to moisture, chemicals, and temperature fluctuations. Over time, this contributes to their ability to maintain performance and functionality over extended periods.

Understanding the lifespan of underground cables is crucial for planning maintenance, replacements, and budgeting for long-term infrastructure investment in outside plant design. By knowing that these cables can last up to 50 years, designers can make informed decisions about the materials and installation practices that will yield the best long-term results for network reliability and performance.

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