conductor]. All wiring shall be color coded. Wiring, conduit and devices
exposed to weather, water or foam discharge shall be weatherproof. Wiring,
conduit and devices located in hazardous atmospheres, as defined by NFPA 70
[and as shown], shall be explosion proof. All conduit shall be minimum 20
mm 3/4 inch size.
2.6.2
Operating Power
Power shall be 120 volts AC service, transformed through a two winding
isolation type transformer and rectified to 24 volts DC for operation of
all signal initiating, signal sounding, trouble signal, and actuating
(releasing) circuits. Provide secondary DC power supply for operation of
system in the event of failure of the AC supply. Transfer from normal to
emergency power or restoration from emergency to normal power shall be
fully automatic and shall not cause transmission of a false alarm. Obtain
AC operating power for control panel, and battery charger from the line
side of the incoming building power source ahead of all building services.
Provide independent properly fused safety switch, with provisions for
locking the cover and operating handle in the "POWER ON" position for these
connections and locate adjacent to the main distribution panel. Paint
switch box red and suitably identify by a lettered designation.
2.6.3
Conductor Identification
Identify circuit conductors within each enclosure where a tap, splice or
termination is made. Identify conductors by plastic coated self sticking
printed markers or by heat-shrink type sleeves. Attach the markers in a
manner that will not permit accidental detachment. Properly identify
control circuit terminations.
2.7
SYSTEM ACTIVATION
2.7.1
Tank System Activation
**************************************************************************
NOTE: Depending on the tank size, more than one
riser may be required for each tank. Follow the
requirements specified in NFPA 11. Tank systems and
hose systems shall be served by separate mains.
**************************************************************************
Each zone shall encompass one tank. Upon activation of the tank system
manual release station(s), [or the detection system], all foam chambers
protecting that tank shall discharge foam.
[2.7.2
Monitor System Activation
**************************************************************************
NOTE: Where monitors are activated solely by
manually opening a value (e.g. post indicator
valve), delete this paragraph and show valves on
plans.
**************************************************************************
Each zone shall encompass the monitors indicated. Upon activation of a
monitor manual release station, all piping to monitors in that zone shall
be charged. Provide a manual release station at each monitor.
SECTION 13957N
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