Activation of fire dampers shall occur upon second zone detection, or upon
activation of Halon discharge by manual pull station. Fire dampers are
specified in Section 15810N DUCTWORK AND DUCTWORK ACCESSORIES. Provide
heaters for fusible links.
[2.12
ELECTROMAGNETIC DOOR HOLDER RELEASE
Provide where shown. The armature portion shall be mounted on the door and
shall have an adjusting screw for setting the angle of the contact plate.
The electro-magnetic release shall be wall mounted, with a total horizontal
projection not exceeding 100 mm 4 inches. All doors shall release to close
upon first stage (pre-discharge) alarm. Electrical supervision of wiring
external of control panel for magnetic door holding circuits is not
required.
]2.13
ELECTRICAL WORK
[Electrical work is specified in Section 16402 INTERIOR DISTRIBUTION
SYSTEM, except for control and fire alarm wiring.]
2.13.1
Wiring
Control and fire alarm wiring, including connections to fire alarm systems,
shall be provided under this section and shall conform to NFPA 70. Wiring
for 120 volt circuits shall be No. 12 AWG minimum. Wiring for low voltage
DC circuits shall be No. [14] [16] AWG minimum. All wiring shall be color
coded. Use rigid metal conduit or intermediate metal conduit, except
electrical metallic tubing may be used in dry locations not enclosed in
concrete and where not subject to mechanical damage.
2.13.2
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 [master box]
[transmitter] tripping 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 to 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.
2.13.3
Conductor Identification
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. Attach the markers in a manner that will not permit accidental
detachment. Properly identify control circuit terminations.
SECTION 13966N
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