Specifications

Draper Prison Wasatch & Oquirrh Intercom & Paging System Remodel 4-21-2014
PUBLIC ADDRESS SYSTEMS 275116 - 7
3.4 INSTALLATION
A. Match input and output impedances and signal levels at signal interfaces. Provide matching
networks where required.
B. Identification of Conductors and Cables: Color-code conductors and apply wire and cable
marking tape to designate wires and cables so they identify media in coordination with system
wiring diagrams.
C. Equipment Cabinet:
1. Install vent panels at top and bottom of equipment cabinets and between components
where possible for maximum ventilation. Locate amplifiers at top of cabinet. Locate
digital signal processors below amplifiers, separated by several vent panels.
1. Securely fasten in place equipment that is not rack mounted, including relays and other
small components. Do not use sticky-back tape.
2. Connect powered components to 120 VAC outlets on voltage suppressor power bars.
Do not connect to outlets on other components.
3. Identification:
a. Legibly identify user-operated system controls and system input / output jacks
using engraved, permanently attached laminated plastic plates or imprinted Lexan
labels. Label equipment and controls within equipment cabinets using similar
labels or printed labels from a label maker or laser printer.
b. Affix label to rack panel inside cabinet listing name and telephone number of
installer. Appropriate warranty instructions may be included
4. Fill all unused rack space with blank or vent panels.
5. Provide manufacture recommended power supplies for all specified equipment.
D. Volume Limiter/Compressor: Program each zone with a volume limiter/compressor. Install in
central equipment cabinet. Arrange to provide a constant input to power amplifiers.
E. Conductor Sizing: Unless otherwise indicated, size speaker circuit conductors from racks to
loudspeaker outlets not smaller than No. 18 AWG and conductors from microphone receptacles
to amplifiers not smaller than No. 22 AWG.
F. Weatherproof Equipment: For units that are mounted outdoors, in damp locations, or where
exposed to weather, install consistent with requirements of weatherproof rating.
3.5 GROUNDING
A. Ground cable shields and equipment to eliminate shock hazard and to minimize ground loops,
common-mode returns, noise pickup, cross talk, and other impairments.
B. Signal Ground Terminal: Locate at main equipment cabinet. Isolate from power system and
equipment grounding.
C. Install grounding electrodes as specified in Section 270526 "Grounding and Bonding for
Communications Systems."
3.6 FIELD QUALITY CONTROL
A. Tests and Inspections:
Bid DA14027DFCM
5/30/2014 2:08 PM p. 105