Direct buried cable should be sized for how many years?

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Multiple Choice

Direct buried cable should be sized for how many years?

Direct buried cable is sized based on a defined design life to guide budgeting, capacity planning, and maintenance milestones. The standard practice in outside plant design is to size direct buried cables for a 20-year service life. This duration balances the expected aging of cable jackets and insulation, environmental wear, and the network’s upgrade cycles, giving a practical window for renewal or upgrade without overcommitting upfront. Choosing a shorter life, like 10 years, would push unnecessary early replacements and higher costs. Opting for a longer life, such as 30 or 40 years, tends to exceed realistic performance and maintenance planning, making future upgrades more disruptive and less reliable. Therefore, 20 years is the standard design-life target.

Direct buried cable is sized based on a defined design life to guide budgeting, capacity planning, and maintenance milestones. The standard practice in outside plant design is to size direct buried cables for a 20-year service life. This duration balances the expected aging of cable jackets and insulation, environmental wear, and the network’s upgrade cycles, giving a practical window for renewal or upgrade without overcommitting upfront.

Choosing a shorter life, like 10 years, would push unnecessary early replacements and higher costs. Opting for a longer life, such as 30 or 40 years, tends to exceed realistic performance and maintenance planning, making future upgrades more disruptive and less reliable. Therefore, 20 years is the standard design-life target.

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