Why do the wires between the pile on towers hang?

Tension a force that exist in a string that is under the action of two forces in opposite direction. Thus a cable hanging on a pole is under tension and would be under more tension if the cables are to made tight which would make the cables to cut easily when little contraction or expansion occurs.

Why do the wires between the file on towers hang?

This is to minimize the tension in the wires.

Why are the cables left loose between the poles?

Cables are good conductor of heat . In winter , the cable contract due to lowering in atmospheric temperature . So, the cable are often left loose so that they can't break in cold days due to tension in cables.

Why do wires hang on poles in summer?

Electric cables hang loosely during summer due to the expansion process and they contract during winter due to the contraction process. Explanation: Electric cables are the solids which exhibit the property of contraction and expansion.

Why telephone and Electric wires are always kept loose between utility poles?

Answer:Electric wires are kept loose to prevent them from snapping in winter.

tower of power

Why are telephone wires and electrical wires not placed together?

When a solid gets heat it expands and on cooling it contracts. Due to this electrical and telephone cables are strung out a little loose so that in winter, as cables contract due to cooling of atmosphere and snapping may occur, can be avoided.

Why do electrical wires sag in the summer and hang tight in the winter?

Electrical wires stretch and sag during summer, because it expands on heating. Electrical wires stretch and sag during summer, because it expands on heating.

Why are the telephone wires hung loosely?

Telephone wires are kept slightly loose when they are laid because heat. ... Therefore, without a slack they could become too tight and break in winters or pull loose from their anchors in summers . This is the reason why wires are kept slightly loose when they are laid.

Why do telephone wires sag in summer?

Since metals expand with a rise in temperature, therefore telephone wires sag in summers. The wires are intentionally left a bit loose otherwise in winters they would contract and break. Thermal expansion is the tendency of materials to expand when exposed to heat.

Why are the wires that are connected in the posts outside are lightly saggy not tightly tied by the line man?

The reason is to minimize the tension in the wire. The wires expand when exposed to intense heat from sun and contract during cold weather. Stretching the wire and connecting to the poles will make the wires loosen up and tear easily.

What happens to electric wires during cold days?

RATINGS MATTER. Extreme cold temperatures can have adverse effects on your wire and cable, causing them to temporarily become brittle and inflexible. In these conditions, some cables will stiffen and even crack if they are installed below recommended temperatures.

What are the cables on a telephone pole?

Why are shoes on power lines?

In some neighborhoods, shoes tied together and hanging from power lines or tree branches signify that someone has died. The shoes belong to the dead person. The reason they are hanging, legend has it, is that when the dead person's spirit returns, it will walk that high above the ground, that much closer to heaven.

Why are there 3 power lines?

A three-wire three-phase circuit is usually more economical than an equivalent two-wire single-phase circuit at the same line to ground voltage because it uses less conductor material to transmit a given amount of electrical power.

What are the balls on power lines called?

Marker balls are colorful, spherical markers placed on power lines for the safety of low flying aircraft and to protect the electrical infrastructure. They allow the electrical wires to be noticeable (especially during times of low visibility or inclement weather) thanks to their bold colors.

Why do telephone wires sag in winter?

Telephone wires are made up of Copper. As we know that metals expand in heat and shrink in cold temperatures. So, during summer the rising temperature makes the copper in the wire expand - so it gets sagged. but, during winter, the scenario is completely reverse and the copper contracts and so the wire becomes tight.

Why is it advisable to allow telephone lines to sag while fixing them between poles in summer?

Originally Answered: Why is it advisable to allow telephone lines to sag when stringing them between poles in summer? Because most materials, includig the metal that telephone lines are made of, contract when they get colder. So if the lines are tight in summer they will probably break when winter comes.

Why the telephone wire taut in winter and slacked in summer?

In summers due to excessive heat, the temperature of the wire increases and wires expand. Also, Young's modulus decreases and hence wires slack down. In winter, the temperature of wires decrease and wires contract. Hence, wires get tightened.

Why do telephone wires and power cables hang lower on hot days and become tighter at night?

The lines are often heavily loaded because of increased power consumption, and the conductors, which are generally made of copper or aluminum, expand when heated. That expansion increases the slack between transmission line structures, causing them to sag.

Why are cables left loose?

Cables are good conductor of heat . In winter , the cable contract due to lowering in atmospheric temperature . So, the cable are often left loose so that they can't break in cold days due to tension in cables.

Do power lines sag more in summer than winter?

A line sags more in hot weather and less in cold weather. The reason for this is because conductors expand in hot weather; in other words the length of the conductor increases as the temperature increases.

Why do electric power lines sag during summer days?

The lines are often heavily loaded because of increased power consumption, and the conductors – which are generally made of copper or aluminum – expand when heated. That expansion increases the slack between transmission line structures, causing the lines to sag.

What happens to power lines in the winter?

In winter, ice and wind, even wind alone, can be just as dangerous and destructive to power lines, leading to a disruption in service. Each drop of freezing rain adds weight to power lines and their structures. It also adds more pressure and strain.

How are telephone lines connected?

Telephones: Wires and Cables

The telephone network starts in your house. A pair of copper wires runs from a box at the road to a box (often called an entrance bridge) at your house. From there, the pair of wires is connected to each phone jack in your house (usually using red and green wires).

Is it safe to cut old telephone wires?

A: Cable and phone wires don't carry current, so it's safe to remove them. However, it's critical not to cut into a power line, as you know.