3.12.2.3
Special Fixtures
The types of special fixtures are designated by letters and numbers.
For
example, SP-1 denotes special type 1.
3.13
TRANSFORMER INSTALLATION
Transformers for lighting fixtures on [aluminum] [or steel] [or concrete]
poles shall be installed in the transformer base. A transformer base shall
be provided for poles that require transformers. Transformers shall be
securely mounted to steel supporting plates and bolted to wood poles.
3.14
LIGHTING CONTROL SYSTEM
3.14.1
Photo-Control
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NOTE: If automatic control of luminaires is
desired, first consideration shall be given to
photo-control. If both photo-control and remote
manual override are required for the lighting
system, a central contactor and a single system
photo-cell shall be used. Individual luminaire
photo-control of security lighting systems will not
be used where a remote manual override is required.
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Lighting luminaires shall be [controlled in banks by a single photo-control
element mounted within each bank.] [individually controlled by
photo-control elements mounted [on] [or] [adjacent to] the heads of the
luminaires.]
3.14.2
Time Control Switches
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NOTE: If automatic control of luminaires is desired
and photo-control is not used, operation by timer
control shall be provided to ensure that luminaires
come on automatically. Normally, the astronomic
dial timer control switch shall be of the
automatically wound spring mechanism type. A
battery backed electronic switch capable of
maintaining accurate time for 7 hours following a
power failure may be substituted with the approval
of the Contracting Officer.
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Switches shall be installed with not less than four 6.4 mm 1/4 inch bolts.
The use of sheet metal screws will not be allowed.
3.14.3
Manual and Safety Switches
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NOTE: Manual switches shall be used for control of
the lighting system when controls are located in a
space that is continuously supervised, such as a
gaurdhouse, gatehouse, or watchtower.
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SECTION 16528A
Page 42
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