Appendix A: Power Supply Calculations; A.1: The Ac Branch Circuit - Fire-Lite MS-9200(C) Instruction Manual

Power Supply Calculations
Appendix A
A.1 The AC Branch Circuit
The MS-9200 requires connection to a separate dedicated 120 VAC branch circuit, which must be labeled Fire Alarm.
The branch circuit must connect to the line side of the main power feed of the protected premises. No other equip-
ment may be powered from the fire alarm branch circuit. The branch circuit wire must run continuously, without any
disconnect devices, from the power source to the fire alarm control panel. Overcurrent protection for this circuit must
comply with Article 760 of the National Electrical Code as well as local codes. Use #14 AWG (2.00 mm
600 volt insulation for this branch circuit.
Use Table A-1 to determine the total amount of current, in AC amps, that must be supplied to the fire alarm system.
AC Branch Circuit Requirements @ 120VAC
TABLE A-1:
Unit Type
MS-9200(C)
or
MS-9200E
CHG-120F Charger
Total AC Branch Current Required
Power Supply Calculations
Number of
Units
1 X
[ ] X
Document #51003
Current Draw
(amps)
2.3
or
1.2
2.0
Rev.E 01/11/02 P/N 51003:E
2
) wire with
Total Current
per Device
=
=
= amps
61