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Section A.1: The 120VAC Fire Alarm Circuit
The control panel requires connection to a separate dedicated VAC fire alarm circuit, which must be labeled "FIRE
ALARM." This VAC circuit must connect to the line side of the main power feed of the protected premises. No
other equipment may be powered from the fire alarm circuit. The VAC circuit wire run 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 #12 AWG wire
with 600-volt insulation for this circuit.
D
e
v
c i
e
A
V
P
S
2 -
M
P
S
2 -
4
B
S
u
m
C
o
u l
Use Table A-1 to determine the total amount of current, in AC amps, that the AC service must be capable of
supplying to the system.
The power supply must be capable of powering the system under all operating conditions. Use Table A-2A to
determine power supply loading and verify that the loading is within the limits permitted. Use Table A-2B and A-
2C to determine secondary (battery) power requirements.
Appendix A:
Supply Calculations
#
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4
F
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C
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A
C
B
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h
C
Table A-1: 120 VAC Fire Alarm Circuit
Sensiscan 200 15032 Rev C1 11/1/96 P/N 15032:C1
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59
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