[2.3.1.3
Medical Emergency
Signal shall be transmitted upon operation of the publicly-accessible
"MEDICAL" lever or pushbutton on the front of the box.
][2.3.1.4
Police Emergency
Signal shall be transmitted upon operation of the publicly-accessible
"POLICE" lever or pushbutton on the front of the box.
]2.3.2
Power Source
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NOTE: Since street boxes are often not located on
or near a building, obtaining 120 VAC power can
sometimes be difficult. One acceptable source is a
continuously-energized street lighting circuit,
although this may require the use of a transformer.
If transformers are required, include section 16301,
"Overhead Transmission and Distribution" or section
16302 "Underground Transmission and Distribution" as
appropriate. Where connection to an AC power source
is impractical, a photovoltaic power system may be
specified. Consult the EFD / EFA Fire Protection
Engineer for further guidance.
**************************************************************************
AC power shall be obtained as shown for each box, through a lockable fused
disconnect switch. [Where drawings indicate AC power is not available,
street boxes shall operate from photovoltaic power system.]
[2.3.2.1
Photovoltaic Power System
Provide photovoltaic power system for street boxes without AC power source
as shown, in accordance with NFPA 72. System shall include a photovoltaic
panel, solid-state voltage regulators, interconnecting cables and necessary
supports. Photovoltaic panel shall be capable of sustaining transmitter
operation with the battery disconnected, when the light intensity is
greater than 50 percent of full sun illumination. Voltage regulator shall
prevent overcharging of the battery and reverse current flow from the
battery to the charger. Regulator shall be temperature compensated with a
control accuracy of plus or minus 0.1 volts and shall provide protection
against lightning-induced surges. Mounting supports shall be of the flat
plate, fixed tilt angle design, capable of withstanding the same wind
loading specified for transmitters and antennas. All materials shall be
sealed and weatherproof.
]2.3.3
Housing (Enclosure)
**************************************************************************
NOTE: Finish color shall be red unless requested
otherwise by the Activity and approved by the
EFD/EFA Fire Protection Engineer.
**************************************************************************
Provide
box with cast metal [cottage] [or] [contemporary
rectangular] style
NEMA 3R
housing (enclosure)per NEMA ICS 6, painted [Fire
Engine red,
similar
to color number 11105,] [Lime Yellow, similar to
color number
23793,]
FED-STD-595. Provide reflective, highly visible
labels imprinted
SECTION 13853N
Page 20
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