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The Book of Terms

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The Book of TermsThe WJI Book of Wire & Cable Terms: an interactive experience of learning and sharing
This book, written by industry volunteers and containing more than 5,000 entries, is an asset for newcomers to wire and cable.

At the same time, it also represents an opportunity for industry veterans to give back by either updating or adding to the more than 5,000 entries. This is an honor system process. Entries/updates must be non-commercial, and any deemed not to be so will be removed. Share your expertise as part of this legacy project to help those who will follow. Purchase a printed copy here.

   

 

0-9   A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Feeder

The circuit conductors between the service equipment and the final branch circuit over-current device.

Feeder Cable

In telecommunication or CATV systems, the transmission cable from the head end (signal pickup) to the trunk amplifier. Also called a Trunk Cable.

Feedthrough

1) A conductor that connects on opposite sides of a PCB. Also called interfacial connection. 2) A connector or terminal block, usually having double-ended terminals which permit simple distribution and bussing of electrical circuits.

Fencing Wire

This end-use application is usually made from a mild steel wire this is fully annealed and in general galvanized after annealing, or plastic-coated.

FEP

Designation for Fluorinated Ethylene Propylene, a melt-extrudable fluorocarbon resin that is a 200°C rated thermoplastic copolymer insulating and jacketing material.

FEPB

Designation for FEP insulated wire but with glass or asbestos braid, 90°C dry locations, 200°C dry locations special applications.

FEPCC

Designation for high temperature control cable.

Ferranti Effect

When the voltage is greater than the source voltage in an AC cable or transmission line. The name stems from Sebastian de Ferranti, whose attempt to transmit electricity in 1890 initially worked, but soon resulted in fires that destroyed the transformers. The cause was believed to be higher voltage at the receiving end, caused by resonance.

Ferric Oxide

This is one of three oxides of iron which form on rod or wire as scale. Also known as hematite, it forms the outer layer and has a hardness of about 1030 dph. See Ferrosic Oxide and Ferrous Oxide.

Ferrite

A solid solution in which alpha iron is the solvent, and which is characterized by a body-centered cubic crystal structure. See also Austenite, Alpha Iron.

Ferritic Steel

A steel in which, at normal temperatures, the ferritic phase predomi­nates. The term has also been extended to cover steels containing a high percentage of alloying elements such as chromium, silicon, etc., which form little or no austenite when heated.

Ferroalloy

An iron-bearing product, not within the range of those called steels, which contains a considerable amount of one or more alloying elements, such as manganese, silicon, phosphorus, vanadium, chromium. Some of the more common ones are ferrochromium, ferromanganese, ferrophosphorus, ferrosilicon, ferrovanadium. The chief use of these alloys is for making additions of their respective alloying elements to molten steel.

Ferrochrome

An additive that contains about 70 percent chromium. It is used when it is desired to add chromium to steel.

Ferromanganese

Produced in electric reduction furnaces, containing, besides iron, 78 to 82 percent of manganese and limited amounts of silicon, phosphorus, sulfur and carbon. It is used as a deoxidizer and for the introduction of manganese into steel.

Ferrophosphorus

A finishing material (see “Finishing”) that contains about 18 percent phosphorus. It is used when it is necessary to add phosphorus to steel.

Ferrosic Oxide

One of three oxides of iron, which form on rod or wire as scale, ferrosic oxide forms between the ferrous oxide and the outer layer of ferric oxide. Also known as magnetite, it has a hardness of up to about 500 dph and forms the greater part of the outer scale. See Ferric Oxide and Ferrous Oxide.

Ferrosilicon

A product of the blast furnace, it contains 8 to 15 percent silicon. It is used as a deoxidizer and for adding silicon to steel.

Ferrosilicon Process

In magnesium metallurgy, the process of reducing magnesium oxide with the silicon contained in ferrosilicon.

Ferrous

Composed of and/or containing iron. The word is derived from the Latin, ferrum.

Ferrous Metallurgy

The section of metallurgy which embraces the science and knowledge applying to iron and steel products, their preparation and adaptation to their numerous uses.
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