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Glossary/Dictionary

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Term Description
P.O.S.Abbreviation for point-of-sale
Pair2 insulated wires of a single circuit associated together
PairingThe union of 2 insulated single conductors through twisting
PAPA commonly used term for air core (unfilled) direct burial telephone cable with a corrugated aluminum shield
Parallel CableTwo insulated conductors in parallel in a cable
PASPAn air core (unfilled) direct burial telephone cable used in areas subject to rodent attack. It consists of an unfilled cable core, corrugated aluminum shield, corrugated steel tape, flooding compound and polyethylene jacket.
Peak voltageThe maximum instantaneous voltage
Percent ConductivityConductivity of a material expressed as a percentage of that of copper
PeriodicityThe uniformly spaced variations in the insulating diameter of a transmission cable that result in reflections of a signal, when its wavelength or a multiple thereof is equal to the distance between two diameter variations
PermittivitySee dielectric constant
PickDistance between two adjacent crossover points of braid filaments
PitchIn flat cable, the nominal distance between the index edges of two adjacent conductors
Pitch DiameterDiameter of a circle passing through the center of the conductors in any layer of a multiconductor cable
Plastic DeformationChange in dimensions under load that is not recovered when the load is removed
PlasticizerA chemical agent added to plastics to make them softer and more pliable
PlenumThe air return path of a central air handling system, either ductwork or open space over a dropped ceiling
Plenum cableCable approved by Underwriters Laboratories for installation in plenums without the need for conduit
PolyesterPolyethylene terephthalate which is used extensively in the production of a high strength moisture resistant film used as a cable core wrap
PolyethyleneA thermoplastic material having the chemical identity of polymerized ethylene
PolymerA substance made of many repeating chemical units of molecules. The term polymer is often used in place of plastic, rubber, or elastomer.
PolyolefinA genetic name for a thermoplastic based upon the unsaturated hydrocarbons known as olefins. When combined with butylene or styrene polymers they form compounds such as polyethylene and polypropylene.
PolypropyleneA thermoplastic polymer of propylene
Polyvinyl Chloride (PVC)A thermoplastic material composed of polymers of vinyl chloride which may be rigid or elastometric, depending on specific formulation
PorosityMultiple air voids in an insulation or jacket wall
PottingThe sealing of a cable termination or other component with liquid which thermosets into an elastomer
Power FactorThe ratio of resistance to impedance. The ratio of the actual power of an alternating current to apparent power. Mathematically, the cosine of the angle between the voltage applied and the current resulting.
Primary InsulationThe first layer of nonconductive material applied directly over a conductor
Propagation DelayTime required for a signal to pass from the input to the output of a device
Propagation TimeTime required for an electrical wave to travel between two points on a transmission line
Pulling EyeA devise fastened to a cable to which a hook may be attached in order to pull the cable into or from a duct
PulseA current or voltage that changed abruptly from one value to another and back to the original value in a finite length of time. Used to describe one particular variation in a series of wave motions.
Pulse CableA type of coaxial cable constructed to transmit repeated high voltage pulses without degradation
PyrometerSee thermocouple Thermometer