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But underground lines have their vulnerabilities. Flooding can cause widespread failures. When Charley approached land, the Tampa Electric Co. shut down power to the city's downtown businesses because of fears that a saltwater storm surge would damage the underground network. Buried service is superior during high winds, but lines and poles perform better during heavy rains. The roots of a toppling tree also can pull out lines and break connections. Repairmen complain that it's often difficult to locate problems in buried lines that would be obvious if they were strung overhead. Underground lines require special equipment and crews to locate faults and a separate crew to dig up the lines.
The Washington-based Edison Electric Institute released a study this year comparing the two distribution methods. Researchers found that some customers served by 40-year-old overhead lines had better reliability than customers with 20-year-old underground service. Two Maryland utility companies have switched from underground lines back to overhead networks to improve reliability. "When compared to overhead power systems," the report said, "underground power systems tend to have fewer power outages, but the duration of these outages tends to be much longer. The bottom line - reliability benefits associated with burying existing overhead power lines are uncertain and in most instances do not appear to be sufficient to justify the high price tag."
Originally posted by ChaoticOrder
reply to post by phroziac
Tesla coils can light up lightbulbs that arent even plugged into anything that are beyond the distance they can arc to. Theres a famous picture of tesla holding a lightbulb thats lit up......llno arcs.
I am aware of that much. I was asking about the physics of how that works.