producing loads on power systems. Harmonic
compensation may include, but is not limited to:
specifying K-rated transformers, derating
transformers, oversizing neutrals to 200% of the
ampacity of the phase conductors or phase bus, using
phase conductors and terminals with higher
ampacities and/or higher temperature ratings,
supplying non-linear loads from dedicated isolation
transformers, and installing shunt filters. See
UGGS-16415A for further guidance.
Surge suppression and power conditioning receptacle
modules are available. However power conditioning
for specific loads (particularly portable equipment)
is normally a User responsibility and is not
furnished as part of the construction contract. The
Air Force has identified specific responsibilities
of the user and suppliers of end-use equipment.
(See Air Force ETL 89-6 for specific criteria or
verify specific requirements for electrical support.)
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Power distribution shall be provided as indicated on the drawings. The
panels [and] [spine wall] shall have an internal [power] [and]
[communications] raceway and the capability of disconnecting and connecting
external circuits to the electrified raceway in the panel [and] [spine
wall]. The communications receiving raceway shall have capacity for at
least [six] [twelve] [twenty] 4-pair category 5 cables. Power and
communications wiring may share a common wireway if a metal divider is
included to ensure electrical isolation. Doors or access openings shall be
included for entry of communications cable. The electrified power raceway
shall be of the [8-wire] [6-wire] [or] [5-wire] configuration indicated.
[Unless otherwise indicated, conductors of the 8-wire system shall be
allocated as follows: the three-phase system shall have one equipment
ground, one isolated ground, [one neutral] [one oversized (133% minimum)
neutral], and two each dedicated phase.] [Unless otherwise indicated,
conductors of the 8-wire system shall be allocated as follows: the
three-phase system shall have one equipment ground, one isolated ground,
[one neutral per phase] [one oversized (133% minimum) neutral per phase],
and one each dedicated phase.]
2.9.3.1
Receptacles
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NOTE: 15 AMP receptacles are the current industry
standard. If 20 amp receptacles are required, the
channel depth for the receptacle may have to be
increased. Coordinate with the panel and/or spine
wall thickness.
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Power receptacles shall be provided in the powered panels [and spine
walls]. Devices shall be placed at the locations indicated on the plans
and shall be connected to the designated circuits. [Electrical outlets
should have the ability to be hung at [200 mm 8-inch] [multiple] [_____]
vertical increments throughout the frame via power harnesses.] Unless
otherwise indicated, receptacles shall be [15 amp (NEMA 5-15R)] [20 amp
(NEMA 5-20R)] commercial grade conforming to NEMA WD 1 and NEMA WD 6. If
receptacles are not interchangeable or will not permit field adjustment of
SECTION 12705
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