All | # 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
There are currently 571 names in this directory
A flexible, insulated lead wire used for making tests, connecting instruments to a circuit temporarily or for making temporary electrical connections.
The permanent records made by a wire manufacturer of the tests performed on a batch of wire to a specification.

Alternating Current (a.c.). An electric current which periodically reverses direction, in contrast to direct current (DC) which flows only in one direction. The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.

Abrasion Resistance
A measure of ability of a wire, wire covering or material to resist surface wear or damage by mechanical means.

Accelerated Aging
A test that attempts to duplicate long-time environmental aging in comparatively short time sans.

A chemical additive used to initiate the chemical reaction in a specific chemical mixture.

Cables bonded by adding an adhesive coating to the surface of the cable components, then joining and curing the adhesive to form a cable. See Bonded Cables.

The measure of the ease with which an alternative current flows in a circuit. The reciprocal of impedance.

The change in properties of a material with time under specific conditions.

Acronym for Aluminum Mylar. A laminated aluminum and polyester tape used for shielding wires.

A metal formed by combining two or more different metals to obtain desirable properties.

Alternating Current (AC)
Electric current that continually reverses its direction. It is expressed in cycles per second (Hertz or HZ).

Ambient Temperature
The temperature of a medium (gas or liquid) surrounding an object.

American Wire Gauge (AWG)
The standard system used for designating wire diameter. The lower the AWG number, the larger the diameter. Also called the Brown and Sharpe (B&S) Wire Gauge.

The maximum current an insulated wire or cable can safely carry without exceeding either the insulation or jacket material limitations.

A unit of current; one ampere is the current flowing through one ohm of resistance at one volt potential.

Ampere’s Law
The magnetic intensity at any point near a current-carrying conductor can be computed on the assumption that each infinitesimal length of the conductor produces at the point of an infinitesimal magnetic density. The resulting magnetic intensity at the point is the vector sum of the contributions of all the elements of the conductor.

Transmission data densities by continuously variable quantities.

The process of controlled heating and cooling of a metal. In a wire and cable products, copper and aluminum are annealed to increase flexibility while maintaining adequate strength.

American National standards Institute.

A substance which prevents or slows down oxidation of material exposed to air.

A substance which prevents or slows down material degradation due to ozone reaction.

Appliance Wire and Cable
A classification covering insulated wire and cable for internal wiring of appliances and equipment.

Arc Resistance
The time required for an arc to establish a conductive path in a material.

The outer-most layer of a cable applied for mechanical protection usually consisting of layer(s) of metallic tape, braid, or served wires.

American Standards Association; former name of ANSI.

American Society of Mechanical Engineers.

United Kingdom approval agency.

The American Society for Testing and Materials, a non-profit industry-wide organization which publishes standards, methods of test, recommended practices, definitions and other related material.

Power loss in an electrical system. In cables, generally expressed in db per unit length, usually 100 ft.

Audio Frequency
The range of frequencies audible to the human ear. Usually 20-20,000 Hz.

American Wire Gauge. The standard system used for designating wire diameter. Also referred to as the Brown and Sharpe (B&S) wire gauge.

Underwriters Laboratories designation for Appliance Wiring Material.

B & S Gauge
Brown and Sharpe Gauge, a wire diameter standard which ultimately led to the American Wire Gauge standard.

Balanced Line
A cable having two conductors which carry voltages opposite in polarity but equal in magnitude with respect to ground.

Bare Conductor
A conductor having no covering, coating or cladding on the copper.

Method of coiling into a fiber drum for shipment.

Bend Radius
Radius of curvature that a cable can bend before the risk of breakage or increased attenuation occurs. To determine bend radius a good rule of thumb is not to exceed ten times the cable diameter.

Made non-inductive by winding together (as one wire) two wires carrying current in opposite directions.

Bimetallic Wire
A wire formed of two different metals joined together (not alloyed). It can include wire with a steel core clad wire, plated or coated wire.

A material used for holding assembled cable components in place awaiting subsequent manufacturing operations.

Metal spools used for taking up drawn wire and subsequently used for payout packages in cabling and stranding equipment.

The attachment at an interface between an adhesive and adherent or between materials attached by adhesive.

Bond Strength
Amount of adhesion between bonded surfaces, e.g. in cemented ribbon cable.

Bondable Wire
An insulated wire treated to facilitate adherence to materials such as potting compounds. Also, magnet wires used in making coils when bonding the turns together is desired.

Bonded Cable
Cable consisting of pre-insulated conductors or multiconductor components laid in parallel and bonded into a flat cable. See Adhesive-Bonded.

Bonded Construction

A fibrous or metallic group of filaments interwoven in a cylindrical shape to form a covering over one or more wires.

Braid Angle
The angle between the axis of the cable and axis of the braid.

Braid Carrier
A spool or bobbin on a braid which holds one group of strands or filaments consisting of a specific number of ends. The carrier revolves during braiding operations.

Braid Ends
The number of strands used to make up one carrier. The strands are wound side by side on the carrier bobbin and lie parallel in the finished braid.

Braiding Machine
Machine used to apply braids to wire and cable and to produce braided sleeving and braids for tying or lacing purposes. Braiding machines are identified by the number of carriers.

Breakdown (Puncture)
A disruptive discharge through the insulation.

Breakdown Voltage
The voltage at which the insulation between two conductors will break down or arc over.

Bunch Stranding
A group of like wires twisted together without regard to geometric pattern.

A machine that twists wires together in random arrangement.

Butt Wrap
Tape wrapped around an object or conductor edge-to-edge.

Centigrade or Celsius

Canadian Standards Association; the Canadian counterpart of Underwriters Laboratories.

A stranded conductor with or without insulation and other coverings (single-conductor cable) or a combination of conductors (multiple-conductor cable). In fiber optics, a jacketed fiber or jacketed bundle in a form which can be terminated.

Cable Core
The portion of an insulated cable lying under a protective covering.

Cable Core Binder
A wrapping of tapes or cords around the conductors of a multiple conductor cable used to hold them together.

Cable Filler
The material used in multiple conductor cables to occupy the interslices formed by the assembly of the insulated conductors, thus forming a cable core.

Cable Sheath
The protective covering applied to cables.

Cable Tray
A rigid structural system used to support cables and raceways. Types of cable trays include ladder, ventilated trough, ventilated channel and solid bottom.

Twisting together two or more insulated conductors by machine to form a cable. In fiber optics, a method by which a group or bundle of fibers is mechanically assembled.

Cabling Factor
Used in the formula for calculating the diameter of an unshielded, unjacketed cable. D=Kd, where D is the cable diameter, K is the factor and d is the diameter of one insulated conductor.

The process of setting a measurement instrument by use of standards.

The ability of a dielectric material between conductors to store energy when a difference of potential exists between the conductors. Cable capacitance is usually measured in picofarads (pF) per unit length.

Capacitance, Direct
The capacitance measured from one conductor to another conductor through a single insulating layer.

Capacitance, Mutual
The capacitance between two conductors (typically of a pair) with all other conductors, including shield and short circuited to ground.

The woven element of a braid consisting of one or more ends (strands) which creates the interlaced effect. Also, a spindle, spool, tube or bobbin (on a braiding machine) containing yarn or wire, employed as a braid.

Rating of a cable established by TIA/EIA to indicate the level of electrical performance.

Negative pole of an electric source.

Canadian Electrical Code; Canada’s version of the US National Electrical Code (NEC)

European Standards Agency; International Commission on Rules for the Approval of Electrical Equipment.

Certificate of Compliance (C of C)
A written statement, normally generated by a Quality Control Department, which states that the product being shipped meets customer’s specifications.

Certified Test Report (CTR)
A report reflecting actual test data on the cable shipped. Tests are normally conducted by the Quality Control Department and show that the product being shipped meets the required test specifications.

Characteristic Impedance
The ratio of voltage to current at every point along a transmission line at the point the voltage is applied. The impedance which makes a transmission cable seem infinitely long, when connected across the cable’s output terminals

Control and Instrumentation Cable, same as ACIC except not armoured

Cigarette Wrap
Tape insulation wrapped longitudinally instead of spirally over a conductor

A complete path over which electrons can flow from the negative terminals of a voltage source through parts and wires to the positive terminals of the same voltage source.

Circuit Breaker
A device that can be used to manually open or close a circuit and to automatically open a circuit at a predetermined level of overcurrent without damage to itself.

Circuit Voltage
The root-mean-square (effective) difference of potential between any two conductors of the circuit.

Circular Mil Area (CMA)
The square of a conductor diameter in mils, of thousandths of an inch. Example a 30 AWG conductor has a diameter of 10 mils and a CMA of 100. Used to determine conductor sizes.

Method of applying a layer of metal over another metal whereby the junction of the two metals is continuously welded. In fiber optics, a sheathing intimately in contact with the core of a higher refractive index material which serves to provide optical insulation and protection to the reflection interface.

Circular-Mil Area

Coated Copper
A copper conductor which has been coated with a metallic substance. A tin coating is applied to protect copper from chemical attack by sulfur-based insulation compounds; nickel coating is sometimes used with conductors rated for extremely high temperatures.

Coaxial Cable
Cable consisting of two cylindrical conductors with a common axis, separated by a dielectric.

Coaxial Connector
A connector that has a coaxial construction and is used with coaxial cable.

Coil Effect
The inductive effect exhibited by a spiral-wrapped shield, especially above audio frequencies.

Cold Bend
A cold chamber test to determine effects of specified temperatures on cable which has been wrapped around a mandrell.

Cold Bend Test
Test to measure a cable's ability to withstand cold temperature.

Cold Flow
Permanent deformation of the insulation due to mechanical force of pressure (not due to heat softening).

Color Code
A color system for wire or circuit identification by use of solid colors, tracer braids, surface printing, etc.

Combination Unilay
A stranding configuration that uses two strand sizes to achieve a 3% reduction in the conductor diameter without compression.

Common Axis Cabling
In multiple cable constructions, a twisting of all conductors about a “common axis” to result in smaller diameter constructions. Tends to result in greater susceptance to electromagnetic and electrostatic interference.

Composite (Clad) Wire
A wire having a core of one metal with a fused outer shell of different metals.

Composite Cable
A cable consisting of two or more different types or sizes of wires.

Composite Conductor
Two or more strands of different metals assembled and operated in parallel.

An insulating or jacketing material made by mixing two or more ingredients.

A stranding configuration with concentric strands in which all layers or the outer layer only is passed through a die to reduce the conductor diameter by 3%.

Concentric Stranding
A group of uninsulated wires twisted around a center core with subsequent layers spirally wrapped around the core, alternating lay directions, to form a single conductor.

In a wire or cable, the measurement of the location of the center of the conductor with respect to the geometric center of the insulation. Expressed in percent.

The ability of a conductor to carry electric current; reciprocal of resistance. Measured in mhos (ohm backwards).

the capability of material to carry electrical current, expressed as a percentage of copper conductivity with copper being 100%.

a substance, usually metal, used to transfer electrical energy from point to point.

A tube in which insulated wire and cables are run.

A device used to physically and electrically connect two or more conductors.

An alloy used in making thermocouples wires. An alloy of copper, nickel manganese and iron.

The part of a connector that carries the electrical current; two contacts are touched together or separated to control the flow.

Continuity Check
A test to determine whether electric current flows continuously throughout the length of a single wire or individual wires in a cable.

Continuous Load
An electrical load in which the maximum current is expected to continue for three hours or more.

Cable spiraling in an opposite direction than the preceding layer within a wire or cable.

Control Cable
A multiconductor cable made for operation in control of signal circuits.

Conventional Concentric
A stranding configuration in which individual wire are stranded concentrically with no reduction in overall diameter. Typically used for bare conductors.

A polymer formed from two or more types of monomer.

The most widely used electrical conductor in wires and cables. Some of the common types of electrical coppers and copper alloys are: Electrolytic tough pitch copper (ETPC) has a minimum copper content of 99.9%. Annealed conductivity averages 101% with a 100& minimum. Commonly used for wire and bus bars.

Copper-Clad Steel
Steel with coating of copper welded to it; same as Copperweld®.

A small, flexible insulated cable.

A luminous discharge due to ionization of the gas surrounding a conductor.

Corona Resistance
The time that the insulation will withstand a specified level of field intensified ionization that does not result in the immediate complete breakdown of the insulation.

Deterioration of material by chemical reaction of galvanic action.

The calculated percentage which defines the completeness with which a metal braid covers the underlying surface. The higher percentage of coverage, the greater the protection against external interference.

Textile braid or jacket of rubber, plastics or other materials applied over wire and cables to provide mechanical protection and identification.

The dimensional change with time of a material under load.

Creepage Path
The path across the surface of a dielectric between two conductors.

Act of compressing a connector barrel around a cable in order to make an electrical connection.

Inter-molecular bonds between long-chain thermoplastic polymers due to chemical or electron bombardment. The properties of the resulting thermo-setting material are usually improved.

Cross-Linked Polyethylene (XLPE)
A common thermoset insulation material for building wire and cable. Polyethylene made from petroleum and natural gas undergoes a cross-linking chemical reaction that causes compound molecules to bond, forming heavier molecules with the desired physical and chemical properties.

Cross-Sectional Area (csa)
The area of a conductor exposed by cutting the conductor perpendicularly to its length, expressed in circular-mils, thousands of circular-mil, square inches, or square millimeters.

Undesired electrical currents in conductors caused by electromagnetic or electrostatic coupling from other conductors or from external sources. Also, leakage of optical power from one optical conductor to another.

Canadian Standards Association, a non-profit independent organization which operates a listing service for electrical and electronic materials and equipment. The Canadian counterpart of the Underwriters Laboratories.

To change the physical properties of a material by chemical reaction.

Curing Cycle
The time, temperature and pressure required for curing.

The degree to which a wire tends to form a circle after removal from a spool. An indication of the ability of the wire to be wrapped around posts in long runs.

The rate of flow of electricity in a circuit, measured in amperes.

Current-Carrying Capacity
Maximum current an insulated conductor or cable can continuously carry without exceeding its temperature rating; also called ampacity.

Cut-Through Resistance
The ability of a material to withstand mechanical pressure usually a sharp edge or small radius without separation.

The complete sequence including reversal of the flow of alternating electric current.

Damp Location
An outdoor location that is partially protected from weather or an indoor location subject to a moderate degree of moisture, such as a basement.

dB Loss
The loss of a signal in a conductor expressed in decibels.

Direct Current.

Decibel (db)
A unit to express differences of power level. Used to express power gain in amplifiers or power loss in passive circuits or cables.

Dedicated Circuit
In a residence, a 120, 120/240, or 240 volt circuit that is installed to supply power to specific equipment indoors or outdoors, such as a large appliance or heating and air conditioning equipment.

Degree Rise
The amount of increase in temperature caused by the introduction of electricity into a unit.

Delay Line
A cable made to provide very low velocity of propagation with long electrical delay for transmitted signals.

A term borrowed from the textile industry for sizing yarns. Denier is defined as the weight in grams of 9,000 yards of yarn.

Derating Factor
A factor used to reduce the current-carrying capacity of a wire when used in environments other than that for which the value was established.

Design Voltage
Voltage for which a cable is designed.

Water or moisture absorbent material used to prevent moisture from damaging packaged equipment or other merchandise.

A device used in the drawing of a wire; the element through which the wire is drawn, to achieve a predetermined diameter. A mold used to form a plastic compound around a wire or cable.

An insulating medium which intervenes between two conductors and permits electrostatic attraction and repulsion to take place across it.

Dielectric Breakdown
The voltage required to cause an electrical failure or breakthrough of the insulation.

Dielectric Constant (K)
The ratio of the capacitance of a condenser with dielectric between the electrodes to the capacitance when air is between the electrodes. Also called Permittivity and Specific Inductive Capacity.

Dielectric Loss
The power dissipated in a dielectric as the result of the friction produced by molecular motion when an alternating electric field is applied.

Dielectric Strength
The voltage which an insulating material can withstand before breakdown occurs, usually expressed as a voltage gradient (such as volts per mil).

Dielectric Test
A test in which a voltage higher than the rated voltage is applied for a specified time to determine the adequacy of the insulation under normal conditions.

Transmission data representative by discrete characters.

Direct Burial Cable
A cable installed directly in the earth.

Direct Current (DC)
An electric current which flows in only one direction.

Direct Current Resistance (DCR)
The resistance offered by any circuit to the flow of direct current.

Direction of Lay
The lateral direction in which the strands of a conductor run over the top of the cable conductor as they recede from an observer looking along the axis of the conductor or cable. Also applies to twisted cable.

Discrete Wiring
Wire or wires having distinct identity and purpose.

Disruptive Discharge
A sudden, large increase in current through an insulation medium due to the complete failure of the medium under the electrostatic stress.

Double Shield
Two shields, on over the other, used to improve the shield effectiveness.

Drain Wires
A number of small gauge bare wires applied concentrically about the insulation shield of a high voltage cable for the purpose of a fault current return path.

Draw Feed Stock
Rod or wire that is subsequently drawn to a smaller size.

In the manufacture of wire, pulling the metal through a die or series of dies for reduction of diameter to a specified size.

Dry Location
A location not normally subject to dampness or wetness.

An underground or overhead tube for carrying electrical conductors.

Two-way data transmission on a four-wire transmission line.

Duplex Cable
A cable composed of two insulated single-conductor cables twisted together.

Duplex Parallel
Typically used in the thermocouple industry to denote two parallel conductors of dissimilar metals insulated in parallel without twists and jackets. Commonly applied to thermocouple grades and extension wires.

A measuring device used to denote the hardness of plastic. For most flexible plastics, the A or D scale is used.

Duty Rating
A rating that describes the ability of an electric device to carry a current load for a given frequency of use.

Symbol for voltage. Used to represent direct voltage or the effective (root-mean-square) value of an alternating voltage.

Electrical Conductor (electrical grade aluminum - now known as Alloy 1350).

Like concentricity, a measure of the center of a conductor’s location with respect to the circular cross-section of the insulation. Expressed as a percentage of displacement of one circle within the other.

Electronic Industries Association

A rubber or rubber-like material which will stretch repeatedly to 200 percent or more and return rapidly and with force to its approximate original shape.

Electrolytes process of tinning wire using pure tin.

A conductor through which a current enters or leaves a nonmetallic conductor.

Pertaining to the combined electric and magnetic fields associated with movements of electrons through conductors.

Electromagnetic Coupling
Energy transfer by means of a varying magnetic field.

Electromagnetic Field
A rapidly moving electric field and its associated moving magnetic field.

Electromagnetic Induction The
The production of a voltage in a coil due to a change in the number of magnetic lines of force (flux linkages) passing through the coil.

Electromotive Force (e.m.f.)
Pressure or voltage. The force which causes current to flow in a circuit.

The term used to indicate the application of a metallic coating on a surface by means of an electrolytic action.

Pertaining to static electricity or electricity at rest.

An increase in the length of a wire or cable caused by longitudinal tension.

Emergency Overload
Load which occurs when larger-than-normal currents are carried through a cable or wire over a certain period of time.

Electromagnetic interference.

Enameled Wire
A conductor with a baked-on enamel film insulation. In addition to magnet wire, enameled insulation is used on thermocouple-type wires and other wires.

The number of wires or threads on a braider carrier.

To apply rated voltage to a circuit or device in order to activate it.

Ethylene-Propylene-Diene Monomer rubber

Ethylene-Propylene Rubber.

More than one layer of helically-laid wires with the direction of lay reversed for successive layers, but with the length of lay the same for each layer.

Etched Wire
A process applied to fluoroplastic wire in which the wire is passed through a sodium bath to create a rough surface to allow epoxy resin to bond the fluoroplastic.

Ethylene tetrafluoroethylene. An alternating copolymer consisting of ethylene and tetrafluoroethylene segments. High impact resistance with useful mechanical properties up to 200°C.

Ethylene Copolymers (Non-Halogen)
An insulation material that combines attributes of polyethylene and polypropylene to provide a high level of flame resistance and low smoke production.

Electrolytic Tough Pitch C­opper. It has a minimum conductivity of 99.9%.

External Interference
The effects of electrical waves or fields which cause sounds other than the desired signal; static.

External Wiring
Electronic wiring which interconnects subsystems within the system.

Extruded Cable
Cable with conductors which are uniformly insulated and formed by applying a homogeneous insulated material in a continuous extrusion process.

Method of continuously forcing plastic, rubber or elastomer material through an orifice to apply insulation or jacketing over a conductor or cable core.

Federal Aeronautics Administration

Factor of Assurance
The ratio of the voltage of wire for cable insulation is tested to that which is used.

Unit of Capacitance. For wire and cable a lesser unit of picofarads is used. One picofarad is one thousand millionths of a Farad.

Fatigue Resistance
Resistance to metal crystallization which causes conductors or wires to break from flexing.

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

Fluorinated ethylene-propylene. A thermoplastic with excellent dielectric properties as well as chemical and head resistance.

A thread or thread-like structure. Also, a single discrete element used to transmit optical (light wave) information.

Fiber Optics
A lightwave or optical communications system in which electrical information is converted to light energy transmitted to another location through optical fibers and there is converted back into electrical information.

An area of influence around a magnet or electric charge.

(1) A material used in multi-conductor cables to occupy large interstices formed by the assembled conductors. (2) An inert substance added to a compound to improve properties or decrease cost.

A thin, plastic sheet.

Fine Stranded Wire
Stranded wire with component strands of 36 AWG or smaller.

Fixture Wire
A conductor used in lighting fixtures or similar equipment and used to connect a lighting fixture to branch circuit conductors. Common types include Type TF (thermoplastic insulated, solid or 7 strand conductor) and Type TFN (thermoplastic-insulated, nylon jacket, solid or 7-strand conductor).

Flame Resistance
Ability of the material to extinguish flame once the source of heat is removed.

Flame Retardant
A chemical added to insulation materials to make them less combustible, such as antimony trioxide (PVC) or alumina trihydrate or carbon black (XLPE). Also used to describe flame resistance.

The measure of the material’s ability to support combustion.

Flat Braid
A woven braid which is rolled flat at time of manufacture to a specific width depending upon construction. It is used as a ground strap.

Flat Cable
A cable with two smooth or corrugated, but essentially flat, surfaces.

Flex Life
The number of cycles that a cable can withstand before failure when bent around a specific radius.

the ease with which a cable may be bent.

That quality of a cable or cable component which allows for bending under the influence of outside force, as opposed to limpness which is bending due to the cable’s own weight.

High-temperature pastics with excellent electrical properties. New England Wire Technologies most frequently uses ETFE, FEP and PFA.

Foamed Dielectric
Using highly controlled extrusion processes, materials are foamed resulting in a significantly reduced dielectric constant (1.45 – 1.8) that approaches the nearly ideal properties of air without sacrificing structural integrity.

Foamed Plastics
Resins in flexible or rigid sponge formed with the cells closed or interconnected. Foamed insulations provide low dielectric contestants and weight savings.

A thin, continuous sheet of metal.

Feet Per Minute

A flammability rating established by Underwriters Laboratories for wire and cable that pass a specially-designed vertical flame test.

In ac systems, the rate at which the current changes direction, expressed in hertz (cycles per second).

Fungus Resistance
The ability of a conductor or cable assembly to resist physical or electrical degradation caused by fungus growth in wet or damp environments.

Fuse Wire
Wire made from an alloy that melts at a relatively low temperature.

Fused Coating
A metallic coating which has been melted and solidified, forming a metallurgical bond to the base material.

Fused Conductors
Individual strands of heavy tinned copper wire stranded together and then bonded together by induction heating.

A coating of some metal part (usually steel or iron) with zinc by dipping or electroplating.

An instrument for detecting or measuring small electrical current.

Gas Out
A hole blown in the jacket of a cable during the extrusion process.

A term used to describe the physical size of a wire. As the AWG number gets smaller, the diameter of the wire gets larger.

One billion hertz (109HZ) equal to 1 KMC (1000 megacycles).

Glass Braid
Used to provide thermal and/or mechanical protection to the underlying insulation of certain types of conductors.

Used primarily as a coating or plating material because of its electrical properties.

A conducting connection between an electrical circuit and the earth or other large conducing body to serve as an earth, thus making a complete electrical circle.

Ground Conductor
A conductor in a transmission cable or line that is grounded.

Ground Insulation
The insulation used between a winding and the magnetic core or other structural parts, usually at ground potential.

Ground Loop
The generation of undesirable current flow within a ground conductor, owing to the circulation currents which originate from a second source of voltage.

Ground Plane
Expanded copper mesh which is laminated into some flat cable constructions as a shield.

Ground Potential
Zero potential with respect to the ground or earth.

Any of five elements: fluorine, chlorine, bromine, iodine and astatine. These elements may be combined with insulation compounds to enhance flame retardancy.

Hard-Drawn Wire
Wire that has not been annealed after drawing.

An arrangement of wires and cables, usually with many breakouts, which have been tied together or pulled into a rubber or plastic sheath, used to interconnect an electric circuit.

Hazardous Location
A location where fire or explosion hazards may exist because of flammable gases, vapors, or liquids; combustible dust; or ignitable fibers or flyings.

High density Polyethylene

Heat Distortion
Distortion of flow of a material or configuration due to the application of heat.

Heat Resistance
The ability of an insulation compound to resist degradation caused by high temperatures.

Heat Shock
Test to determine stability of a material by sudden exposure to a high temperature for a short period of time.

Spiral winding.

Unit of inductance such that the induced voltage in volts is numerically equal to the rate of change in current in amperes per second.

Hertz (Hz)
A term for replacing cycles-per-second as the unit of measure for frequency.

Heterogeneous Insulation
A cable insulating system composed of two or more layers of different insulating materials.

A test designed to determine the highest potential that can be applied to conductor without breaking through the insulation.

High Strength Alloy Conductor
A conductor which shows a maximum 20% increase in resistance and a minimum of a 70% increase in breaking strength over the equivalent construction in pure copper while exhibiting a minimum elongation of 5% in 10 inches

High Voltage
Generally considered to be a wire or cable with an operating voltage of over 600 volts.

High-Temperature Wire and Cable
Electrical wire and cables having thermal operating characteristics of 150°C and higher.

High Molecular weight Polyethylene

Hook-up Wire
A single insulated conductor used for low-current, low voltage (usually under 600 volts) applications within enclosed electronic equipment.

Hot Conductor
The underground phase conductors of an electrical system connected to the circuit breaker or fuse.

Hot Tin Dip
A process of passing bare wire through a bath of molten tin to provide a coating.

High Voltage

Hybrid Cable
Multi-conductor cable containing two or more types of components.

A type of material that absorbs some water from the air around it.

International Annealed Copper Standard

Insulated Cable Engineers Association

Internal Diameter

European Standardization agency; International Electrotechnical Commission.

Institute of Electrical and Electronics Engineers.

Ignition Cable
Cable designed for Automotive Ignition Systems.

Impact Strength
Test for ascertaining the punishment a cable configuration can withstand without physical or electrical breakdown, by impacting with a given weight, dropped a given distance in a controlled environment.

The total opposition that a circuit offers to the flow of alternating current or any other varying current at a particular frequency. It is a combination of resistance (R) and reactance (X), measured in ohms.

Impulse Strength
The voltage breakdown of insulation under voltage surges on the order of microseconds in duration.

Impulse Test
An insulation test in which the voltage applied is an impulse voltage of a specified wave shape.

Individual Strand Diameter
The diameter of an individual strand of a stranded wire.

Measured in henries. A property of an electric current by which an electromotive force is induced in it by a variation of current either in the circuit itself or in a neighboring circuit.

Inductive Coupling
Crosstalk resulting from the action of the electromagnetic field of one conductor on the other.

Insulated Conductor
A conductor to which an insulating material has been applied to withstand a predetermined voltage gradient.

Insulated Wire
A conductor of electricity covered with a non-conducting material.

A material having high resistance to the flow of electric current. Often called a dielectric in radio frequency cable.

Insulation Adhesion
The degree of tightness of the insulation over the base conductor (measured in terms of force)

Insulation Crimp
The area of a terminal, splice or contact that has been formed around the insulation of the wire.

Insulation Resistance
The ratio of the applied voltage to the total current between two electrodes in contact with a specific insulation, usually expressed in megohms-M feet.

Insulation Shield
A layer of semi-conducting material or tape applied directly over the insulation of high voltage cables, usually on cables rated at over 5000 volts. In addition to this layer, some cable constructions include a layer of non-magnetic metal overlapping tape or a number of helically applied small wires.

Insulation Thickness
Wall thickness of the applied insulation.

Any undesired electrical signal introduced into a conductor by electrical or electromagnetic means.

Internal Diameter
The diameter of some internal part or composite of an object which in this case would pertain to wire, cable, etc.

Internal Wiring
Electronic wiring which interconnects components, usually within a sealed subsystem.

Voids or valleys between individual strands in a conductor or between insulated conductors in a multiconductor cable.

Ionization Voltage (Corona Level)
The minimum value of falling rms voltage which sustains electrical discharge within the vacuous or gas filled spaces in the cable construction or insulation.

Insulated Power and Cable Engineers Association

TYPE J Thermocouple. Composed of a positive leg which is iron and a negative leg which is approximately 45% nickel - 55% copper.

In insulation, the exposure of the material to high-energy emissions for the purpose of cross linking

Instrument Society of America

International Standards Organization. New England Wire Technologies is an ISO 9001:2015 registered company.

A covering applied over primary insulation, braids, shields, cable components or over the cable itself.

A short length of conductor used to make a temporary connection between terminals, around a break in a circuit or around an instrument.

A point in a circuit where two or more wires are connected.

DuPont® Company registered trademark for Polyimide film.

One thousand circular mils.

A strong, heat-resistance material used as a binding thread in SEU cable to hold the assembly together.

Kilovolt (KV)
1,000 volts

KiloVolt Ampere


Pennwalt trade name for polyvinylidene fluoride. Typically used as insulation for wire wrap wire.

A liquid resin or compound applied to textile braid to prevent fraying, moisture absorption, etc.

Laminated Tape
Tape consisting of two or more layers of different materials bonded together.

Lay Direction
The direction in which the wires of a conductor are twisted, or the twist of conductors in a cable.

Lay Length
The length measured along the axis of a wire or cable required for a single strand (in stranded wire) or conductor (in cable) to make one complete turn about the axis of the conductor or cable.

A wire, with or without terminals, that connects two points in a circuit.

Life Cycle
A test to determine the length of time before failure in a controlled, usually accelerated, environment.

Limited Smoke
A conductor rating that indicates the product has passed tests for low smoke production, short flame travel and duration.

Limits of Error
The maximum deviation (in degrees of percent) of a thermocouple or thermocouple extension wire from standard emf-temperature to be measured.

The ability of a cable to lay flat or conform to a surface.

Line Voltage
Voltage existing in a cable or circuit.

Conductors or other equipment included in a list published by a national recognized testing laboratory.

Litz Wire
a stranded (bunched) or cabled conductor made of magnet wire in which each strand is insulated from every other strand.

The amount of electrical power required by connected electrical equipment.

Local Area Network (LAN)
A baseband or broadband, interactive, bi-directional, communication system for information exchange on a common transmission line.

Longitudinal Shield
A tape shield, flat or corrugated, applied longitudinally with the axis of the core being shielded

Longitudinal Wrap
Tape applied longitudinally with the axis of the core being covered.

Loop Resistance
The total resistance of two conductors measured round trip from one end. Commonly used term in the thermocouple industry.

Energy dissipated without accomplishing useful work.

Loss Factor
The product of the dissipation and dielectric constant of an insulating material.

Low Loss Dielectric
An insulation material that has a relatively low dielectric loss, such as polyethylene or fluoropolymer.

Low Noise Cable
Cable configuration specially constructed to eliminate spurious electrical disturbances caused by capacitance changes or self-generated triboelectric noise.

Magnet Wire
Insulated wire intended for use in windings on motor, transformer and other coils for electromagnetic devices.

Marker Tape
A tape laid parallel to the conductors under the jacket in a cable, imprinted with manufacturer's name and/or specification to which the cable is made.

Marker Thread
A colored thread laid parallel and adjacent to the strand in an insulated conductor which identifies the manufacturer and sometimes the specification to which the wire is made.

A unit for measuring radiation dosage.

A testing device that applies a dc voltage to a conductor and measures the resistance (in millions of ohms) offered by the conductor’s insulation.

Microfarad, one millionth of a farad.

Megahertz; one million cycles per second.

Mineral Insulated (metal sheath) 85°C dry and wet location, 250°C special application.

An instrument used for measuring diameter usually in thousandths of an inch.

A micron is one-millionth of a meter or one twenty-five thousandth of an inch.

0.001" (1/1000 inch) one 1000th of an inch. A unit used in measuring diameter of wire or thickness of an insulation over a conductor.

One one-thousandth of a volt.

Modulus of Elasticity
The ratio of stress to strain in an elastic material.

Moisture Absorption
The amount of moisture, in percentage, that a material will absorb under specified conditions.

Moisture Resistance
The ability of a material to resist absorbing moisture from the air or when immersed in water.

Motor Lead Wire
Wire which connects to the fragile magnet wire found in coils, transformers and stator or field windings.

More than one conductor within a single cable

Simultaneous transmission of two or more messages over the same cable pair.

Mutual Capacitance
Capacitance between two conductors when all other conductors, including ground, are connected together and then regarded as an ignored ground

DuPont trademark for polyester film.

National Electrical Code® (NEC)
National Electrical Code® (NEC)

National Electrical Code® Article 725
The NEC Article which covers remote control signal and communication power limited circuits that are not an integral part of the device or appliance.

National Electrical Code® Article 760
The NEC Article which covers the fire and burglar alarms installation of wire and equipment operating at 600 Volts or less.

National Electrical Code® Article 800
The NEC Article which covers telephone, telegraph as well as outside wiring for fire and burglar alarms.

National Electric Manufacturers Association

A synthetic rubber with good resistance to oil, chemicals and flame. Also called polychloroprene.

Unwanted and/or unintelligible signals picked up on a cable circuit.

Nominal (NOM)
The preferred size or weight that is specified or indicated for a certain cable element.

A class of thermoplastic polyamides capable of extrusion when molten into fibers, sheets, etc., of extreme toughness, strength, and elasticity, synthesized by the interaction of a dicarboxylic acid with a diamine.

Overall Width

See Overall Diameter

Off Center
Conductor displaced within the cross-section of its insulation.

Percentage of a specified gas released during the combustion of insulation or jacketing material.

A unit of electrical resistance defined as the resistance of a circuit with a voltage of one volt and a current flow of one ampere.

Ohm Law’s
The formula V=I x R (voltage equals current multiplied by resistance), used for calculating voltage drop, fault current and other characteristics of an electrical circuit.

Oil Aging
Cable aged in an accelerated manner by placement in an oil bath and heated to a pre-set temperature for a stated time.

Oil Resistance
The ability of a conductor cable insulation or jacket to resist physical degradation caused by exposure to oil.

Operating Temperature
The temperature of the conductor insulation while carrying current, including the effect of ambient temperature and heat generated from the electrical current.

Occupational Safety and Health Act. Specifically the Williams-Steiger law passed in 1970 covering all factors relating to safety in places of employment.

The dissipation of gas from a dielectric, evidencing decomposition.

Overall Diameter (OD)
Finished diameter over wire or cable.

Overcurrent Device
A device such as a circuit breaker of fuse that automatically interrupts the circuit when current (in excess of a given rating), flows through the circuit because of a short circuit, overload or ground fault.

The amount the trailing edge laps over the leading edge of a spiral tape wrap.

The process of uniting a compound with oxygen, usually resulting in an unwanted surface degradation of the material or compound.

Oxygen Index
Percentage of oxygen necessary to support combustion in a gas mixture.

Oxygen-free high conductivity copper (OFHC)
has 99.5% minimum copper content with an average annealed conductivity of 101%.

A twisted pair cable is a type of cable made by putting two separate insulated wires together in a twisted pattern and running them parallel to each other.

Parallel Pair
A duplex construction of two insulated conductors laid parallel and then covered overall with a braid or jacket.

Parallel Stripe
A stripe applied longitudinally on a wire or cable parallel to the axis of the conductor.

The process of feeding a cable or wire from a bobbin, reel or other package.

Peak Voltage
The maximum instantaneous voltage of an electrical circuit.

Percent Plating
Quantity of plating on a conductor expressed as percentage by weight; thus, for the same percentage, as the conductor diameter increases, so does the thickness of the plating.

Percentage Conductivity
Conductivity of a material expressed as a percentage of copper.

Perfluoroalkoxy (PFA).
A melt processible insulation with excellent thermal and electrical insulation properties including resistance to practically all chemicals, resistance to weathering and low friction coefficient.

See Dielectric Constant.

A chemical added to XLPE to initiate the cross-linking process.

Distance between two adjacent crossover points of braid filaments. The measurement in picks per inch indicates the degree of coverage.

Picks Per Inch (P/I)
The number of times the carriers in a braid cross over each other in the same direction along the longitudinal axis for each inch of length.

One-millionth of one-millionth of a farad. A micromicrofarad or picofarad (abbreviation pf). (See µµF).

A chemical added to insulation compounds to impart color for circuit identification.

Pigtail Wire
Fine-stranded, extra-flexible, ropelay lead wire attached to a shield for terminating purposes.

Planetary Cabler
A cabler capable of laying down any number of shielded overbraided or jacketed singles, pairs, (called groups) or any combination of them in sequence.

Planetary Twister
A twisting machine whose pay-off spools are mounted in rotating cradles that hold the axis of the spool in a fixed direction as the spools are revolved so the wire will not kink as it is twisted

Plastic Deformation
Change in dimensions under load that is not recovered when the load is removed.

A chemical agent added to plastics to make them softer and more pliable.

The application of one metal over another.

Power Limited Tray Cable, tray rated cable for power limited circuits, generally shielded pairs/triads and overall shield, meets U.L. Standard #13 and used in accordance with N.E.C. Article #725


A synthetic polymer of a type made by the linkage of an amino group of one molecule and a carboxylic acid group of another, including many synthetic fibers such as Nylon.

Chemical name for Neoprene.

Polyethylene terephthalate extensively as a moisture-resistant cable core wrap.

Polyethylene (PE)
A thermoplastic material having excellent electrical properties, low dielectric constant and very high insulation resistance. Can be stiff to very hard, depending on molecular weight and density. Moisture resistance is rated excellent.

A general name for polymers containing halogen atoms. The halogens are fluorine, chlorine, bromine and iodine.

Available for high-temperature wire insulation in both tape form and as a film coating.

A substance made of many repeating chemical units or molecules. The term polymer is often used in plase of plastic, rubber or elastomer.

Any of the polymer and copolymers of the ethylene family of hydrocarbons, such as polyethylene and polypropylene.

A thermoplastic similar to polyethylene but stiffer and having a higher softening point (temperature). This material is used primarily as an insulation material. Typically, it is harder than polyethylene which makes it suitable for thin wall insulations

Polytetrafluoroethylene (PTFE).
A synthetic fluoropolymer of tetrafluoroethylene that has numerous applications. The best known brand name of PTFE-based formulas is Teflon by Chemours.

This plastic usually used as a jacketing material and offers good abrasion and is very flexible. Not normally used for insulation.

Polyvinyl Chloride (PVC)
A thermoplastic material composed of polymers of vinyl chloride which may be rigid or elastomeric, depending on specific formulation.

Multiple voids in an insulation cross-section.

Power Cables
Cables of various sizes, construction and insulation, single- or multi-conductor, designed to distribute primary power to various types of equipment.

Power Factor
The ratio of resistance to impedance. The ratio of the actual power of an alternating current to apparent power. Mathematically, the cosine of the angle between the voltage applied and the current resulting.

Primary Insulation
The first layer of nonconductive material applied over a conductor. Its function is to act as an electrical insulation.

Propagation Delay
Time delay between input and output of signal.

Propagation Time
Time required for a wave to travel between two points on a transmission line.

Original design or first operating model.

Proximity Effect
Non-uniform current distribution over the cross-section of a conductor caused by the variation of the current in a neighboring conductor.

Pounds per Square Inch

Pulse Cable
A type of coaxial cable constructed to transmit repeated high-voltage pulses without degradation.

Refers to packaging of wire and cable, the term itself refers to the packaged product that is ready to be stored or shipped out.

Polyvinyl chloride, a common thermoplastic insulation and jacketing material for building wire and cable.


An enclosed channel designed expressly for holding conductors and cables, including conduit and tubing, wireways and busways.

Rated Temperature
The maximum temperature at which an electrical component can operate for extended periods without undue degradation or safety hazard.

Rated Voltage
The maximum voltage at which an electrical component can be operated for extended periods without undue degradation or safety hazard.

A measure of the combined effects of capacitance and inductance on an alternating current. The amount of such opposition varies with the frequency of the current. The reactance of a capacitor decreases with an increase in frequency. The opposite occurs with an inductance.

A contact device installed at an electrical outlet for the connection of a single attachment plug.

Red Plague
A powdery brown-red oxide of silver formed with water or rocket fuel fumes. It is highly conductive and can flake off and cause shorts in electrical equipment.

The consecutive drawing of wire through a series of dies to reach a desired wire size.

A revolvable flanged device made of wood or metal, used for winding flexible metal wire or cable.

Reflection Loss
The part of a signal which is lost due to reflection of power at a line discontinuity.

Reinforced Sheath
The outermost covering of a cable that has cable sheath constructed in layers with the addition of a reinforcing material, usually a braided fiber, molded in place between layers

The property of a substance to return to its original configuration after release of an applied force.

A measure of the difficulty in moving electrical current through a medium when voltage is applied. It is measured in ohms.

Resistive Conductor
A conductor with high electrical resistance.

The longitudinal electrical resistance of a conductor of unit length and unit cross-sectional area, expressed in ohms-circular-mils per foot; the opposite of conductivity.

Retractile Cable
A coiled cable that returns by its own stored energy from an extended condition to its original retracted form.

Return Wire
A ground wire or the negative wire in a direct-current circuit.

Radio Frequency Interference.

General utility-grade military coaxial cable.

Ribbon Cable
A cable composed of individually insulated conductors laid parallel and held together by extrusion, bonding or woven textile yarn.

Two or more insulated conductors in a parallel configuration which may be separated to leave the insulation of each conductor intact.

The solid round metallic form of copper and aluminum which is the most effective shape from which to draw wire.

The Restriction of Hazardous Substances Directive 2002/95/EC, short for Directive on the restriction of the use of certain hazardous substances in electrical and electronic equipment, was adopted in February 2003 by the European Union restricting the use of Hazardous Substances.

Rope Concentric
A group of standard conductors assembled in a concentric manner.

Rope Lay Cable
A concentric, stranded cable designed for flexibility with its individual members made up of strands which are either concentric stranded or bunched.

Rope Lay Conductor
A conductor composed of a central core surrounded by one or more layers of helically-laid groups of wires.

Rope Unilay
A group of stranded conductors assembled in a unilay manner.

Revolutions Per Minute

Rubber (Wire Insulation)
Term used to describe wire insulations made of thermosetting elastomers, occur naturally or may be made synthetically.

That point at which a material exceeds its elastic limit and physically comes apart as opposed to yield strength, elongation, etc.

Society of Automotive Engineers

Sag (conductor)
The vertical distance between a suspended conductor and an imaginary straight line connecting the points of suspension. Sag may be measured at the mid point between the suspensions, the lowest point of the conductor or at any specified point.

Secondary Insulation
Secondary Insulation

Characteristic of a material whose flame is extinguished after the igniting flame source is removed.

Self-Supporting Cable
Made with a steel support strand capable of supporting its own weight across spans.

Semi-Conducting Jacket
A jacket having a sufficiently low resistance so that its outer surface can be kept at substantially ground potential.

A cable containing a flexible inner core and a relatively inflexible sheathing.

An insulation cross-section having a partially open space between the conductor and the insulation perimeter.

A nonconductive material made slightly conductive by the addition of a specific sum of conductive material.

A layer of insulating material which is placed between a conductor and its dielectric, between a cable jacket and the components it covers or between various components of a multiple-conductor cable.

A filament or group of filaments such as fibers or wires, wound around a central core.

A wrapping applied over the core of a cable or over a wire. Servings may be in the form of filaments, fibers, yarn, tape, etc. Often referred to as a binder.

The protective covering applied to cables. Also referred to as jacket.

A tape, serve or braid (usually copper, aluminum or conductive metal) placed around or between electric circuits or cables or their components, to prevent signal leakage or interference.

Shield Coverage
The amount of optical coverage, usually expressed percentage. For most cables the value runs between 85% and 90%.

Shield Effectiveness
The ability of a shield to screen out undesirable signals.

Short Circuit
A load that occurs when an ungrounded conductor comes into contact with another conductor or grounded object.

A current used to convey information, either digital, analog, audio or video

Silicone Rubber
Jacketing material made from silicone and oxygen. Noted for high heat resistance and excellent electrical properties plus ozone resistance, low moisture absorption, weather resistance and radiation resistance.

Silicone Treating
A silicone liquid treatment applied to insulated conductors to allow for easy jacket stripping.

Silver is similar to gold in corrosion resistance. It costs less than other precious metals. It is very soft when fully annealed but work hardens during fabrication. It provides very good conductivity and solderability. It is widely used as plating or coating.

Applying a material to a surface to fill pores.

Skeleton Braid
Widely separated braid of fiber copper, or steel, used to hold core together, for reinforcing jacket or for shielding.

Skin Effect
In an AC system, the tendency of the outer portion of a conductor to carry more of the current as the frequency of the AC increases.

A braided, knifed or woven tube used over wires or components as insulation tubing. Also called Sleeving.

Solid Conductor
A conductor consisting of a single wire.

Spark Test
A test preformed on wire and cable to determine the amount of pin holes or defects in the insulation.

Silver plated copper

Specific Gravity
The density (mass per unit volume) of any material divided by that of water at a standard temperature. Most insulations range in values of .9 to 1.9.

Spiral Shield
The ratio of the density (mass per unit volume) of a material to that of water.

Spiral Stripe
A color-coding stripe applied helically to the surface of an insulated wire or cable.

Spiral Wrap
the helical wrap of a material over a core; also referred to as a serve.

A connection of two or more conductors or cables to provide good mechanical strength as well as good conductivity.

A metallic compound added to PVC to maintain the integrity of the insulation compound during processing and use.

One of the wires, or groups of wires, of any stranded conductor.

Strand Lay
The distance of advance of one strand of a spirally-stranded conductor, in one turn, measured axially.

Stranded Conductor
A conductor composed of a group of wires, or of any combination of groups of wires. (Note: The wires in a stranded conductor are usually twisted or braided together.)

To remove insulation from a cable.

Sunlight Resistance
The ability of a conductor or cable insulation to resist degradation caused by exposure to ultraviolet rays.

Surface Resistively
The resistance of a material between two opposite sides of a unit square of its surface. Surface resistively may vary widely with the conditions of measurement.


The process of accumulating wire or cable onto a reel, bobbin or some other type of pack. Also, the device for pulling wire or cable through a piece of equipment or machine.

Tank Test
A voltage dielectric test in which the test sample is submerged in water and voltage is applied between the conductor and water as ground.

Tape Wrap
A spirally applied tape over an insulated or uninsulated wire.

Taped Insulation
Insulation of helically-wound tapes applied over a conductor or over an assembled group of insulated conductors.

A term used to describe the discoloration of a material caused by exposure to a corrosive environment.

Tear Strength
The force required to initiate or continue a tear in a material under specified conditions.

Teflon FEP
Registered trademark of DuPont® Company. Fluorinated ethylene propylene (FEP). A 200°C rated Fluoropolymer that can be used for insulation and jacket applications.

Teflon PFA
Registered trademark of the DuPont® Company. Perfluoroalkoxy (PFA). A 250°C rated Fluoropolymer that can be used for insulation and jacket applications.

Teflon TFE
Registered trademark of the DuPont® Company. Tetrafluoroethylene (TFE). A 260°C rated Fluoropolymer that can be used for insulation and jacket applications.

DuPont’s trade name for fluorocarbon resins. FEP, PFA and TFE are typical materials.

Registered trademark of the DuPont Company. Ethylene tetrafluoroethylene (ETFE), is a 150°C rated Fluoropolymer that can be used for insulation and jacket applications.

The softness of a metal; terms such as soft-drawn, dead soft, annealed, and semi-annealed are used to describe tempers used for conductor metals.

Temperature Rating
The maximum temperature at which the insulating material may be used in continuous operation with a loss of 50% of its original properties.

Tensile Set
The condition when a plastic material shows permanent deformation caused by a stress, after the stress is removed.

Tensile Strength
The pull stress required to break a given specimen.

Tension Member
A member included in a fiber cable to add tensile strength.

Metal wire termination devices designed to handle one or more conductors and to be attached to a board bus or block with mechanical fasteners or clipped on

Test Lead
A flexible, insulated lead wire used for making tests, connecting instruments to a circuit temporarily or for making temporary electrical connections.

Canadian Standard Association type appliance wires. Solid or stranded single conductor, plastic-insulated. 600V, up to 105°C.

Textile Braid
Any braid made from threads of cotton, silk or synthetic fibers.

Tetrafluoroethylene. A thermoplastic material with good electrical insulating properties, chemical and heat resistance. Rated to 260°C.

Themal Shock
The resulting characteristics when a material is subjected to rapid and wide range changes in temperature in an effort to discover its ability to withstand heat and cold.

Thermal Aging
Exposure to a thermal condition or programmed series of conditions for predescribed periods of time.

Thermal Expansion
The expansion of a material when subjected to heat.

Thermal Rating
The maximum and/or minimum temperature at which a material will perform its function without undue degradation.

Thermal Resistance of a Cable
The resistance offered by the insulation to the flow of heat from the conductor(s) to the earth.

Thermocouple Lead Wire
An insulated pair of wires used from the couple to a junction box.

Thermocouple Wire
A two conductor cable with each conductor employing a dissimilar metal, made up specifically for temperature measurements.

A plastic material, a polymer, that becomes pliable or moldable above a specific temperature and solidifies upon cooling.

A material which hardens or sets when heat is applied and which, once set cannot be resoftened by heating. The application of heat is called “curing.”

Tinned Wire
Copper wire that has been coated with a layer of tin or solder to facilitate soldering.

There are two types: Electrotinned and Hot-Dipped. Electrotinned is the process of electroplating the surface of a conductor material with a tin or tin-lead alloy. Hot-Dipped is the process of pulling the conductor material through a molten bath of the tin or tinlead alloy.

A type of electrical conductor comprised of a number of threads, each thread having a fine, flat ribbon of copper or other metal closely spiraled about it. Used for small size cables requiring flexibility and long flex life.

Tinsel Wire
A low voltage, stranded wire where each strand is very thin conductor ribbon spirally wrapped around a textile yarn.

A specified allowance for deviation from a standard dimension, weight or property.

A marker in a cable often used as a means of identifying polarity.

Transfer of electric energy from one location to another through conductors or by radiation or induction fields.

Transmission Loss
The decrease or loss in power during transmission of energy from one point to another. Usually expressed in decibels.

Interchanging the relative positions of wires to neutralize the effects of induction to, or from other circuits or, to minimize interference pickup by the lead-in during reception.

Tray Cable
A factory-assembled multiconductor or multi-pair control cable approved under the National Electrical Code for installation in trays.

Triboelectric Noise
Noise generated in a shielded cable due to variations in capacitance between shielding and conductor as the cable is flexed.

True Concentric
A cable in which each successive layer has a reversed direction of lay from the preceding layer.

A tube of extruded nonsupported plastic material

A device for twisting together two conductors.

Twisted Pair
A cable composed of two insulated conductors, twisted together without a common covering.

Underwriters Laboratories. An organization which tests and verifies construction and performance of electronics parts and equipment.

Ultraviolet (UV) Inhibitor
Chemicals in a PVC insulation compound protect the insulation from breaking down when exposed to sunlight.

Ultraviolet Degradation
The degradation caused by long time exposure of a material to sunlight or other ultraviolet rays containing radiation.

Unidirectional Concentric Stranding
A stranding where each successive layer has a different lay length, thereby retaining a circular form without migration of strands from on layer to another.

Unidirectional Stranding
A term denoting that in a stranded conductor all layers have the same direction of lay.

Unilay Strand
A conductor constructed with a central core surrounded by more than one layer of helically-laid wires, with all layers having a common length and direction of lay.

Velocity of Propagation
The speed of an electrical signal down a length of cable compared to speed in free space expressed as a percent. It is the reciprocal of the square root of the dielectric constant of the cable insulation.

Very High Frequency, 30 to 300 MHz.

Volt (V)
A unit of electrical pressure. One volt is the amount of pressure that will cause one ampere of current in one ohm of resistance.

Electrical potential or electromotive force expressed in volts.

Voltage Drop
A term used to express the amount of voltage loss in a conductor of given size and length drawing a given current.

Voltage Rating
The highest voltage that may be continuously applied to a wire or cord in conformance with standards or specifications.

Voltage Withstand Test
A field or factory test in which a conductor is subjected to a higher than normal AC or DC voltage.

Volume Resistivity
(Specific Insulation Resistance) The electrical resistance between opposite faces of a 1-cm cube of insulating material, commonly expressed in ohm-centimeters.

A chemical reaction in which the physical properties of an elastomer are changed by reacting it with sulfur or other cross-linking agents.

Wall Thickness
The thickness of the applied insulation or jacket.

Water Absorption Test
A test to determine the water absorbed by a material after a given immersion period.

Waterblocked Cable
A cable constructed with no internal voids in order to allow no longitudinal water passage under a given pressure.

A unit of electrical power. One watt is equivalent to the power represented by one ampere of current under a pressure of one volt in DC circuit.

The ability of a material to absorb moisture.

The longitudinal flow of a liquid in a wire or cable due to capillary action.

A conductor, either insulated or bare.

Wire Gauge
A system of numerical designations of wire sizes. See American Wire Gauge (AWG)

Crosslinked Polyethylene

Yield Strength
The lowest stress at which a material undergoes deformation. Below this stress, the material is elastic; above it, viscous.

Designation for impedance, expressed on ohm (See Impedance)

DuPont’s trade name for nylon resins.