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Figure 3:
Base Mounting
2.4.3 Light Fixture
Mounting
To install the light fixture on the base, perform the following procedure:
1. See Figure 4. Connect the primary power line to the appropriate isolation transformer.
Refer to Table 4 for the appropriate isolation transformer.
NOTE:
Use a brick to raise the isolation transformer so that it is about 3 inches (76.2 mm)
above the bottom surface of the L-867 base (2) to avoid the possibility of the transformer
being partially immersed in water in case water accumulates under the level of the ducts
or pipes.
2. After you have connected the transformer, check the continuity of the series loop.
3. Wrap the connector joints in the primary circuit with at least one layer of rubber or
synthetic rubber tape and one layer of plastic tape one-half lapped, extending at least
1-1/2 inches (3.81 mm) on each side of the joint.
4. Clamp the female secondary plug from the L-830 transformer to the L-867 base plate
fitting.
5. Bolt the base plate (1) with the base plate gasket to the L-867 base using six 3/8 16
stainless steel bolts. Apply a drop of Loctite Grade AV to each bolt thread and use a
torque wrench to torque bolts to 100 inch-pounds (11.3 Nt-m).
6. Connect the male L-823 plug (3) from the light fixture to the female transformer plug on
the secondary lead of the L-830 transformer.
7. See Figure 2. Loosen the frangible coupling screw (10) holding the coupling (9) to the
light fixture column (8). Screw the coupling into the female thread on the base plate.
NOTE:
Apply anti-seize compound to the coupling threads to improve coupling removal
and prevent thread corrosion.
8. Install the column with light fixture attached on the frangible coupling and tighten the
coupling screw. Refer to Assembly Instructions in this section.
1. Base Plate
2. L-867 Base
3. L-823 Connector
4. Two-foot Slack for Connections (Minimum)
5. 5 KV, L-824 Cable
7. L-830 Transformer
8. Four Inches Concrete Backfill Recommended
9. Frangible Coupling and Disconnect Plug
6. Optional Bare Copper Counterpoise Wire
14-in (35 cm)
(Standard)