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Every material expands in heat and contracts in cold. The amount of change depends on the material in question. It is important in construction to take this into account.
If the cables where hung too tight in the hot summer, when it got cold in winter they would be unable contract enough and would snap. If they where hung loose in the winter, then in summer the cables would sag far too much. An engineer must take this into account when selecting the material used, and planning how much slack to leave to ensure that they will be reliable in hot and cold conditions.
Wiki User
∙ 13y ago
Wiki User
∙ 7y agoDuring cold winter weather, the wires will contract. If the wires were installed too tight during summer, winter contraction would snap the wires or damage the installation, even bringing down poles and pylons.
Wiki User
∙ 11y agobecause when they're heated up they expand and that makes them sag or bend
Wiki User
∙ 11y agoIn summer - the wires sag because the heat of the sun makes them expand or stretch slightly. In winter the reverse happens - and they become tighter.
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Why do overhead wires hang with a slight sag in summer time and hang tightly in winter?
Overhead wires expand slightly in the summer when the temperature is higher, so they become a little longer and hang lower. Clearance height rules must be met at the maximum expected temperature.
Why would it not be a good idea to hang new telephone wires in the summer?
Summer heat makes the wire longer and winter cold will make it shorter, because metals expand when heated and contract when cooled, but the installers know all about that and they allow for it.A more shocking fact is that summer thunderstorms sometimes send down a bolt or two of lightning long before the main part of the storm arrives. That would not be a good time to be near long wires or tall poles.
In the summer the power lines hang down between the posts then why dont the engineers tighten them up?
When objects are cooled down, they contract. Engineers who put up telephone wires in the summer leave the wires hanging slack so that in winter, the wires have a chance to contract without pulling the poles and damaging property or infrastructure.
When was Hang Loose With The Surfin' Lungs created?
Hang Loose With The Surfin' Lungs was created in 1996.
What is Hang loose chain of shield volcanoes?
The Hawaiian Islands are the "hang loose" chain of shield volcanoes.
Why do telephone wires hang loosely in summer time and straight and taut when it is cold?
Telephone and electrical wires "sag" in the summer, in hot weather. This is because the wires, like most materials, expand when they are heated. The additional length means that the wires lose tension and sag or droop. In the winter, the wires become shorter, and they may break if too tightly strung.
What to do in the summer?
I will hang around and go to pools
What is the Hawaiian translation of hang loose?
The Hawaiian translation of "hang loose" is "Shaka" which is commonly used as a gesture of friendship, gratitude, and solidarity.
How do ski lifts hang on to the lift cable?
Metal wires / winches
What are the huge flocks of blackbirds that mostly hang out on electrical wires?
Crows
What does hang loose mother goose mean?
Titi mo malaki
What you can do in summer?
sing,play outside , hang out with freinds ,sing
