3.19.2
Isolation Transformers
Except where indicated otherwise, provide a transformer for each group of
four 45-watt lights and install in handhole or manhole as indicated.
3.19.3
Equipment in Control Tower, Vault, Manhole, and Handholes
Provide nameplates to match and fit existing lighting control panels in
locations as directed. Provide equipment, wiring, and nameplates in runway
field lighting vault, in system brightness control manhole, and in
handholes as indicated.
3.19.4
Wire and Connectors
Provide THWN insulation for secondary conductors between isolation
transformers and simulated carrier deck fixtures. Provide two-pin
connectors in accordance with FAA AC 150/5345-26.
3.20
APPROACH LIGHTING SYSTEM
Install approach lighting system as indicated and specified. Provide
nameplates for equipment, controls, devices, and for each lighting circuit.
3.20.1
Frangible Requirements
At the 305 meter 1,000 foot crossbar and beyond, mount overrun lights up to
1830 mm 6 feet above concrete foundations on threaded frangible couplings
and 53 mm 2 inch electrical metallic tubing (EMT). For mounting heights
greater than 1830 mm 6 feet, install lights on LIR frangible supports.
When rigid towers, trestles, and similar structures are required, mount the
light unit at least 6100 mm 20 feet above the rigid structure with support
unit between the two being frangible.
3.20.2
Alignment
Align lights in azimuth, with beams axes parallel to the approach lighting
system centerline. Aim elevated lights vertically at a point on the glide
path with the angular elevation of each light as indicated. Semiflush
lights have a preset vertical aiming angle and require alignment in azimuth
only.
3.21
FIELD QUALITY CONTROL
Give the Contracting Officer [5][_____] working days notice prior to
[each][_____] test[s]. Correct deficiencies found and repeat tests.
3.21.1
Operating Test
After installation has been completed, conduct an operating test.
Demonstrate equipment to operate in accordance with the requirements of
this section. Conduct tests [one][_____] day and [one][_____] night for
the Contracting Officer.
[3.21.2
**************************************************************************
NOTE: Electromagnetic interference tests are
expensive and may not be practical in the field.
Examine requirements for these tests very closely.
SECTION 16522N
Page 39
Previous Page
