sin where the acceptance angle.
Pick Distance between two adjacent crossover points of
braiding wires laments, measured picks per inch.
Neoprene synthetic rubber thermosetting material
with good resistance oil, chemical, and ame, known
as polychloroprene mostly used jacketing.
Polyester (PETP) resin formed the reaction
between dibasic acid and dithydroxy alcohol.
Norges Elektriske Materiellkontroll.
1DWLRQDO(OHFWULF&RGH$UWLFOH The NEC Article
which covers the and burglar alarms installation of
wire and equipment operating 600 Volts less.
National Electric Code (NEC) set regulations
governing construction and installation electrical wiring
and apparatus the United States, established the
American National Board Fire Underwriters.
NEMA National Electrical Manufacturers Association.
2]RQH,QGH[ Percentage oxygen necessary to
support combustion gas mixture. The value of
resistance through which potential difference one volt
will maintain current one ampere.
NEMKO Approval agency Norway.1139
Y
N
National Electric Code Article 725 The NEC Article
which covers remote control, signal and communication
power limited circuits that are not integral part the
device appliance. the IBM Cabling System, length
of Type cable with data connectors
on both ends. Value indicate the
neutrality.
OVE Approval agency Austria.
Plenum The air return way central air handling
system, either ductwork open space over dropped
ceiling.
Patch Panel Distribution area rearrange ber
connections and circuits. Synonym: optical waveguide.
Overlap certain portion foil band which
laps over the leading edge helical longitudinally
wrapping tape.
A rubber-like compound for jacketing and also for
insulating where cables are subject rough usage,
oils, moisture, solvents, greases and chemicals.
GLOSSARY TERMS: CABLES AND WIRES
.
OSHA Abbreviation for Occupational Safety and Health
Act. Neper 8,686 decibels. Numbers below result increasing acidity and
number greater than increasing alkalinity.
Ozone faintly blue gasious, reactive form oxygen,
obtained the silent discharge electricity ordinary
oxygen air.
P
Pair insulated wires twisted together certain lay-
length built single circuit transmission line.
NA sin -max =
n2
1 n2
2
Nylon group polyamide polymers, used for wire
and cable jacketings with good chemical and abrasion
resistance.
Plenum Cable Cable approved Underwriters
Laboratories for installation plenums without the need
for conduit. Administrative Sponsor the National
Electric Code (ANSI Standards Committee CI).
O
Ohm The electrical unit resistance.
Plug The part the two mating halves connector
which movable when not fastened the other mating
half.
Neper electrical unit similar decibel, used to
express the ratio between two amount power existing
at two distinct points.
pH The measure acidity alkalinity substance.
Polyethylene terephthalate, used extensively moisture
resistant cable core wrap.
NFPA Abbreviation for National Fire Protection
Association.
Numerical Aperture The “light-gathering ability“
of ber, ning the maximum angle the ber axis at
which light will accepted and propagated through the
ber.
Optical Fiber Any lament ber, made dielectric
materials, that guides light, whether not used to
transmit signals.
Patch Cord exible piece electrical cord
terminated both ends with plugs, used for
interconnecting circuits pasteboard.
Patch Cable cable with plugs terminals each
end the conductors temporarily connect circuits of
equipment together.
PH values are described from 14.
Pigtail short length optical ber, permanently
xed component, used couple power between the
component and transmission ber. Speci cally the Williams-Steiger law passed in
1970 covering all factors relating safety places of
employment.
Polychloroprene Chemical name neoprene
