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Term Description
Unilay More than one layer of helically laid wires where the direction and length of lay are consistent for each layer
UV Resistance The ability of a material to resist ultra violet (UV) light, or sunlight
Valley Any void between the insulated conductors of a cable or between a cable and its core. See Interstices.
Velocity of Propagation (VP) The speed a signal travels down a length of cable as compared to the speed in free air and is directly dependent upon the dielectrical material properties
VHF Abbreviation for Very High Frequency (30 to 300 MHz)
Video Pair Cable A transmission cable containing low-loss pairs with an impedance of 125 ohms; used for TV pick ups, closed circuit TV, telephone carrier circuits, etc.
Volt A unit of electrical pressure. One volt is the amount of pressure that will create one ampere of current in one ohm of resistance.
Voltage Electrical potential or electromotive force expressed in volts
Voltage rating The highest voltage that may be continuously applied to a wire in conformance with standards or specifications
Voltage Standing Wave Ration (VSWR) The ratio of the maximum effective voltage to the minimum effective voltage; measured along the length of a mis-matched radio frequency transmission line
Volume Resistivity(Specific Insulation Resistance) The electrical resistance between opposite faces of a 1 cm. cube of insulation material; commonly expressed in ohms-cm
Vulcanization An irreversible process in which a rubber or polymeric compound becomes thermoset through changes to its chemical structure (for example, cross-linking)
VW-1 A flammability rating established by Underwriters Laboratories for wires and cables that pass a specifically designed vertical flame test; formerly designated FR-1
Wall thickness The thickness of applied insulation or jacket
Water Absorption The percentage of water weight absorbed by a material after a given immersion period
Watt 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 a DC circuit
Wavelength The distance of a repetitive electrical pulse or waveform between two successive points; measured in the direction of propagation
WEEE The abbreviation for Waste Electrical & Electronic Equipment. This makes the manufacturer responsible for disposal of products that have reached the end of life status.
Wicking The longitudinal flow of liquid in a wire or cable due to capillary action
Wind Turbine Tray Cable UL (Underwriter's Laboratories)Standard 2277; National Electrical Code (NEC) Article 336 of NFPA 70
Wire A single conductor, typically includes a covering of insulation
Wire Gauge A measure of the diameter of sizes of wires. The sizes are expressed by numbers.
Working Voltage See definition of "Voltage Rating"
XLP Crosslinked polyethylene
Yield Strength The minimum stress at which a material will start to physically deform without further increase in load
Z-Fold A type of fold that is a combination of metal-to-metal contact with the addition of an isolation fold
Zytel DuPont's trade name for nylon resins

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