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The Book of Terms

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.

   

 

All   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

Fatty Oils

1) An ingredient used in an oil-based lubricant/coolant, particularly on aluminum wiredrawing and rolling applications. Fatty oils enhance the extreme pressure characteristic of the oil (usually mineral oil) and increase lubricity. 2) An ingredient “solublized” or emulsified in a water-based coolant to provide characteristics needed to perform drawing or rolling functions.

Fault

An electrical short circuit or leakage path to ground.

Fault Current

The current that flows as a result of a short-circuit condition.

Fault, Arcing

A fault having a high impedance causing arcing.

Fault, Bolted

A fault of very low impedance.

Fault, Ground

A breakdown or damage in an electrical circuit that results in part of the circuit contacting ground (neutral) where it should be isolated “above” ground.

FCC

Designation for flexible control cable. Also, face-centered-cubic crystal structure.

Feed Hopper

A funnel-shaped container mounted directly over the barrel at the feed throat of an extruder. It suppliers material to the extruder and holds a reserve of material.

Feed Section

The first stage of a screw of a cable extruder that picks up the material at the feed opening (throat) to the second, metering, section.

Feed Throat

A hole through the barrel for the introduction of the feed material.

Feed-through Insulators

Fabricated from dielectric materials, feed-through insulators are used to carry a metal conductor through the chassis while preventing the “hot” lead from shorting to the ground chassis.

Feedback

1) Energy that is extracted from a high-level point in a circuit and applied to a lower level. 2) The response from a controlled device that a control signal was received and the appropriate function is complete. 3) The returning of a fraction of the output to the input.

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.
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