Master Catalog Page 565 Glossary

Alpha Wire 1-800-52 ALPHA Specifications subject to change. For complete specifications and availability, visit 565 Glossary abrasion resistance Ability of a wire or cable material to resist surface wear. accelerated aging A test in which voltage, temperature, etc., are increased above normal operating values to obtain observable deterioration in a relatively short period of time. The plotted results give expected service life under normal conditions. accelerator A chemical additive which hastens a chemical reaction under specific conditions. adhesive lined For heat-shrink tubing, an inner lining that, when heated, adheres to the substrate, providing additional strength and environmental sealing. admittance The measure of the ease with which an alternating current flows in a circuit. The reciprocal of impedance. aging The change in properties of a material with time under specific conditions. air-spaced coaxial cable One in which air is the essential dielectric material. A spirally wound synthetic filament or spacer may be used to center the conductor. alloy A metal formed by combining two or more different metals to obtain desirable properties. ALS A type of cable consisting of insulated conductors enclosed in a continuous, closely fitting aluminum tube. 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 surrounding an object. ampacity See current-carrying capacity. ampere The unit of current. One ampere is the current flowing through one ohm of resistance at one volt potential. analog circuit Output of electrical signals as a continuous function of input, as contrasted with digital circuit. anneal Relief of mechanical stress through heat and gradual cooling. Annealing copper renders it less brittle. annealed wire Wire, which after final drawdown, has been heated and slowly cooled to remove the effects of cold working. ANSI American National Standards Institute. anti-oxidant A substance which prevents or slows down oxidation of material exposed to air. arc resistance The time required for an arc to establish a conductive path in a material. armor A braid or wrapping of metal, usually steel, used for mechanical protection. Generally placed over the outer jacket. ASA American Standards Association. Former name of ANSI. ASCII American Standard Code for Information Interchange. ASME American Society of Mechanical Engineers. ASTM American Society for Testing and Materials, a nonprofit industry-wide organization which publishes standards, methods of test, recommended practices, definitions and other related material. attenuation Power loss in an electrical system. In cables, generally expressed in dB per unit length, usually 1000 ft. audio frequency The range of frequencies audible to the human ear. Usually 30 Hz to 20,000 Hz. AWG American Wire Gauge. A standard system for designating wire diameter. AWM Appliance Wiring Material. backbone wiring The physical/ electrical interconnections between telecommunications closets and equipment rooms. Cross-connect hardware and cabling in the main and intermediate cross-connects are considered part of the backbone wiring. balanced circuit A circuit so arranged that the impressed voltages on each conductor of the pair are equal in magnitude but opposite in polarity with respect to ground. band marking A continuous circumferential band applied to a conductor at regular intervals for identification. bandwidth The difference between the upper and lower limits of a given band of frequencies. Expressed in hertz (Hz). baud Unit of data transmission speed representing bits per second. 9600 baud = 9600 bits per second. bend radius The radius of curvature that a wire or cable can bend without causing any damaging effects.

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