Question

if overhead cables are being laid in summers , should they be tightened up or left a little loose , why ?

Answer 1

Answer:

They should be left a little loose

Explanation:

If they are tightened up then,Then in summer they would break but if they are left loose then they will have space to expand

HOPE IT WAS HELPFUL

Answer 2

Answer:

Concept:

      When heated, the conductor material (copper, aluminium, or whatever) expands. The power line between two towers grows longer as a result of thermal expansion as the temperature rises, and the line sags as a result of the added slack.

Explanation:

• Cables are effective heat conductors. The cable shrinks in the winter because the temperature of the atmosphere is lower. As a result, the cables are frequently left slack so that tension from the cables won't cause them to break on chilly days.
• Heat is dissipated as electricity is being transmitted. Through high voltage transmission, cable heat is reduced to a minimum. It is required to let the cables loosen up a little bit due to the impact of weather and internal cable temperature.
• Your wire and cable may suffer negative impacts from extreme cold or heat, which may result in the product being brittle and rigid. When cables are put in inappropriate settings, freezing temperatures cause the cables to stiffen and crack.
• Due to increased power consumption, the lines are frequently heavily laden, and the conductors, which are typically constructed of copper or aluminium, expand when heated. The transmission line structures sag as a result of that expansion's increased slack between them.

Effect of temperature increase on overhead transmission line: Sag rises as temperature rises. The sag is the distance between a conductor that is linked between two poles or towers and the lowest point of the poles' or towers' highest point.

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