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There are many myths, beliefs, and opinions in the industry on

why aluminum conductors should or should not be used in certain

applications. The use of aluminum conductors causes questions and

concerns for many electricians, engineers, inspectors, and owners.

Aluminum has the features of low cost and low weight. Current

electrical grade aluminum (Al) conductors are actually an aluminum

alloy. Aluminum conductors can be round or bar shaped. Both of these

shapes are used in a large majority of transmission and distribution

circuits as well as industrial plants. The primary reasons for using

aluminum conductors are its lower cost and low weight to conductivity

ratio.

    

Modern aluminum alloys have been improved. Round conductor prior to

the mid 1970s was made of aluminum alloy 1350, which was essentially

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conductor/]All Aluminum Alloy Conductor[/url]. It had undesirable

mechanical characteristics such as a large coefficient of thermal

expansion and a susceptibility to bending and creep failure. Many

fires were reported with alloy 1350. The current alloy utilized for

round conductor inside buildings is the 8000 series, which became

commercially available in the mid 1970s. To improve its mechanical

characteristics over pure aluminum, additional elements were added to

the 8000 series. In addition, it undergoes an annealing process.

Aluminum is a proven, cost effective means to conduct electricity.

The issues of the early aluminum alloy 1350 have been addressed in

the 8000 series alloys, the proven connection methods and the

connectors in use today. Aluminum and aluminum alloys should be

considered as acceptable materials for

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conductors/]All Aluminum Conductors[/url] in power circuits provided

the correct series of material is used and appropriate design,

installation, and connection techniques are utilized.

Aluminum Conductors are most commonly used for making cables. Cable,

in electrical and electronic systems, a conductor or group of

conductors for transmitting electric power or telecommunication

signals from one place to another. Electric communication cables

transmit voice messages, computer data, and visual images via

electrical signals to telephones, wired radios, computers,

teleprinters, facsimile machines, and televisions. There is no clear

distinction between an electric wire and an electric cable. Usually

the former refers to a single, solid metallic conductor, with or

without insulation, while the latter refers to a stranded conductor

or to an assembly of insulated conductors. With fibre-optic cables,

made of flexible fibres of glass and plastic, electrical signals are

converted to light pulses for the transmission of audio, video, and

computer data.

The most common type of electric power cable is that which is

suspended overhead between poles or steel towers. These aerial cables

consist of a number of wires, usually of copper or aluminum, twisted

(stranded) together in concentric layers. Copper or aluminum is

chosen for high electrical conductivity, while stranding gives the

cable flexibility. Because aerial cables are frequently subjected to

severe environmental stresses, alloys of copper or aluminum are

sometimes used to increase the mechanical strength of the cable,

although at some detriment to its electrical conductivity. A more

common design is to include in the stranded cable assembly a number

of high-strength, noncorrosive steel wires. Many aerial cables,

especially those operating at high voltages, are bare (uninsulated).

Cables operating at lower voltages frequently have coverings of

asphalt-saturated cotton braid, polyethylene, or other dielectric

(nonconducting) material. These coverings offer some protection

against short-circuiting and accidental electric shock.

Except that, there are also many types of cables like

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ABC Cable[/url], [url=http://www.lyyrcable.com/aerial-bundled-

cables/mv-abc-cable/]MV ABC Cable[/url],

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cables/]Power Cables[/url], [url=http://www.lyyrcable.com/power-

cables/lv-single-core-power-cable/]LV Single Core Power Cable[/url],

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