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Electrical
ESA Alarm Technician Certification
Notification Appliances & Circuits
Knowledge Check
Notification Appliances & Circuits
Knowledge Check
Knowledge Check
1 / 10
During the supervisory state, what polarity does the FACP apply to a NAC?
A
Reverse polarity so devices block current flow
B
Forward polarity to keep devices in standby mode
C
Alternating polarity cycling at 1 Hz
D
Zero voltage with periodic polling pulses
Check Answer
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