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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

Put-Up

The packaging of wire and cable or the quantity of packaged product itself that is ready to be stored or shipped out.

PVC

See Polyvinyl Chloride.

PVDF Compound

Designation for polyvinylidene fluoride resin with a melting point of 171°C and a high temperature rating. It has good chemical resistance against the attack or penetration of most corrosive chemicals and organic solvents including inorganic acids, oxidants, alkalis, halogens and hydrocarbons. It is a very hard material with high tensile strength, which results in insulations with excellent cut-through resistance and good abrasion resistance.

PW

Designation for moisture-proof, reinforced, portable cord with two or more rubber-insulated conductors with individual cotton braid. Moisture-resistant cotton-braid finish over rubber jacket, 300V-600V.

PWP

See PW.

Pyroconductivity

Electric conductivity that develops with changing temperature, and notably upon fusion, in solids that are practically non-conductive at atmospheric temperatures.

Pyrometer

An instrument that uses the radiation emitted by a hot body as a basis for measuring temperatures.

P–P

Designation for Peak to Peak.

Q Factor

Ratio of coil reactance to effective coil resistance that is the measure of electrical loss in a coil.

QA

Designation for Quality Assurance.

QPL

Designation for Qualified Products List, issued by the U.S. government.

QR Compounds

Silicone elastomers that are various polymers in which the main polymer chain consists of alternating silicone and oxygen atoms in combination with either methyl or phenyl. Some vinyl groups are introduced to facilitate peroxide crosslinking. Silicones have outstanding properties, especially resistance to high temperatures.

Quad

An assembly of four separately insulated conductors. May be either a multiple-twin quad in which two twisted pairs are twisted together, or a star quad in which four wires are twisted about a common axis. A cable containing a number of units each consisting of four twisted pairs about a common axis is known as a quad-pair cable. Also, a series-parallel combination of transistors with increased reliability because failure of one transistor will not disable the entire circuit.

Quadder

Three-bay machine that can twist four wires together. They can be cable braided and shielded wires with varying lay lengths.

Quadruplex Cable

A cable composed of four conductors twisted together, usually three insulated with one bare neutral.

Quadruplexed

Having four conductors twisted together.

Quality

1) The totality of features and characteristics of a product or service that relate to its ability to satisfy a given need (fitness-for-use concept of quality). 2) Degree of excellence of a product or service (comparative concept). Often determined subjectively by comparison against an ideal standard or against similar products or services available from other sources. 3) A quantitative evaluation of the features and characteristics of a product or service (quantitative concept).

Quality Assurance

All the planned and systematic actions to provide confidence that a product, service, structure, system or component will perform satisfactorily.

Quality Characteristic

Any dimension, mechanical property, physical property, functional characteristic or appearance characteristic that can be used as a basis for measuring the quality of a unit of product or service.

Quality Control

The segment of any operation concerned with the maintenance of high uniform standards on all materials manufactured.
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