Design Notification Appliance Circuits per NFPA 72 with voltage drop and current calculations.
Input Parameters
Results
--
Total Circuit Current
A
--
Voltage Drop
V
--
Voltage Drop
%
--
EOL Voltage
VDC
Note: NFPA 72 requires that notification appliances receive at least the minimum listed operating voltage (typically 16V for 24V systems). Keep voltage drop under 10% as best practice.
Reference
Vdrop = 2 x L x I x R_per_ft
EOL Voltage = Supply Voltage - Vdrop
Vdrop % = (Vdrop / Vs) x 100
NFPA 72: Min appliance voltage typically 16 VDC for 24V nominal systems
Wire R (ohms/1000ft): 18AWG=6.385, 16AWG=4.016, 14AWG=2.525, 12AWG=1.588