components. Fuses shall be externally accessible. Wire in series with the
incoming power source to the protected equipment using screw terminations.
][2.3.2
Low Voltage Surge Suppressor
Provide for all circuits which leave the building shell and as shown on the
contract drawings. When circuits interconnect two or more buildings,
provide an arrestor at the circuit entrance to each building. Suppressor
shall be UL 497B listed with a maximum 30 volt clamping level and a maximum
response time of 5 nanoseconds. Suppressor shall have multi-stage
construction and both differential/common mode protection.
]PART 3
EXECUTION
3.1
INSTALLATION
**************************************************************************
NOTE: Specify surface raceways only for retrofit
projects where concealment of wire is impractical
and wiring is not subject to physical abuse.
**************************************************************************
Installation shall be in accordance with the requirements of NFPA 70, NFPA
72 and NFPA 90A. Each conductor used for the same specific function shall
be distinctively color coded. Each function color code shall remain
consistent throughout the system. Use colors as directed by the
Contracting Officer to match existing base color coding scheme. All wiring
shall be in steel conduit or electrical metallic tubing [, except surface
mounted wiring may be in surface mounted metal raceway in finished areas].
All circuit conductors shall be identified within each enclosure where a
tap, splice or termination is made. Conductor identification shall be by
plastic coated self sticking printed markers or by heat-shrink type
sleeves. The markers shall be attached in a manner that will not permit
accidental detachment. Control circuit terminations shall be properly
identified. Wire devices so that their removal will activate system
trouble signals. Pigtail or "T" tap connections are prohibited. Wiring
for DC circuits shall not be permitted in the same conduit or tubing as
wiring for AC circuits. Paint all junction box covers red or provide them
with permanent labels reading "FIRE ALARM CIRCUIT." Electrical metallic
tubing shall not be installed in exterior or wet locations and shall not be
imbedded in masonry or concrete. Provide a written schedule of conductor
markings identifying each wire marker, the purpose, the origin, and
termination point of each conductor. The conductor wire marker schedule
shall be turned over to the Contracting Officer at the time of preliminary
testing with as built drawings.
[3.1.1
Additional Installation Requirements
**************************************************************************
NOTE: Include this paragraph in projects
administered by SOUTHNAVFACENGCOM.
**************************************************************************
Pull all conductors splice free. Make all conductor connections under
screw terminals. Provide insulated barrier type terminal strips at
junction points. Use of wire nuts, crimped connectors, or twisting of
conductors is prohibited. All control panels shall be dressed out in a
professional manner with all wires running in the vertical or horizontal
plane, cut to exact length, making all turns at 90 degree angles, and
SECTION 13852N
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