be acceptable as approved.
2.23.1
Accessories
Accessories such as straps, mounting plates, nipples, or brackets shall be
provided for proper installation.
2.23.2
Special Fixtures
The types of special fixtures are designated by letters and numbers.
For
example, SP-1 denotes special Type 1.
2.23.3
In-Line Fuse
An in-line
fuse shall be provided for each fixture, and shall consist of a
fuse and a
UL approved waterproof fuse holder rated [at 30 amperes, 600
volts] [as
indicated], with insulated boots. Fuse rating shall be [600
volts] [as
indicated].
2.24
SEARCHLIGHTS
Special type [_____] searchlights shall be [304.8 mm 12 inch] [457.2 mm 18
inch] [609.6 mm 24 inch] nominal size and shall be of weatherproof,
dust-tight, corrosion-resistant construction. Each searchlight shall
include a housing and hinged door, two reflectors, a receptacle, a
trunnion, and a base. Searchlights shall be provided for operation at [120
Vac] [[_____] Vdc]. Each searchlight shall have a range for observing
objects the size of an automobile at [243.8] [365.8] [457.2] [609.6] m
[800] [1200] [1500] [2000] feet on a clear night. Searchlights shall be
[hand-controlled, with pedestal base and slip rings] [pilot-house
controlled, with low base and slip rings]. The housing and hinged door
shall be made of nonferrous metal. A heat-resistant, clear, smooth cover
glass tempered to withstand sudden changes in temperature shall be gasketed
and mounted to the door. The door shall be gasketed to form a weatherproof
seal. A parabolic reflector of silver-mirrored glass or aluminum
approximately 6.4 mm 1/4 inch thick shall be mounted at the back of the
housing, and a spherical auxiliary reflector designed to permit relamping
shall be mounted in front of the lamp. The auxiliary reflector shall have
a permanent, nontarnishing, nonabsorptive aluminum oxide reflecting
surface. Receptacle shall be of proper size to receive the lamp and shall
be installed in a manner to ensure accurate positioning of the light
center. Searchlights shall be arranged for horizontal and vertical
adjustment. Stranded, two-conductor, weatherproof, flexible cable shall
feed out of the housing through a weatherproof entrance bushing.
Searchlights shall be optically arranged to provide a horizontal and
vertical beam spread of [2.5] [3.5] [4.5] [5.5] [6.5] [7.5] [8.5] [_____]
degrees. Provision shall be made for tilting searchlights to any position
within 45 degrees above and below the horizontal. The searchlights shall
be provided with slip rings to permit continuous horizontal rotation.
[Each searchlight installation shall include a [_____] 12 volt [_____] kVA
transformer conforming to UL 506.] [Searchlight installation on guard
towers Nos. [_____] shall also include a manually operated, two-pole,
enclosed transfer switch, a 200 ampere-hour, 12 volt, lead-acid, flat
pasted positive plate design storage battery, and an automatic battery
charger. The battery charger shall be silicon type, full wave, with high
and low charging rate, arranged to go on high rate after resumption of
power and emergency discharge, and return to low rate automatically when
battery has reached full charge. An ammeter shall be provided in the
charging circuit to indicate rate of charge.]
SECTION 16528A
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