18
Installation
Modulator High Powered Omni Speaker (Model MOD Series)
Federal Signal www.fedsig.com
NOTE: Siren cable is run through the center of the mounting plate through the steel pole.
The siren cable can be pre-assembled through center of mounting plate for a no-conduit
installation.
INSTALLATION PRECAUTIONS: The eyebolt does NOT have sufficient strength
to support the combined weight of the siren and a utility pole. Therefore, do NOT
attempt to erect the pole and siren together using the eyebolt as a lifting point.
Figure 4 Steel Pole Mounting
1/2-13 X 2" LG.
S.S. SCREWS
1/2" SPLIT S.S.
LOCKWASHER
1/2-13 S.S. NUT
HEAVY
NOTE:
TO AVOID GALVANIC CORROSION
INSTALL RUBBER INSULATOR 8570080
BETWEEN SIREN BASE PLATE AND
POLE BASE PLATE.
USE S.S. SHIMS BETWEEN MTG. PLATES
IF MATING SUFACES ARE NOT FLUSH
TO AVOID WELDMENT CRACKS
291349A
4. Attach the modulator base to the pole’s top plate with rubber insulator 8570080
between them.
5. Use four stainless steel 1/2-inch bolts, nuts, and lock washers provided. (See Figure
4.) All mounting hardware needed is supplied in the hardware kit shipped with this
manual. Not all the hardware in the kit will be used in this type of installation. Before
tightening bolts, check mounting surfaces for warping. If the modulator base and top
plate of pole have a gap greater than approximately 1/16 inch between them, install
galvanized or stainless steel shims to even it out. Tighten bolts to 45-46 ft-lb torque.
