PV system components, rapid shutdown, fire alarm, low-voltage and Class 2 circuits.
34 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the primary function of a photovoltaic inverter?
Show answer
To convert DC power from the array to AC power for use or grid export- What does a combiner box do in a PV system?
Show answer
Combines multiple PV strings and includes overcurrent protection and disconnect means- Where must the DC disconnect switch be located in a PV system?
Show answer
Between the PV array and the inverter, readily accessible- Where must the AC disconnect switch be located?
Show answer
Between the inverter and the AC load or grid connection, readily accessible- What are common types of energy storage used in PV systems?
Show answer
Lithium-ion, lead-acid, and flow batteries- What is the primary function of a charge controller?
Show answer
To regulate voltage and current from the PV array to prevent battery overcharging- What grounding method is required for PV array mounting structures?
Show answer
All metal frames and mounting structures must be bonded and grounded- What is a rapid shutdown device in PV systems?
Show answer
A device that de-energizes DC conductors of a PV array in 10 seconds or less- Where are rapid shutdown switches required to be located?
Show answer
At the main service entrance and on the roof near the PV array- How is the roof-mounted rapid shutdown switch activated?
Show answer
By a wireless or hardwired signal from the main switch at the service entrance- What is the maximum time allowed for rapid shutdown activation?
Show answer
10 seconds from switch activation to de-energization of PV array conductors- What labeling is required for a rapid shutdown switch?
Show answer
A permanent label identifying it as a PV rapid shutdown switch in a visible location- What is the definition of a fire alarm circuit?
Show answer
A circuit that powers smoke detectors, heat detectors, alarm devices, and notification appliances- What types of wiring are permitted for fire alarm circuits?
Show answer
Nonmetallic sheathed cable, armored cable, or approved wire in conduit- What power source arrangement must fire alarm circuits have?
Show answer
A dedicated source with battery backup or connection to the main service panel with standby power
FlashKeepers