| Term | Description |
|---|---|
| Power Limited Circuit Cable | UL (Underwriter's Laboratories) Standard 13; National Electrical Code (NEC) Article 725 of NFPA 70 |
| Prefused Copper | A conductor material that consists of twisted strands of heavy tinned copper fused with heat along its entire length |
| Primary Insulation | The first layer of nonconductive material applied directly over a conductor |
| Propagation Delay | Time required for a signal to pass from the input to the output of a device |
| Propagation Time | Time required for an electrical wave to travel between two points on a transmission line |
| Pulling Eye | A device fastened to a cable to which a hook might be attached in order to pull the cable into or from a duct |
| Pulse | A 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 Cable | A type of coaxial cable constructed to transmit repeated high voltage pulses without degradation |
| Pyrometer | See definition of "Thermocouple Thermometer" |
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