References
References
Glossary of Terms
electrical apparatus or the terminals on the apparatus
to which a signal or power is applied.
KVA (Kilovolt ampere)
KW (Kilowatt)
N
NA (Numerical Aperture)
A measure of the angular acceptance for a fiber.
Insertion Force
The force required to insert a contact into the mating
contact.
L
National Electrical Code (NEC)
LED (Light Emitting Diode)
A solid-state device, which emits light when current,
passes through it.
A set of regulations governing construction and
installation of electrical wiring and apparatus in the
United States, established by the American National
Board of Fire Underwriters.
Insulation
A material having good dielectric properties that is
used to separate close electrical components, such
as cable conductors and circuit components.
LF (Low Frequency)
NEMA (National Electrical Manufacturers
Association) – sets the standards for industrial
control equipment.
Line Voltage
The value of the potential existing on a supply or
power line.
Insulation Resistance
The resistance measured in Ohms at a designated
voltage between two or more conductors separated
by the insulation whose resistance is being
measured.
NEMA 4
Load
Intended for indoor or outdoor use primarily to
provide a degree of protection against windblown
dust and rain, splashing water and hose directed
water.
A device that consumes power from a source and
uses that power to perform a function.
IP (Ingress Protection)
Rating of protection.
M
IP65
NEMA 6
M (Mutual Inductance)
The alpha character for Mutual Inductance.
Dust tight. An environmental protection for a type of
enclosure - according to the German Standard DIN
40050. Provides protection against water spray from
all directions at 43 PSI through a 12mm nozzle.
Intended for indoor or outdoor use primarily to
provide a degree of protection against entry of water
during occasional temporary submersion at a limited
depth.
mA (Mill Ampere)
One thousandth of an ampere.
IP67
NEMA 6P
MATV (Master Antenna Television)
Protected against the effects of temporary immersion
Intended for indoor or outdoor use primarily to
provide a degree of protection against entry of water
during occasional temporary submersion at a limited
depth. (Requirement; 6 ft. of water for 24 hours).
in water (30 minutes – depth of 1 meter).
MF (Microfarad)
One millionth of a farad.
IP68
Protected against the effects of continuous
immersion in water at a pressure specified by the
manufacturer. Lumberg’s requirement is 10 Bar (143
PSI) at 24 hours.
MH (Megahertz)
A unit of frequency equal to one million hertz.
Neoprene
Is a synthetic rubber with good resistance to
oil, chemical and flame. Also referred to as
polychloroprene.
Moisture Resistance
The ability of a material to resist absorbing moisture
from the air or from water when immersed.
Irradiation
Relating to a cable jacket where the material is
exposed to high-energy emissions for the purpose of
cross-linking the molecular structure.
Nitrile (Buna)
This is a rubber like manmade material used
extensively in gasket and sealing applications.
Molded Plug
A connector over molded onto either end of a cord
or cable.
IRS (Ignition Radiation Suppression)
Nm (Nanometer)
One billionth (10-9) of a meter.
MOV (Metal Oxide Varistor)
A solid-state device used to suppress voltage
surges/spikes.
ISO (International Standards Organization)
Noise
J
In a cable or circuit, any extraneous electrical signal
that tends to interfere with the signal normally
present in or passing through the system.
MSHA (Mine Safety and Health Administration)
Jacket
Multibox
A rubber or plastic covering applied over the primary
insulation, braids, shields, and cable components.
Sometimes referred to as Distribution or Junction Box
- designed to distribute a signal to multiple locations.
Normally Closed
The state of the output or switch is ON with no
external influence.
K
mV (Millivolt)
One thousandth of a volt.
KPSI
Normally Open
Tensile strength expressed in thousands of pounds
per square inch.
The state of the output or switch is OFF with no
external influence NPN (Sinking) Acronym used
to describe the polarization of a bipolar junction
transistor (BJTs). Also associated with a sinking
output.
mW (Millwatt)
One thousandth of a watt.
KV (Kilovolt)
The measurement of Kilovolt=1000 volts
Mylar
The DuPont trademark for polyester film.
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145
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