Aluminum actually is used to carry electricity, but only in applications where the problems it presents can be overcome and reliability assured. Aluminum has some issues with the "joints" or connections made to it. It has a high rate of thermal expansion, so in applications where temperatures fluxuate widely and/or frequently, it may present problems. It is a pretty good conductor of electricity, and it is attractive because it is cheaper than copper, but issues with thermal expansion and also with oxidation at connections have lead to arcs and the disruption of service - and to fires.
Aluminum is cheaper and lighter. The downside is aluminum is not as strong as copper. In overhead power lines, aluminum is often used with an internal steel core which provides the strength (aluminum conductor, steel reinforced or ACSR).
Nowadays aluminum is replacing copper for use in electrical cable for two reasons:
1. Aluminium is cheaper than copper.
2. Aluminium is a good substitute for copper.
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It is not replacing copper in the smaller sizes that lesson was learned in the 70's. It is used in service entrance conductors for the reasons above. Even though the aluminum conductors has to be up sized for the same ampacity as copper it is still more economical in the larger sizes than copper.
Aluminium (or aluminum as it is known in America) is considerably less expensive than copper. Also, because aluminum is a different color than copper, it is sometimes useful to have a double stranded wire that has one copper and one aluminum strand, to enable you more easily to track the individual strands - my stereo cable has that design.
Copper is more usual for wires because it is the best conductor, except silver which is slightly better.
Aluminium can also be used. It does not conduct so well but it is a much lighter metal so it is popular for overhead power lines which use stranded cables with aluminium strands on the outside and steel strands at the centre for strength; that is called ACSR.
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Above IS correct- but in addition, aluminum wiring for inside buildings has been tried. Aluminum exposed to air tarnishes to aluminum oxide, which is a poor conductor. When points where aluminum wires were connected to standard switches and outlets tarnished, they get very hot when current passes thru them. This resulted in several fires. and the withdrawal of aluminum wiring for routine indoor uuse.
For 2 reasons; alumimum is cheaper (per pound) than copper, so it's more price-competive on those multi-mile distances, plus it's lighter, which lets those expensive pylons be placed farther apart.
Aluminum is used instead of iron because it does not rust like iron and is very much lighter in weight.
Because copper is a very good conductor of energy
Though gold is better it is much more expensive
It's lighter and cheaper.
it is cheaper
Electricity is brought into our homes along cables of conductive copper wires insulated against shortening by an insulating covering of plastic.
High electrical conductivity: Aluminum has very high electrical conductivity. So it is good for making electrical cables.High ductility: Its ductility is very high which makes it perfect for drawing large aluminum cables.Light weight: Aluminum weighs about one third of copper, nickel, brass, and steel. Its specific gravity is 2.7. So the aluminum cables are very light weight, hence suitable for long distance cabling. They are also useful in overhead cabling.High resistance to corrosion: Aluminum is resistant to corrosion which makes it a good choice for manufacturing underwater cables.High strength: The high strength of aluminum prevent it from creeping even under high load. However, on overhead transmission lines it is sometimes strengthened with steel.Economical: Aluminum is one of the most economical elements and hence the aluminum cables are cheaper than copper, their nearest competitor.Physical properties: Aluminum is silvery white metal and highly reflective to heat and light. It is easily machinable and can have various surface finishes. It is easily recyclable.Non magnetic: Aluminum is non-magnetic in nature which is an important property for making armors and raceways.usually metals are good conductors of heat and electricity.aluminium,being a metal,can be used for making electric wires.
Metals and particularly copper, are good conductors of electricity a prerequisite for an electric cable. In addition, they are ductile enabling them to be drawn out easily into wire/cable.
Aluminum is suitable for making electrical wire because it is a good conductor of electricity, lightweight, and cost-effective. It has a high strength-to-weight ratio and can carry electric current efficiently over long distances. Additionally, aluminum is less prone to corrosion compared to other metals, making it a durable choice for electrical wiring applications.
your electricity supply at home reaches you through the Nation Grid.This is a network of cables connecting power stations to homes and other buildings. The network also contains trasformers. Step-up transformers are used at power stations and Step-down transformers are used at sub-stations rear homes.
it conducts the electricity in the cables
Actually, aluminum mylar tape shielded cables are better than copper braid shielded cables for instrumentation cables.
Al is lighter than Cu.
They're connected by cables. The wind spins the turbine - generating electricity. The electricity is fed into the national grid by cables.
Aluminum is a metal that is a good conductor of electricity. It has an excellent ratio of conductivity/weight. Also has an excellent ratio of conductivity/price.
It is not practically possible.
By overhead cables, supported on masts, at very high voltage, to reduce the effects of resistance in the wires.
The reason for this is that aluminum has much higher electric conductivity than steel, but otherwise its mechanical properties are much worse. Steel core actually carries a cable.
You want ladders that will not conduct electricity. Aluminum ladders are not a good idea. Fiberglass ladders are best for working around power cables.
Through cables.
someone smart
why?