Kidde 20SA10-V User Manual page 16

• A maximum of 24 Kidde Safety devices may be interconnected in a multiple station arrangement.
The interconnect system should not exceed the NFPA interconnect limit of 12 smoke alarms and/or
18 alarms total (smoke, CO, Smoke/ CO Combination, heat, etc.). With 18 alarms interconnected, it is
still possible to interconnect up to a total of 6 remote signaling devices and/or relay modules.
FUSE OR CIRCUIT BREAKER
L
N
BLACK
RED
First
Alarm
Wires on alarm harness: Connected to:
• Figure 9-D illustrates interconnection wiring. Improper connection will result in damage to the alarm,
failure to operate, or a shock hazard.
• Make certain alarms are wired to a continuous (non-switched) power line.
NOTE: Use standard UL Listed household wire (as required by local codes) available at all electrical
supply stores and most hardware stores.
NOTE: AC power should be turned off at this stage.
• For best results to minimize nuisance alarms, interconnected alarms should be on a dedicated line.
If not on a dedicated line, it is suggested that the smoke alarms share a lighting load circuit that
does not have a dimmer associated with it. If receptacles must be placed on the same line it is
suggested that they be placed ahead of the smoke alarms (see Figure 9-E). This will prevent large
voltage drops from occurring between the first and last alarm in the circuit.
16
BLACK
WHITE
RED
Additional
Alarm
Black: Hot side of AC line
White: Neutral side of AC line
Red: Interconnect lines (red wires) of other
units in the multiple station set-up
Figure 9-D, Interconnect Wiring Diagram
WHITE
Kidde Relay Module
SM120X, CO120X
or both
Optional
Accessory
Additional
Alarm
Service
BLACK
RED
Wiring practice that has had good results
Panel
in preventing nuisance alarms
Receptacles Interconnected alarms
Figure 9-E
WHITE