operational system shall be provided.
Electrical work shall be in
accordance with NFPA 70.
3.1.1
Power Supply for the System
A single dedicated branch-circuit connection for supplying power to the
fire alarm system shall be provided. The backup power supply shall be
automatically energized upon failure of the normal power supply.
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 the fire
alarm system shall not be installed in conduits, junction boxes, or outlet
boxes with conductors of lighting and power systems. The sum of the
cross-sectional areas of individual conductors shall not exceed 40 percent
of the interior cross-sectional area of the conduit. Conduit shall comply
with NFPA 70. Ample gutter space to accommodate necessary wiring shall be
provided. 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
Ground rods shall not protrude more than 150 mm 6 inches above grade.
Noncurrent-carrying metallic parts associated with radio fire alarm
equipment shall have a maximum resistance to solid "earth" ground not to
exceed 25 ohms.
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 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
complete functional and operational performance test by the Contractor.
Test shall determine that the system is free from grounded, shorted, or
open circuits. When all corrections have been made, the system shall be
retested to assure that it is functional. Copies of performance test
reports shall be submitted in accordance with paragraph SUBMITTALS.
3.4.2
Acceptance Test
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NOTE: Listed tests are minimum required. If
additional tests are required such tests must be
SECTION 13852A
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