SS72012 datasheet(123/144 Pages) ACIT

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Aerospace | Military | Transportation | Industrial | Specialty

Glossary

Abrasion Resistance: A measure of the ability of a wire, wire covering

or material to resist surface wear from abrasion.

AC: Designation for branch circuit and feeder cables with ﬂexible metal

tape armor.

A.C. or A-C: Abbreviation for alternating current.

Accelerated Life Test: A test in which wire or cable is subjected to

elevated electrical or environmental conditions over a speciﬁc period of

time.Measurements of performance under these conditions, and over

this time span, are extrapolated to predict the performance of the wire

or cable over longer periods of time under normal electrical or

environmental conditions.

Accelerator: A chemical additive which hastens a chemical reaction

under given conditions, known also as a promoter or sensitizer.Used in

plastics and rubber compounding to reduce curing time.

Adjacent Conductor: Any conductor touching another conductor

within a multi-conductor cable, whether in the same layer or an

adjacent layer.

Admittance:The measure of ease with which an alternating current

ﬂows in a circuit.The reciprocal of impedance.

Aircraft Ignition Cable: High tension cable for ignition systems of

internal combustion aircraft engines.

Aircraft Wire: Wire speciﬁcally intended for use in airborne

equipment, within airframes, or in aircraft engines or engine-control

systems.Designed to withstand severe environmental conditions such

as heat, cold, altitude, solvents, fuels, and moisture.

Air-spaced Coaxial Cable:One in which air is the dielectric material.

Spirally wound synthetic ﬁlaments, beads, or braided ﬁlaments may be

used to center the conductor.

Alloy: A metal formed by combining two or more elemental metals.

Alternating Current: Electric current that periodically and regularly

reverses its direction.The frequency of the change in ﬂow is expressed

in cycles per second (Hertz or Hz).

Aluminum: Aluminum conductors have good electrical and thermal

conductivity, and light weight.However, they should be used with

caution because of the possibility of galvanic corrosion if aluminum

conductors are attached to terminals or other items made of metals

other than aluminum.

Ambient Temperature: The temperature of the environment

surrounding an object.

American Wire Gage (AWG): A standard system used for designating

wire diameter.Also known as Brown and Sharpe (B & S) wire gage.

Ampere: The unit expressing the rate of ﬂow of an electrical current.

One ampere is the current ﬂowing through one ohm of resistance at

one volt potential.

Ampere’s Rule: Current in a certain direction is equivalent to the

motion of positive charges in that direction.The magnetic ﬂux

generated by the current in a wire encircles the current in the counter-

clockwise direction when it is approaching the observer.

Angle of Advance: The angle between a line perpendicular to the axis

of the cable and axis of any one member or strand of the braid.

Anneal: To heat, then cool a metal in order to relieve mechanical

stresses.Annealing metal makes it softer and less brittle.

Annealed Wire: Wire which has been softened by heating.Sometimes

referred to as a soft drawn wire.

Anti-Oxidant: Substance which prevents or slows down degradation

due to oxidation.

APICAL®: Registered trademark of Allied Chemical Corporation for its

polyimide ﬁlm product.

Arc Resistance: The measure of an insulator’s resistance to an

electrical current’s establishment of an arc (conductive path).

Armored Cable: A cable provided with an outer wrapping or bands of

metal, usually steel wires or tapes, for mechanical protection.

ASTM: American Society for Testing and Materials.Many wire and cable

materials in North America are produced to ASTM speciﬁcations.

Attenuation: Relative power loss in an electrical system.Applied to

coaxial cables, the power drop or signal loss in a circuit, expressed in

decibels (dB).

AWG: Abbreviation for American Wire Gage.

AWM: Designation for Appliance Wiring Material.

Balanced Line: A cable having two conductors which carry voltages

opposite in polarity but equal in magnitude with respect to ground.

Balun: A device for matching an unbalanced coaxial transmission line

to a balanced two line system.A balun can also provide impedance

transformation.

Bandwidth: The difference between the lowest and highest

frequency components of a signal or device, generally measured within

± 3dB of signal attenuation.

Banded Cable: Two or more cables banded together by stainless steel

strapping.

Bare Conductor: A conductor not covered with insulating material.

Baud: One bit per second.

Beaded Coax: Coaxial cable with a dielectric consisting of beads made

of insulating material.

Beryllium: A metal alloyed with copper to increase strength.

Binder: Spirally served tape or thread used for holding assembled

cable components in place while additional manufacturing operations

are performed.

Bond Strength: Amount of adhesion between bonded surfaces,

usually measured in pounds or PSI.

Bondable Wire: An insulated wire whose surface has been treated to

facilitate adhesion to other materials such as potting compounds.

Boot: Protective covering, generally ﬂexible, over the junction between

a wire or cable and a terminal or connector.Provides environmental

protection and strain relief.

Braid: Woven wire used as shielding for cables and as ground path.Also,

a woven ﬁbrous protective outer covering over a conductor or cable.

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