3-13 
 
 
 
Figure 3-8.  NAC Field Wiring Connections 
 
For all UL Listed Notification Appliances, NACs are rated Regulated 24V dc, at 1.5A maximum 
each. Maximum allowed strobe load 1.35A.  The balance of the 3A total capacity for the two 
NACs can be auxiliary loads or audible notification appliances. 
 
 
All other regulated 24V dc synchronized notification appliances require the use of their associated 
Listed external synchronization module.  Notification Circuit rating is 1.5A maximum, 1.35A 
maximum strobe load.  Use the UL rated operating current to determine maximum number of 
appliances allowed per NAC. 
 
RAC1 RAC2
NAC1 +
NAC1 -
+
-
+
-
+
-
+
-
Class A Adapter
NAC1 NAC2
NAC2
+
-
+
-
NAC1
10K 1/2W
(431222)
RAC2
NAC1 +
NAC1 -
+
-
+
-
NAC2
+
-
+
-
NAC1
NAC2 +
NAC2 -
RAC1
Horn/
Strobe
Bell
10K 1/2W
(431222)
10K 1/2W
(431222)
10K 1/2W
(431222)
Wiring Notification Appliance Circuits, Continued 
Field Wiring 
Connections 
6
4
4 
5