Power Calculations
34
Autopulse-442R 50098:F 05/24/2001
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Select a battery with an equal or greater AH rating than the value obtained in Appendix A.2.
Batteries must be lead-acid type.
Notes:
1. Alarm AHs assumes a maximum system draw of 3 amps in alarm for 5 minutes (0.25 AH) or
for 10 minutes (0.5 AH).
2. NFPA 72 Central Station and Local and Proprietary Fire Alarm Systems require 24 hours of
standby.
3. NFPA 72 Auxiliary and Remote Station Fire Alarm Systems require 60 hours of standby.
4. Factory Mutual Systems require 90 hours of standby for releasing service.
5. The battery charger in this panel will charge a maximum of 18 AH of batteries within 48
hours (7 AH minimum). Batteries larger than 12 AH will require a UL-listed battery cabinet
(BB-17).
Standby Load
Current
[ ______ amps]
X
Required Standby Time in Hours
(typically 24, 60, or 90 hours)
[ ______ hours]
=
Enter 0.25 for 5 minutes in alarm or 0.5 for 10 minutes in alarm:
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Summary of Contents for AUTOPULSE 442R
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