| 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 |
