0
They shouldn't, usually it is the other way around. As with all wire, the temperature effects wire lengths. When wires become warm as in a hot summer day the wires expand and droop and likewise when they become cold as in winter they contract and tighten up. The wires have to be installed to take this condition into consideration. There is a specific engineered sag allowed for each type of conductor from pole fix point to pole fix point.
Wiki User
∙ 9y ago
Wiki User
∙ 14y agoThe reason that telephone wires sag on a hot day is because the heat makes the telephone wires expand and on a cold day they contract. hope that helps :)
Wiki User
∙ 9y agoI believe you have that backwards. Power lines shrink (contract) in cold weather and expand in hot weather. Metal expands when it is heated.
Wiki User
∙ 6y agoMetals expand when warmed.
Add your answer:
Earn +20 pts
What did Walter Lincoln invent?
Walter Lincoln invented better telephone wires, which made global telephone calls possible.
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.
How many wires are in rs232?
The full original standard defined by the telephone company for connecting 300 baud full-duplex, 1200 baud half-duplex, asynchronous, synchronous, etc. modems to data terminals defines 25 wires. However many of these wires serve very specialized purposes or have become obsolete with improved modems.Later the standard was modified to permit a subset of the 9 wires most frequently used by asynchronous modems: chassis ground, signal ground, transmit data, receive data, request to send, clear to send, data set ready, data terminal ready, and ring detected.Many applications can get away with using the bare minimum of 3 wires: signal ground, transmit data, and receive data.
What is wired communication system?
Wired communications is a broad term that is used to describe any type of communication process that relies on the direct use of cables and wiring to transmit audio and visual data. A classic example of wired communications is the traditional home telephone that is connected to the local telephone switch via wires that are ran from the home to the switch. While wireless communication solutions have become more common in recent years, the use of wired services remains common and is not likely to disappear in the near future
Do simple machines use wires?
some simple machines do need wires and some dont
Why telephone wires need to be slack in the summer?
Telephone and electric wires stretch (expand) when the weather is hotter. Conversely, in the winter they shrink. Without some slack, they could become too tight and break, or pull loose from their anchors.
Why does the electric wire become loose in summers?
The metal wires expand in the heat - making them sag.
When will a telephone wire be longer summer or winter?
When metals (like the copper in the telephone wires) gets exposed to heat, they expand (thermal expansion) and when the get cooled they shrink. This directly implies that cables are longer in summer when it is hot. So telephone wires are longer in the summer.
How telephone wires connected?
I'll take that as "How are telephone wires connected?" but it's still unclear what you want to know. Telephone wires are connected just as any other wires are connected. By screw connections, by soldering, by crimping.
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.
Why do wires hang loose on poles in summer?
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.
Why is copper used for telephone wires?
Copper is used for telephone wires because it is the second best conductor of electricity after silver (which is a little pricey).
What do the telephone wire look like on a hot day?
what happens to telephone wires on hot days
Where are the telephone wires in big nate?
it is nere the pole
What do squirrels balance on telephone wires like?
squirrel
Is it dangerous to have loose outlets?
It can cause a danger if the outlet is yanked or has the metal of the wires exposed. It is best if the outlets become secured properly as soon as possible.
When outside what do you do during earthquake?
make sure your not near any electrical wires or telephone wires
