Guidelines for the use of underground cable systems and overhead ...

• Cost of Installation: Underground network installation is more expensive due to cable and road restoration costs.
• Fault Location Identification & Repairing Time: Identifying faults in underground cables is more challenging and time-consuming.
• Cost of Repairing a Fault: Repairing faults in underground cables is more expensive than in overhead lines.
• Line Outage Durations: Underground system repairs can lead to longer customer outages.
• Line Modifications: Underground lines are more difficult and expensive to modify.
• Effect from Weather Conditions: Overhead lines are more prone to damage from severe weather conditions.
• Range of Electromagnetic Fields (EMF) Emission: Underground cables produce less external magnetic field than overhead lines.
• Space Requirement: Underground cables do not require physical ground space, unlike overhead lines.
• Hazard to Wildlife: Underground cables pose no hazard to wildlife compared to overhead lines.
• Illegal Connection/Theft of Power/Pilferage: Underground cables are less susceptible to illegal connections or theft.
• Aesthetics: Underground cables provide a cleaner and more aesthetic view compared to overhead lines.
• Flexibility to Increase Line Capacity: Overhead lines can be easily upgraded, while underground cables need to be supplemented or replaced.
• Line Life: Insulation deterioration is faster in underground cables compared to overhead conductors.
• Safety: Underground cables do not require minimum safety clearances like overhead lines.

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