UFC 3-260-11FA
25 May 2005
Expansion of an existing LV shall be with the same or similar
materials to the existing LV construction. All equipment and
controls shall be protected from dust during construction. The
existing LV being expanded shall, at all times, be provided with
a secure structure. The building heating and ventilation and
lighting systems shall be expanded as required.
1.20.4.4
Auxiliary LV
An auxiliary LV shall be located in near proximity to the main LV
and shall be self-contained, including equipment and controls and
control panel.
1.20.4.5
New LV
New LVs shall be located in conformance with the guidelines in
UFC 3-535-01.
1.20.5
Interruption of Service
The ATCT and Air Base Management shall be notified at least
seventy-two (72) hours before any service interruption to any
existing visual navigation systems for the purpose of vault
construction or modification to existing circuits. Such work
shall be carefully organized to minimize any interruption to
existing
NAVAIDS.
A
completion
schedule
for
any
NAVAID
interruption must be approved before any service interruption.
1.20.6
Hangar Electrical Systems
a.
Hazardous Areas
Hangar area, including the bays and all adjoining areas,
NOT CUT OFF AND VENTILATED shall be rated Class 1, Division
1, Group D per NEC article 513 from floor level and below.
Hangar area, including the bays and all adjoining areas
from 18 inches away from the walls and up to the hangar
door level, shall be rated Class 1, Division 2, Group D per
NEC article 513. Two (2) design solutions for the adjoining
area are:
1.
Elevate all the adjoining areas 18 inches above the
hangar bay floor and provide a ventilation system
separate from the hangar bay areas.
2.
Provide a vestibule with automatic door closures and
a ventilation system separate from the hangar bay
areas for each door entering into the bay areas.
b.
400 Hz
Raceways for the 400Hz wiring shall be Rigid Aluminum
Conduit where installed above grade and in schedule 80PVC
where installed below grade or floor level.
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