FireWarden 100-2/E — P/N 52778:A 11/04/2005   27
Power Installation
2.3  Power
2.3.1  AC Power and Earth Ground Connection 
Primary power required for the FACP is 120 VAC, 60 Hz, 3.0 
amps  for the NFW2-100 or 240 VAC, 50 Hz, 1.5 amps for the 
NFW2-100E.  Overcurrent protection for this circuit must 
comply with Article 760 of the National Electrical Code (NEC) 
and/or local codes.  Use 14 AWG (2.00 mm
2
) or larger wire 
with 600 volt insulation rating.  Make certain that the AC 
mains circuit breaker is off
 before wiring any connections 
between the mains and the control panel.  Connect wiring from the AC mains to TB11 on the FACP, 
being careful to observe proper connections. 
Connect a wire from the grounding stud in the cabinet to a known solid earth ground in the 
building.  Refer to Figure 2.1 on page 23 for location of the stud.  This connection is vital for 
maintaining the control panel’s immunity to unwanted transients generated by lightning and 
electrostatic discharge.  Apply AC power to the panel only after the system is completely installed 
and visually checked.  Note that AC power must be applied to the panel before installing the battery 
interconnect cable (refer to the following section).
2.3.2  Battery Power
Before connecting the batteries to the FACP, make certain that 
the interconnect cable between the batteries is not
 connected.  
Do not connect the interconnect cable until the system is 
completely installed.  Observe polarity when connecting the 
batteries.  Connect the battery cable to J9 on the main circuit board.  Refer “Power Supply 
Calculations” on page 158, for calculation of the correct battery rating.
!
WARNING:
Several different sources of power can be connected to this panel.  Disconnect all sources of 
power before servicing.  The panel and associated equipment may be damaged by removing 
and/or inserting cards, modules or interconnecting cables while this unit is energized.
HOT NEUT   EARTH
-  +
BATTERY
LCD DISPLAY
TB11
J1
J4
J9
-
-
+
+
Interconnect 
Cable
!
WARNING:
Battery contains sulfuric acid which can cause severe burns to the skin and eyes and can 
destroy fabrics.  If contact is made with sulfuric acid, immediately flush the skin or eyes with 
water for 15 minutes and seek immediate medical attention.