Terminal lugs shall be coordinated with the wire size. Switches shall be
securely fastened to the supporting structure or wall using not less than
four 6.4 mm 1/4 inch bolts. The use of sheet metal screws will not be
allowed.
3.14.4
Magnetic Contactors
**************************************************************************
NOTE: Mechanically held, electrically operated
magnetic contactors shall be used to control
operation of the lighting system circuits.
**************************************************************************
Terminal lugs shall be coordinated with the wire size. Switches shall be
securely fastened to the supporting structure or wall using not less than
four 6.4 mm 1/4 inch bolts. The use of sheet metal screws will not be
allowed.
3.14.5
CCTV Alarm Interface
**************************************************************************
NOTE: Delete this paragraph if assessment infrared
lights are not used. Determine the number of alarm
inputs needed for the alarm interface. Calculate
the percentage of expansion for future needs, and
determine if 10 percent is adequate.
**************************************************************************
An alarm interface shall be furnished with the lighting control system.
The interface shall be compatible with the CCTV alarm annunciation system.
The alarm interface shall monitor alarm closures for processing by the
system CPU. Alarm inputs to the alarm interface shall be relay contact or
through an EIA ANSI/EIA/TIA-232-F interface. The alarm interface shall be
modular and shall allow for system expansion. The alarm interface to be
installed at the site shall be configured to handle [_____] alarm points,
and shall have an expansion capability of not less than [10] [_____]
percent. An output shall be provided to actuate a video recorder.
3.15
GROUNDING
**************************************************************************
NOTE: Butt grounds will not be permitted as an
option in dry desert areas. See TM 5-811-1/AFM
88-9, Chapter 1.
**************************************************************************
Grounding shall be in conformance with NFPA 70, the contract drawings, and
the following. Grounding conductors shall be soft-drawn, stranded copper.
Ground rods shall be driven into the earth so that after the installation
is complete, the top of the ground rod will be approximately 300 mm 1 foot
below finished grade, except in handholes. [Butt grounds made of at least
4 m 13 feet of No. 6 bare copper wire stapled to the butts of wood poles in
spirals may be used where a ground resistance of 25 ohms or less can be
obtained by this method.] [Butt grounds shall not be used.]
3.15.1
Ground Rods and Pole Butt Electrodes
**************************************************************************
NOTE: Designer will determine the size, type, and
SECTION 16528A
Page 43
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