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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


Designation for Thermoplastic PVC, building wire, 60°C (140°F).

T Wire

Designation for a type of non-metallic sheathed building wire used in houses.


For AT&T, a hierarchy of digital systems designed to carry speech and other signals in digital form, designated T1, T2 and T4. A T1 carrier has 24 PCM voice channels.

T/d Cu

Designation for tungsten copper (electric wire).


A common carrier circuit leased (private line facility) which is the standard method of interconnecting digital communications systems in North America. The line operates at a rate of 1.544M bps. With DS-1 signaling, the facility provides twenty-four 64 Kbp.


Designation for switchboard wire, insulated wire, thermoplastic and felted asbestos, 90°C (194°F).


Designation for flexible nickel or nickel-clad copper, PTTE tape, felted asbestos, asbestos braid, 200°C (392°F).


An instrument for measuring the speed of a shaft or machine in revolutions per minute.

Tainton Process

See Bethanizing Process.

Take-Off Stand

Used where it is required to unwind wire from a reel. A key for this is that the equipment be able to apply the re­quisite tensions.


1) The process of accumulating wire or cable onto a reel, bobbin or some other type of pack. 2) The device for pull­ing wire or cable through a piece of equipment or machine and winding the finished product at the collection point onto a spool that is controlled for sufficient torque. See Spooler.

Tallow Soap

A paste lubricant used for rod drawing applications.

Talurit Swaging Process

A method of forming eyes in wire ropes by threading the rope through an aluminum ferrule, and then placing both the rope and the ferrule in a swager that is fitted with the appropriate Talurit swaging dies. The correct hydraulic pressure is then applied and the ferrule and rope are formed into a loop eye.

Tan Delta

See Dissipation Factor.

Tandem Drawing Machine

See Wiredrawing Machine, Tandem.

Tandem Extrusion

Extruding two materials whereby the second is applied over the first. The two extruders are relatively close (less than a meter) in the process.

Tandem Marker

See Marking, Tandem.

Tandem Mill

A rolling mill that consists of two or more stands arranged in a direct line. The metal being processed travels from one stand to the next.

Tangential Extrusion

Extruding technique where a die is mounted on an abutment of a fixed shoe machine. See Conform.™

Tangle, Process

When wire wraps around itself as it is being de-reeled or leaving the payoff stand for process.

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