How do utility companies tighten powerlines?
363800
They don't. When designing power cables and distance between the towers/poles any expansion of the power lines due to heating or cooling are taken into account.
1069893
They're called Powerisers.   http://eng.poweriser.co.kr/company/preface.html
498960
its the cables that use to carry the electricity. see any book on power system, such as stevenson
364395
Your best bet is to contact your local utility like Edison or PG&E.
619476
Only the Electric Power Company can answer this.\n\nAssuming your inforrmation is correct, and this involves RAIN only, not high wind, it is possible there is an Underground Line that shorts out.\n\nWhatever it is, it sounds like something that can be fixed, but this will only happen if you organize the members of the community and invite the Power Company representative to meet with them and explain why this happens.\n\nMake sure the TV News crews are there.
1059903
Tree Branches.....\n\nThey switched because power lines are uniform in size, easy to grip, and there are no leaves in the way so you can see if a predator is sneaking up on you, or spot a tasty snack easier.
143714
because they are not grounded, in fact, u can sometimes see utility workers high up on the tension wires with thousands of volts going right over them
762650
Please see the Wikipedia article on Electric Power Transmission below.\n\n- An electric power engineer
22663
Either above ground or below you have loss dependent on the length of travel.  It is more efficient to run at higher voltages, that is why there are step up transformers at the beginning of long runs and step down transformers from the main lines to the house lines.\n\nSome loss occurs as a result of heat energy
704013
CHeck with your local electric company, sometimes you can get money back when you lose food, etc.. in storms, particularly when it takes several days to get your electricity back on .
184708
Well obviously it has to be a production line, so the only way you could do it is several machines in a row that bend each link a little more at a time forming a near full clamp, then it would piece them together and run it through a final one to  seal them and weld them together... maybE?
78736
By law, electric power companies are given monopoly control.  By its very nature, electric service is not something you can casually 'change' like you would your long-distance provider.  So unless you exit the public grid completely, you're stuck with Alleghany Power.
749103
Generally speaking if power linesrun through your property (residential) it can lower the value 10%-20% over nearby homes of the same specifications.  Like anything though with homes a house is worth what someone is willing to pay, so if they do not care about the lines then you will get full market value.
888623
by area of wire you can.
114429
Tie weights to it and let them stretch it out to the length you want.
93370
Under average conditions a power line carries current to \nan appliance designed for the voltage . Cross country power lines operate for supply to cities at very high voltages and if dropped into the salt water would complete the circuit to ground overloading the circuit causing a circut breaker to disconnect .if the breaker fails the \n"short circuit" would overload the supply equipment and\nburn it out. The ultimate breaker may also be a fuse.
652413
Engineers use a cable and pulley system to pull the cables that are on the ground up to the insulators on the very tall towers.  Then they pull the cables at the end of the respective run to tighten them to specifications.