Kidde FX-64 - Panel Configuration Worksheet

Appendix B: Worksheets
196 P/N 3102352-EN • REV 005 • ISS 28DEC18
RZI16-2RS 24V IN riser maximum wire run
calculation
Use the APS/BPS notification appliance circuit calculation in the Remote Booster Power
Supply Manual (P/N 3100485-EN) to calculate maximum wire run distance for RZI16-2RS
NAC circuits.
RZI16-2RS 24V IN cable length
FX-64 AUX1 FX-1000 AUX1 APS/BPS
Maximum RZI16
-2RS alarm current
0.85
0.85 1
A
Load factor
× 0.20 0.24 0.59
Alarm current voltage drop
= 0.17 0.20 0.59 V
Source minimum voltage
20.40
20.40 19.10
V
Load voltage drop
− 0.17 0.20 0.59 V
Minimum
source output voltage =
20.23
20.20 18.51
V
RZI16
-2 minimum input voltage − 18.40 18.40 18.40 V
Voltage drop [1]
= 1.83 1.80 0.11 V
Total operating current
÷
0.85
0.85 1
A
Maximum wire resistance
= 2.15 2.21 0.11 Ω
Wire resistance (Ω/ft) [2]
÷
0.00198
0.00198 0.00198
Maximum single wire length
=
1, 087
1, 142 55
ft.
÷ 2 2 2
Maximum 2
-wire cable length[3] =
543
535 27.5
ft.
[1] This voltage drop is valid for regulated notification appliances only.
[2] For example, the value shown is typical resistance for 12 AWG 7-strand wire. Use the manufacturer’s
published wire resistance expressed in ohms per foot. For other typical values, see Table 48 on page 191.
[3] The value shown is for the FX-1000 panel. Maximum RZI16-2RS 24V IN riser cable distance length shown is
based on using 12 AWG, 7-strand conductor cable.