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[V]
Valley - any void between the
insulated conductors of cable or between a cable
core and it's covering. See also interstice
Velocity of Propagation - The
transmission speed of electrical energy in a length
of cable compared to speed of light in free space.
Usually expressed as a percentage.
VHF - Very High Frequency. International
Telecommunication Union designation for the 30-300
MHz band of frequencies.
Video Pair Cable - a transmission
cable containing low-loss pairs with impedance of
125 ohms. Used for TV pick ups, closed circuit TV,
telephone carrier circuits, etc
Volt - A unit of electromotive
force.
Voltage - Electrical potential
of electromotive force expressed in volts.
Voltage Levels - power-limited
0-300 volts, low voltage 600-2000 volts, medium
voltage 5000-69000 volts.
Voltage Rating - The highest voltage
that may be continuously applied to a cable construction
in conformance with standards or specifications
Voltage Stranding Wave Radio (VSWR) -
the ratio of the maximum effective voltage to the
minimum effective voltage measured along the length
of miss-matched radio frequency transmission line.
Volume Resistively (Specific Insulation
Resistance) - the electrical resistance
between opposite faces of a 1 cm. cube of insulating
material, commonly expressed in ohms/centimeter.
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