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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

Tension Meter

A meter used to measure and test the tension in all types of wire, yarn, tape and film during production processing and winding.

Tension Ratio

Used to evaluate the tension of the product before and after a capstan load to determine the direction and amount of slippage.

Tension Regulator

Device used to control tension during the manufacture or handling of wire or cable. It is used primarily to control tension of cable being wound on to a reel or between sheaves in a coordinated drive system.

Tension Set

The condition when a plastic material shows permanent deformation caused by a stress, after the stress is removed. This term covers applications from pre-stressed steel strand to overhead transmission cables, etc.

Tension Spring

A helical spring designed to increase in length on application of load.

Tension, Final Unloaded Conductor

The tension after the conductor has been stretched for an appreciable time by loads simulating ice and wind.

Tension, Initial Conductor

The tension prior to any external load.

Tension, Working

The tension that should be used for a portable cable on a power reel. It should not exceed 10 percent of the cable breaking strength.

Tensionometer

Device used to measure surface tensions of liquids for their wetting capability.

Terminal

1) A metal wire termination point that is designed to handle one or more conductors, and to be attached to a board bus or block with mechanical fasteners or clips, or bare wire ends. Basic types include ring tongue, spade, flag, hook, blade, quick connect, offset and flanged. Special types include taper pin, taper tab and others, either insulated or non-insulated. 2) Facility at which information is gathered and disseminated within a communications network.

Terminating Cable

A multi-paired cable used in the telephone (communications) exchange for connecting the outside cable to the main distributing frame. Sometimes referred to as Tip Cable. It is a special cable primarily intended and designed for terminating area cables on protective frames in central offices where sealed chamber terminals are not required. The cable insulation in these cases is usually plastic, pulp and paper ribbon insulated.

Termination

1) The connection of a cable. 2) The preparation of a shielded cable for connection. 3) A location where wires are connected to a variety of terminals.

Ternary Alloy

An alloy that contains three principal elements.

Terrazzo Strip

A formed product with special flatness and straightness requirements made from strip or extruded sections for use as dividing strips in terrazzo floors.

Tertiary Winding

A winding added to a transformer in addition to the conventional primary and secondary windings, such as for suppressing third harmonics or connecting to a power factor-correcting device.

Test Lead

A flexible insulated lead wire that usually has a test prod, clamp or other connectors on one or each end. It is ordinarily used for making tests, connecting instruments to a circuit temporarily, or making temporary electrical connections.

Test Report

The term mainly used for the permanent records on the tests made by a wire manufacturer that were performed on a batch of wire to verify specifications were met.

Test, Corona

Finding the corona extinction and inception voltage levels. Low levels indicate impurities in insulation, or voids within the insulation, or voids between insulation and shield, or broken shields. For bare overhead conductors, a corona (see entry) is the result of a surface irregularity.

Test, Dimensional Stability

A test where a specified length of cable (one ft) is heated to measure insulation shrink-back from the conductor.

Test, Proof

See Proof Test.
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