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GLOSSARY

TERMINAL

A device for joining electrical circuits together.

TEW

Thermoplastic Equipment Wire. Canadian Standards Association type appliance wires. Solid or

stranded single conductor, plastic insulated, 105°C, 600V.

THERMOPLASTIC

A material that can be softened repeatedly by heating and hardened by cooling through a

temperature range characteristic of the plastic, and that in the softened state can be shaped by

molding or extrusion.

THERMOSET

A material that has been vulcanized by heat or by other means and is substantially infusible and

insoluble.

THERMOSETTING INSULATION A polymer material that irreversibly cures. The cure may be done through heat (generally above

200 °C (392 °F)), through a chemical reaction, or irradiation such as electron beam processing.

Thermoset materials are usually liquid or malleable prior to curing and designed to be molded into

their final form, or used as adhesives.

THHN

600 volt 90°C nylon jacketed building wire.

TIN-PLATED

The resulting product of a process of thinly coating sheets of wrought iron or steel with tin. Often

to prevent rust and corrosion.

TINNED COPPER

Tin coating added to copper to aid in soldering and inhibit corrosion.

TPE

Thermoplastic Elastomer.

TRAVERSE

The length of the barrel of a reel or spool from flange to flange.

TWP

Thin-wall PVC Wire.

TXL

Thin-wall cross-link polyethylene insulated wire. Used in automotive applications where small

diameter and minimal weight is desirable.

UL

Underwriters Laboratory. A non-profit independent organization, which operates a listing service

for electrical and electronic materials and equipment. (Canadian counterpart is CSA).

UL 1015

Single conductor with extruded insulation.

UL 1426

Electric cables for boats.

UNILAY

A conductor with more than one layer of helically laid wires with the direction of lay and length of

lay the same for all layers.

UNIVERSAL

Adapted or adjustable to many sizes or mechanical uses. Can be used in both positive and

negative applications.

UV RESISTANT

Being resistant to ultra violet (UV) light or sunlight. UV light, or sunlight, will cause non-resistant

materials and surfaces to fade or discolor.

VINYL

Any of various compounds containing the vinyl radical, typically highly reactive, easily

polymerized, and used as basic materials for plastics.

VOLT

The International System unit of electric potential and electromotive force, equal to the difference

of electric potential between two points on a conducting wire carrying a constant current of one

ampere when the power dissipated between the points is one watt.

VOLTAGE

Electromotive force or potential difference, usually expressed in volts.

VOLTAGE DROP

A voltage loss occurring between any two points in a power circuit.

VULCANIZED

To improve the strength, resiliency, and freedom from stickiness and odor of (rubber, for example)

by combining with sulfur or other additives in the presence of heat and pressure.

VW-1

The flammability rating established by Underwriters Laboratories for wires and cables that pass a

specially designed vertical flame test, formerly designated FR-1, Similar to CSA designation FT1.

WIRE

A usually pliable metallic strand or rod made in many lengths and diameters, sometimes clad and

often electrically insulated, used chiefly for structural support or to conduct electricity.

XLPE

Cross-linked polyethylene.

ZINC-PLATED

The product of a electroplating, the practice of putting an object in a solution and using electricity

to coat it. Zinc plating is commonly used on steel to provide corrosion resistance.

GLOSSARY