OVERHEAD & UNDERGROUND Power Lines
The differences between over- head and underground power
linesBy Tom Tate installing the power lines that Electric Cooperative members has its place.
- - - - tricity.
at some of the
Determining if - - park or historical area. There are lines for a variety of reasons.
work well when appearance is not voltages are higher
THE PROS AND CONS
POWER LINES OVERHEAD
PROS
Lower cost Quicker construction Easier to spot damage and faults Less expensive to repair and upgrade Can be built in any terrain Any voltage can be placed overhead
CONS
Susceptible to wind, ice and snow More vulnerable to damage from trees and vegetation, which requires right of way trimming
Vulnerable to blinks when animals and branches contact lines
Susceptible to damage from vehicle collisions
Less attractive Photo: Artur Pokusin
UNDERGROUND PROS
Not vulnerable to damage from tree branches Does not interfere with views No right of way (tree trimming) required Less susceptible to damage from vehicle collisions Not impacted by wind, ice and snow Less vulnerable to blinks when animals and branches contact lines
CONS
More expensive to build Susceptible to flooding Difficult to locate faults Expensive to repair Fed by overhead lines at some point, making the lines vulnerable to outages and interruptions
Limitations on voltages that can be buried underground Can be vulnerable to dig-ins
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