2.13.2
Remote Loudspeaker ON/OFF Switches
**************************************************************************
NOTE: If more than one switch is required, indicate
in a schedule on the drawing.
**************************************************************************
Remote switches shall be [key-operated] [toggle switch] 2-pole,
wall-mounted, single gang type with engraved switch plates finished to
match the approved finish of electrical wall switches. Low-voltage
priority override relays shall be provided as part of the switches with all
wiring to the racks to allow override of the ON/OFF switches for priority
announcements.
2.13.3
Remote Loudspeaker Volume Controls
**************************************************************************
NOTE: If more than one control is required,
indicate in a schedule on the drawing.
**************************************************************************
Remote volume controls shall be an auto transformer type with detented 3 dB
steps and an OFF position. The controls shall be wall-mounted in
single-gang outlet boxes and furnished with engraved switching plates
finished to match approved finish of electrical wall switches. Insertion
loss of the controls shall not exceed 0.6 dB and the power-handling
capacities of the control shall be [10] [35] [75] [_____] watts.
Low-voltage priority override relays shall be furnished as part of these
controls with all wiring to the racks to allow override of the volume
controls for priority announcements.
2.14
EQUIPMENT RACKS
**************************************************************************
NOTE: For low powered systems i.e. only paging
systems,specify perforations or louvers for cooling
through convection currents. Systems that are
continiously powered i.e. music or radio broadcast
and total amplifier capacity exceeding 400 watts use
top rack mounted fan option.
**************************************************************************
Equipment shall be mounted on 482.6 mm 19 inch racks in accordance with EIA
ANSI/EIA-310-D and located as shown on drawings. Ventilated rear panels,
solid side panels, and solid top panels shall be provided. Equipment racks
shall be provided with lockable front panels that limit access to
equipment. The lockable front shall not cover items that require operator
access such as am/fm tuner, CD player, or tape player. Rack cooling shall
be through [perforations or louvers in front panels to ensure adequate
ventilation of equipment] [top rack mounted fan]. The racks and panels
shall be factory finished with a uniform baked enamel over rust inhibiting
primer.
2.15
CABLES
2.15.1
Speaker Cable
Cables shall be of the gauge required depending upon the cable run length.
In no case shall cable be used which is smaller than 18 AWG. Insulation on
SECTION 16770
Page 15
Previous Page
