combination (alarm and guard) has been evaluated and found 
suitable for that purpose.
3. INSTALLATION  INSTRUCTIONS
WIRING REQUIREMENTS
•  This smoke alarm should be installed on a U.L. listed or recognized 
junction box. All connections should be made by a qualified elec-
trician and all wiring used shall be in accordance with articles 210 
and 300.3(B) of the U.S. National Electrical Code ANSI/NFPA 70, 
NFPA 72 and/or any other codes having jurisdiction in your area. 
The multiple station interconnect wiring to the alarms must be run 
in the same raceway or cable as the AC power wiring.  In addition, 
the resistance of the interconnect wiring shall be a maximum  of 
10 ohms.
•  The appropriate power source is 120 Volt AC Single Phase sup-
plied from a non-switchable circuit which is not protected by a 
ground fault interrupter.
•  WARNING: This alarm cannot be operated from power derived 
from a square wave, modified square wave or modified sine wave 
inverters. These types of inverters are sometimes used to supply 
power to the structure in off grid installations, such as solar or 
wind derived power sources. These power sources produce high 
peak voltages that will damage the alarm.
WIRING INSTRUCTIONS FOR AC QUICK CONNECT HARNESS
CAUTION! TURN OFF THE MAIN POWER TO THE CIRCUIT 
BEFORE WIRING THE ALARM.
•  For alarms that are used as single station, DO NOT CONNECT THE 
RED WIRE TO ANYTHING. Leave the red wire insulating cap in 
place to make certain that the red wire cannot contact any metal 
parts or the electrical box.
•  When alarms are interconnected, all interconnected units must be 
powered from a single circuit.
•  A maximum of 24 Kidde devices may be interconnected in a mul-
tiple station arrangement.  The interconnect system should not 
exceed the NFPA interconnect limit of 12 smoke alarms and/or 18 
alarms total (smoke, heat, carbon monoxide, etc.). With 18 alarms 
interconnected, it is still possible to interconnect up to a total of 6 
remote signaling devices and/or relay modules.
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