| Term | Description |
|---|---|
| P.O.S. | Abbreviation for Point-of-Sale |
| Pair | 2 insulated wires of a single circuit associated together |
| Pairing | The union of 2 insulated single conductors through twisting |
| PAP | A commonly used term for air core (unfilled) direct burial telephone cable with a corrugated aluminum shield |
| Parallel Cable | Two insulated conductors in parallel in a cable |
| PASP | An air core (unfilled) direct burial telephone cable used in areas subject to rodent attacks. It consists of an unfilled cable core, corrugated aluminum shield, corrugated steel tape, flooding compound and polyethylene jacket. |
| Peak Voltage | The maximum instantaneous voltage |
| Pennsylvania Bureau of Deep Mine Safety (P-MWMS) | Responsible for the health and safety of underground mines, caves and other commercial operations |
| Percent Conductivity | Conductivity of a material expressed as a percentage of that of copper |
| Periodicity | The 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 |
| Permittivity | See definition for "Dielectric Constant" |
| Pick | Distance between two adjacent crossover points of braid filaments |
| Pitch | In flat cable, the nominal distance between the index edges of two adjacent conductors |
| Pitch Diameter | Diameter of a circle passing through the center of the conductors in any layer of a multi-conductor cable |
| Plastic Deformation | Change in dimensions under load that is not recovered when the load is removed |
| Plasticizer | A chemical agent added to plastics to make them softer and more pliable |
| Plenum | The air return path of a central air handling system, either ductwork or open space over a dropped ceiling |
| Plenum cable | A flammability rating established by Underwriters Laboratories for wires and cables that pass a specially designed vertical flame test. This designation has been replaced by VW-1. |
| Polychloroprene | A synthetic rubber that possesses better characteristics than SBR, used mostly as jacket material. Has operating temperature range of -55°C to 90°C. |
| Polyester | Polyethylene terephthalate which is used extensively in the production of a high strength moisture resistant film used as a cable core wrap |
| Polyester Elastomer | A flexible thermoplastic that can be used in place of rubber and some urethanes, with maximum operating temperature of 90°C |
| Polyethylene | A thermoplastic material having the chemical identity of polymerized ethylene |
| Polymer | A substance made of many repeating chemical units of molecules (the term polymer is often used in place of plastic, rubber, or elastomer) |
| Polyolefin | A generic 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. |
| Polypropylene | A thermoplastic polymer of propylene |
| Polyvinyl Chloride (PVC) | A thermoplastic material composed of polymers of vinyl chloride which may be rigid or elastomeric, depending on specific formulation |
| Polyvinylidene Fluoride (PVDF) | A compound that contains fluorine in molecular structure, with a temperature range of -40°C to 150°C and affords high resistance to acids and alkalis |
| Porosity | Multiple air voids in an insulation or jacket wall |
| Potting | The sealing of a cable termination or other component with liquid which thermosets into an elastomer |
| Power Factor | The 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. |
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