
L-861SE Clamp Band ERTE
96A0193 Rev. i
Installation
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14
2.4.6 Stake Installation
The light fixture is mated with a 30-inch (762-mm) steel stake with a fitting attached at the top
to receive the male thread of the frangible coupling. Stake mounting requires transformers,
cables, and connectors that are designed for direct earth burial.
To install a stake, perform the following procedure:
1. See Figure 7. Install the stake (4) in 6-inch (152.4-mm) diameter holes at a depth of 30
inches (762 mm) so that the mounting hub of the stake is level.
2. Make electrical connections as required and backfill around the stake with thoroughly
compacted earth that has passed through a 1-inch (25.4-mm) sieve.
NOTE:
Backfill with concrete in case of unstable soil conditions.
3. Install the top of the stake even with ground level and maintain within 1 degree of the
vertical.
NOTE:
In areas where frost may cause heaving, anchor the stake with concrete and use a
permeable backfill material such as sand around the buried electrical components. Cover
the top surface with an impervious material to reduce moisture penetration.
4. Insert the male L-823 plug from the light fixture into the secondary receptacle of the
transformer, and install the light fixture on the stake. Refer to Assembly Instructions in this
section for light fixture assembly procedures.
5. See Figure 3. Remove the outer globe (1), if installed. Place a level (such as a circle
bubble level) on top of the head assembly and level the light fixture by adjusting the four
Phillips head screws (7) in the lower casting (11).
6. See Figure 5. Place the outer globe on the fixture, and check for outer globe and inner
lens direction.
NOTE:
To verify that the lens is oriented correctly, the arrows on top of the lens must point
to the runway side. Arrows should point toward the runway when the fixture is installed
parallel with the runway or when the fixtures are installed perpendicular to the runway to
mark a displaced threshold. When fixtures are located at the end of the runway, the
arrows should point to the imaginary extension of the runway centerline. Always make
sure that the colored lens location is in compliance with the airport project plans and
specifications.
CAUTION
• Do not drive stakes. Driving a stake may damage the stake and cause
light fixture misalignment. Refer to FAA specification AC 150/5340-24.
CAUTION
• When installing the light fixture on the stake, avoid twisting wires.
Twisting wires may damage wire connections, create a fire hazard, and
adversely affect equipment performance.