control panel.
2.1.2.4
Auxiliary Relays
General purpose glass enclosed socket type with 24 V ac control coil and
with industry standard pin arrangement. Relays shall be rated for
continuous duty. Operating voltage range shall be within plus or minus 10
percent of nominal voltage. Contact arrangement shall be two pole double
throw with contacts rated at not less than five amperes.
2.1.2.5
Silencing Switch
Low voltage, square, nonilluminated single pole, normally open, momentary
contact pushbutton with silver contacts rated for two amperes at 24 V dc
resistive with 25,000 cycles minimum electrical/mechanical life. Bezel
shall be black, full shroud type. Cap or button shall be blue.
2.1.2.6
Power Supply
Provide 24 V dc power supply to the duress signal system. Output shall be
not less than one and one half times the sum of the load of all the relays
on the watchtour system. Provide glass cartridge fuse rated at 125 percent
of full load. Power supply shall be UL listed. Power supply shall be
served from 120 V ac 60 Hz circuit from the Emergency Power System.
2.1.2.7
Audible Signal
Low voltage 24 V dc buzzer for flush mounting in single gang outlet box
under single gang standard toggle switch device plate.
2.2
WIRE AND RACEWAYS
Conform to UL 6 and UL 797.
Cabinets and boxes shall conform to UL 50.
PART 3
EXECUTION
3.1
INSTALLATION
3.1.1
Power Wiring
Provide power wiring, raceway and outlet boxes for intercommunication
system in accordance with Section 16402 INTERIOR DISTRIBUTION SYSTEM.
3.1.2
Control Circuit Wiring
Provide control circuits in accordance with NFPA 70. Wire and number of
conductors as recommended by the duress system manufacturer.
3.1.3
Wiring
No. 16 AWG, stranded, Type MTW installed in concealed conduit.
Connections
to terminal blocks shall be made with crimp type lugs.
3.1.4
Back Boxes
Provide back boxes having characteristics suitable for switches mounted in
them.
SECTION 13798
Page 7
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