L-852A-D, J & K ITCF, F-Range, ICAO LED Taxiway Centerline Light
96A0460 Rev. C
Installation
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12
2.3.3 Installing the Fixture
This section provides installation instructions for the L852C-D and ICAO ITCF fixtures.
NOTE:
Also see the following:
— “Installing a New Optical Unit” on page 28.
NOTE:
Light Detail:
2.3.3.1 Overview of Sequence
of Work
1. Electrical contractor locates new light bases and interconnecting conduit trench, and
excavates for light base bottom section by saw cutting or core drilling. Electrical contractor
prepares subgrade and stone subbase, sets bottom section with rebar, rigid steel conduit
stubs and drain, and pours high early strength concrete-encasement excavation.
Electrical contractor shall record can locations and elevations of mud plate after concrete-
encasement.
Electrical contractor excavates conduit trench, installs rigid steel and fittings, backfills
conduit trench with high early strength concrete.
2. General contractor prepares and installs concrete pavement. Electrical contractor makes
a pilot core to find mud plate center point indent before final core-drilling.
3. Electrical contractor core-drills concrete pavement. Electrical contractor installs top
section, y-flange ring, space and lighting fixture, and pours epoxy joint sealer. Provide
space for adjustment with spacers, maximum number of spacers shall be 3.
4. Se specific details as shown in FAA AC 150/5340-30 (current edition).
1. Light bases shall be installed with care to assure vertical & azimuth alignment of
fixture.
2. Provide 2'-3' cable slack within light base to allow transformer servicing.
3. Bolts and washers used during installation of base, cable and transformers shall
be replaced with new, for final installation. The minimum thread engagement into
top flange of base is 0.5".
4. As required to ma0/ through -1/16" below grade FAA installation
tolerance, a maximum of three spacer rings may be stacked together.