required for a complete and operational system shall be provided.
Electrical work shall be in accordance with NFPA 70 and Section 16402
INTERIOR DISTRIBUTION SYSTEM.
3.1.1
Power Supply for the System
A single dedicated 120 volt, single phase branch-circuit connection for
supplying power to the monitoring center equipment shall be provided as
shown on the Contract Drawings. The backup power supply shall be
automatically energized upon failure of the normal power supply. The
primary power shall be supplied from a panelboard circuit breaker or
disconnect switch which shall be red in color and locked in the energized
position. Panel shall be marked "FIRE ALARM CIRCUIT CONTROL" with a rigid
plastic nameplate. Transmitter 120 Vac power shall be extended from each
building's fire alarm panel.
3.1.2
Wiring for Systems
Wiring for systems shall be installed in rigid conduit, intermediate
metallic conduit, or electric metallic tubing. The conductors for central
station alarm system shall not be installed in conduits, junction boxes, or
outlet boxes with conductors of lighting and power systems. Conduit shall
be 13 mm 1/2 inch minimum in accordance with NFPA 70. No more than one
conductor shall be installed under any screw terminal. Circuit conductors
entering or leaving any mounting box, outlet box enclosure or cabinet shall
be connected to screw terminals with each terminal marked in accordance
with the wiring diagram. Connections and splices shall be made using screw
terminal blocks. Wire nut type connectors shall not be used in the system.
Wiring within control equipment shall be readily accessible without
removing component parts. The Contractor shall submit wiring diagrams as
specified in the Submittals paragraph.
3.2
OVERVOLTAGE AND SURGE PROTECTION
Equipment connected to alternating current circuits shall be protected from
surges per IEEE C62.41 and NFPA 70. Cables and conductors which serve as
communications links, except fiber optics, shall have surge protection
circuits installed at each end. Fuses shall not be used for surge
protection.
3.3
GROUNDING
Grounding shall be provided to building ground. Maximum impedance to
ground shall be 25 ohms. If the maximum impedance to ground exceeds 25
ohms, ground rods shall be driven. Ground rods shall not protrude more
than 150 mm 6 inches below grade and shall be bonded to building ground.
3.4
TESTING
The Contractor shall notify the Contracting Officer 30 days before the
performance and acceptance tests are to be conducted and shall submit the
test procedures to be used. The tests shall be performed in the presence
of the Contracting Officer under the supervision of the central fire alarm
system manufacturer's qualified representative. The Contractor shall
furnish all instruments and personnel required for the tests.
3.4.1
Upon completion of the installation, the system shall be subjected to a
SECTION 13853A
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