PRIMARY INSULATION - The first layer of non conductive material applied over a conductor, whose prime function is to act as electrical insulation.
PRIMARY VOLTAGE - Initial or main voltage.
PROP. - Abbreviation for propagation.
PROPYLENE - A flammable gaseous hydrocarbon C3H6 obtained by cracking petroleum hydrocarbons.
PS - Abbreviation for polystyrene. See polystyrene.
PS TAPE - Nonmetallic shielding, very flexible. Remains in positive contact with insulation. Prevents formation of air gaps between conductor and insulation.
psi - Abbreviation for pounds per square inch.
PTFE - Abbreviation for polytetrafluoroethylene. See polytetrafluoroethylene. Most common trade name is Teflon®. Teflon® is a trademark of the DuPont de Nemours Co.
PU - Abbreviation for polyurethane. See polyurethane.
PUFF - Colloquial term for one picofarad. See picofarad.
PULLING EYE - A device on the end of a cable to which a pulling line is attached for pulling the cable into a conduit or duct.
PULSE CABLE - Type of coaxial cable with or without a magnetic core constructed to transmit repeated high voltage pulses without degradation. Usually multi-shielded.
