Comparison between Overhead and Underground Transmission System

Compare Overhead and Underground transmission system

ParticularOver head systemUnder ground system
Public safetyLess safeMore safe
Initial costLess expensiveMore expensive
FaultsFault occur frequentlyvery rare chance of fault
FlexibilityMore flexibleLess flexible
Fault locationEasily locatedcannot easily located
RepairsEasyDifficulty
Useful lifeLessMore
Maintenance costMoreLess
Interference with communication lineMoreLess
AppearanceNot goodGood

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