Master Catalog Page 572 Glossary

Alpha Wire www.alphawire.com 1-800-52 ALPHA Specifications subject to change. For complete specifications and availability, visit www.alphawire.com. 572 Loc-Trac Alpha Wire's registered trademark for a zipper tubing closure track which does not require any sealants to keep it closed. local area network (LAN) A baseband or broadband interactive bidirectional communication system for voice, video or data use on a common cable medium. longitudinal shield A tape shield, flat or corrugated, applied parallel to the axis of the core being shielded. longitudinal shrinkage A term generally applied to shrink products denoting the discrete axial length lost through heating in order to obtain the recovered diameter. loop resistance The total resistance of two conductors measured round trip from one end. loss Energy dissipated without accomplishing useful work. loss factor The product of the dissipation and dielectric constant of an insulating material. low loss A cable that has relatively small power loss over long lengths. low-loss dielectric An insulating material that has a relatively low dielectric loss, such as polyethylene or PTFE. LSZH Low-smoke, zero halogen. An insulating material that contains no halogens or other potentially toxic materials and that generates very low levels of smoke when burned. magnetic field The region within which a body or current experiences magnetic forces. magnetic flux The rate of flow of magnetic energy across or through a surface (real or imaginary). magnetic noise Caused by change in current level, e.g. AC powerline (creates magnetic field around that cable) this magnetic field causes the magnetic noise. mastic A meltable coating used on the inside of some shrink products which, when heated, flows to encapsulate the interstitial air voids. MCM Thousand circular mils. mega- (M) A numerical prefix denoting 1,000,000 (10 6 ). meter Unit of measurement, one meter equals 3.28 feet. mho The unit of conductivity. The reciprocal of an ohm. MHz Megahertz (one million cycles per second). micro- A numerical prefix denoting one-millionth (10 -6 ). microwave A short (usually less than 30 cm) electrical wave. mil A unit used in measuring diameter of a wire or thickness of insulation over a conductor. One- one thousandth of an inch (.001"). milli- (m) Prefix meaning 1/1000 (10 -3 ). millimeter One millimeter equals 0.03937 inches. MIL-SPEC Military Specification. A document of the U.S. Government, issued to define a product that will be used in military end-use applications. mismatch A termination having a different impedance than that for which a circuit or cable is designed. modulation The coding of information onto the carrier frequency. Modulation means include (among others) amplitude, frequency, or phase pulse many forms of on-offdigital coding. 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. monomer The basic chemical unit used in building a polymer. MSHA Mine Safety and Health Administration. MTW Machine tool wire. multiconductor More than one conductor within a single cable complex. mutual capacitance Capacitance between two conductors when all other conductors including ground are connected together and then regarded as an ignored ground. nano- A numerical prefix denoting one-billionth (10 -9 ). nanosecond One billionth of a second (10 -9 second). NBFU National Board of Fire Underwriters. NBS National Bureau of Standards. Glossary

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