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Labeled |
Equipment or materials to which has been
attached a label, symbol, or other identifying mark of an
organization that is acceptable to the authority having
jurisdiction and concerned with product evaluation, that
maintains periodic inspection of production of labeled equipment
or materials, and by whose labeling the manufacturer indicates
compliance with appropriate standards or performance in a
specified manner.
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Lagging Load |
An inductive load with current lagging voltage.
Since inductors tend to resist changes in current, the current
flow through an inductive circuit will lag behind the voltage.
The number of electrical degrees between voltage and current is
known as the "phase angle". The cosine of this angle
is equal to the power factor (linear loads only).
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Lead
and Lag |
(See "Phase Difference")
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Lighting Outlet |
An outlet intended for the direct connection of
a lampholder, a luminaire (lighting fixture), or a pendant cord
terminating in a lampholder.
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Line Conditioner |
This term isn't used consistently, therefore its
meaning has been blurred. The term is sometimes used to describe
equipment that provides some type of filtering or Regulation to
an AC power source and may be any of the following devices:
Surge Suppressor, Ferroresonant Transformer, AC Filter or Tap
Changing Regulator.
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Line Imbalance |
Unequal loads on the phase lines of a multiphase
feeder.
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Linear Load |
A load in which the current relationship to
voltage is constant based on a relatively constant load
impedance.
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Listed |
Equipment, materials, or services included in a
list published by an organization that is acceptable to the
authority having jurisdiction and concerned with evaluation of
products or services, that maintains periodic inspection of
production of listed equipment or materials or periodic
evaluation of services, and whose listing states that the
equipment, material, or services either meets appropriate
designated standards or has been tested and found suitable for a
specified purpose.
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Live Parts |
Energized conductive components.
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Load |
The amount of power used.
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Load Balancing |
Switching the various loads on a multi-phase
feeder to equalize the current in each line.
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Location, Damp |
Locations protected from weather and not subject
to saturation with water or other liquids but subject to
moderate degrees of moisture. Examples of such locations include
partially protected locations under canopies, marquees, roofed
open porches, and like locations, and interior locations subject
to moderate degrees of moisture, such as some basements, some
barns, and some cold-storage warehouses.
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Location, Dry |
A location not normally subject to dampness or
wetness. A location classified as dry may be temporarily subject
to dampness or wetness, as in the case of a building under
construction.
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Location, Wet |
Installations under ground or in concrete slabs
or masonry in direct contact with the earth; in locations
subject to saturation with water or other liquids, such as
vehicle washing areas; and in unprotected locations exposed to
weather.
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Luminaire |
A complete lighting unit consisting of a lamp or
lamps together with the parts designed to distribute the light,
to position and protect the lamps and ballast (where
applicable), and to connect the lamps to the power supply.
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