Page 106 of Current Product Catalog by World Class Wire and Cable

level ­ a measure of the difference between a quantity or value and an established reference lf ­ low frequency a band of frequencies extending from 30 to 300 khz in the radio spectrum designated by the federal communications commission lighting ground cable ­ a specially stranded single conductor cable connecting lighting rods air terminals protecting buildings to adequate ground such as grounding rods light pen ­ a photocell or photo-multiplier mounted in a pen-shaped housing that can be held against a crt screen to measure or change the display limpness ­ the ability of a cable to lay flat or conform to s surface as with portable or microphone cables line drop ­ a voltage loss occurring between any two points in a power transmission line such loss or drop is due to the resistance or leakage of the line line equalizer ­ a reactance inductance and/or capacitance connected in series with a transmission line to alter the frequency-response characteristics of the line line fault ­ a fault such as an open circuit short circuit or ground in an electrical line circuit line level ­ the level of a signal at a certain point on a transmission line usually expressed in decibels line voltage the value of the potential existing on a supply or power line lissajous figure ­ a special case of an x-y plot in which the signals applied to both axes are sinusoidal functions useful for determining phase and harmonic relationships litz wire ­ very fi ne usually #44 bare copper each strand is enamel insulated and nylon wrapped formerly silk low inductance coil windings ­ high frequency applications load ­ a device that consumes or converts the power delivered by another device load cell cable small multi-conductor shielded cables for connecting load cells with instruments in electronic strain gauges also used for weighing and force measurement applications loaded line ­ a transmission line that has lumped elements inductance or capacitance added at uniformly spaced intervals loading is used to provide a given set of characteristics to a transmission line loading ­ see loaded line loca ­ loss of coolant accident the test used to simulate a nuclear reactor accident characterized by high radiation high temperature etc local area network lan ­ a network that is located in a localized geographical are e.g an office building complex or buildings or campus and whose communications technology provides a highbandwidth low-cost medium to which many nodes can be connected logging cable ­ usually fepo/tefzel self-supporting instrumentation cable generally dropped through borings in subsurface mining or well applications long-haul network ­ a network most frequently used to transfer data over distances from several thousand feet to several thousand miles these networks can use the international telephone network to transmit messages over most or part of these distances longwall machine mining ­ a machine used to undercut coal loop test ­ a long line test where a good line is connected to a faulty line to form a loop in which measurements will locate the fault loss ­ the portion of energy applied to a system that is dissipated and performs no useful work loss factor ­ the power factor times the dielectric constant low frequency ­ a band of frequencies extending from 30 to 300 khz in the radio spectrum designated by the federal communications commission low-voltage 1 national electrical code ­ an electromotive force rated nominal 24 volts nominal or less supplied from a transformer converter or battery 2 power system voltage ratings ­ a class of nominal system voltages 1000 or less lpf low pass filter filter which greatly attenuates signals of higher than a specified frequency but passes with minimal attenuation all signals lower in frequency lrc ­ longitudinal redundancy check an error detection method also called horizontal parity check ltm ­ lan traffic monitor an optional mode of lan bridge 100 operation that provides data about network traffic a load host down-line loads the ltm software image to the lan bridge 100 unit lumen ­ a unit of measurement for light output lv ­ low voltage mca ­ micro channel architecture ibm s microcomputer architecture mcm ­ thousand circular mils e.g 500mcm is 500,000 circular mils preferred notation is kcmil mdf ­ main distribution frame mean time to failure ­ a reliability measure of a piece of equipment or process mechanical water absorption ­ a check of how much water will be absorbed by material in warm water for seven days mg/sq in surface medium frequency ­ the band of frequencies between 300 and 3,000 kilohertz medium-hard-drawn-wire ­ as applied to copper wire having tensile strength less than the minimum for hard-drawn wire but greater than the maximum for soft wire mega ­ prefi x meaning million medium voltage power system voltage ratings ­ a class of nominal system voltages greater than 1000 and less than 100,000 volts megger ­ a special ohmeter for measuring very high resistance primarily used for checking the insulation resistance of cables however it is also useful for leakage tests melinex ­ ici trademark for polyester see mylar lw ­ an electric hook-up wire with pvc insulation with or without a nylon covering braid or shielding braid 300v melt index ­ the extrusion rate of a material through a specified orifice at specified conditions member ­ a group of wires stranded together for combination with other stranded groups into a multiplemember conductor mesa ­ see msha messenger wire ­ a metallic supporting member either solid or stranded which may also perform the function of a conductor mfd ­ microfarad one-millionth of a farad obsolete abbreviation mg ­ glass reinforced mica tape insulation with an overall sheath of woven glass yarn impregnated with flame heat and moisture resistant fi nish 450c 600v appliance wire mhz ­ megahertz one million cycles per second mi ­ one or more conductors insulted with highly compressed refractory minerals and enclosed in a liquid-tight and gas-tight metallic tube sheathing micro ­ prefi x meaning one-millionth microcom networking protocol mnp ­ a set of error detection and data compression protocols developed and licensed by microcom that have become unofficial industry standards microfarad ­ one-millionth of a farad mf and mfd are common abbreviations micromicrofarad ­ one-millionth of a microfarad mmf mmfd are common abbreviations also a picofarad pf or pfd microphone cable ­ a very flexible usually shielded cable used for audio signals microphonics ­ noise caused by mechanical excitation of a system component in a single conductor microphone cable for example microphonics can be caused by the shield rubbing against the dielectric as the cable is flexed mid-split ­ a broadband cable system in which the cable bandwidth is divided between transmit and receive frequencies the bandwidth utilized m ma milliampere one-thousandth of an ampere magnetic field ­the field created when current flows through a conductor especially a coiled conductor man ­ metropolitan area network a data network linking together terminals memories and other resources at many sites within a city area each site may have its own local area network lan links between sites are usually on digital circuits rented from the local telephone company using a bit-rate appropriate to traffic requirements map ­ manufacturing automation protocol the osi profile championed by general motors corporation to provide inter-connectivity between plant hosts area managers and cell controllers over a broadband tokenpassing bus network mat ­ metropolitan area trunks matv ­ master antenna television system a small less expensive cable system usually restricted to one or two buildings such as hospitals apartments libraries hotels office buildings etc mau ­ media access unit circuitry used in lans to enable data terminal equipment to access the transmission medium maximum and minimum cable conductor diameter the largest and smallest cable conductor diameters that a high-voltage cable termination is designed to accommodate without special modifications maximum and minimum cable insulation diameter ­ the largest and smallest diameters over the insulation that a high-voltage cable termination is designed to accommodate maximum design voltage the maximum voltage at which a high voltage cable termination is designed to operate continuously under normal conditions mbit/sec ­ million bits or megabits per second a unit of data transmission speed also written mbps mc ­ denotes cable with interlocking metal tape or corrugated tube enclosure metal clad glossary 104 corporate headquarters w234 n2091 ridgeview parkway court waukesha wi 53188-1023 www.wcwc.com phone 262.951.7777 purchasing/acct fax 262.951.7704 sales fax 262.951.7778

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