Owner's manual

Model 5104B Installation Manual 151053-L8
3-8
3.5.2 Current Draw Worksheet
Use this worksheet to determine current requirements during alarm/battery standby operation.
Table 3-6: Current Draw Calculations
Device
Number of
Devices
Current per Device
Standby
Current
Alarm
Current
For each device use this
formula:
This Column
x This Column = Current per number of
devices
5104 1
Standby: 75 mA 75 mA
Alarm: 135 mA 135 mA
5230 3 max
Standby: 25 mA mA
Alarm: 40 mA mA
A Current Subtotals: mA mA
Smoke Detectors
Standby: mA mA
Alarm: mA mA
Standby: mA mA
Alarm: mA mA
Standby: mA mA
Alarm: mA mA
Standby: mA mA
Alarm: mA mA
Standby: mA mA
Alarm: mA mA
Standby: mA mA
Alarm: mA mA
B Current Subtotals: mA mA
Notification Appliances
mA
mA
mA
mA
mA
C Current Subtotals:
mA
D Total current rating of all devices in system (add totals of A-C) x .001: A A
E Number of standby hours. (24 or 60 for NFPA 72, chapter 1, 1-5.2.5): H
F Multiply lines D (standby current) and E. Total standby AH AH
G Alarm sounding period in hours. (For example, 5 minutes = .0833 hours) H
H Multiply lines D (alarm Current) and G totals Total alarm AH
AH
I Add lines F and H. AH = Ampere Hours Total AH required AH