LIMITED ENERGY TECHNICIAN STATE
LICENSING EXAM QUESTION AND
CORRECT ANSWERS(VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
Question 1
Which system is typically classified as a limited energy system?
A. 480V three-phase motor circuit
B. Residential range circuit
C. Fire alarm system
D. Electric water heater
Correct Answer: C
Rationale: Fire alarm systems operate at low voltage and low current, fitting the
definition of limited energy systems.
Question 2
Limited energy systems generally operate at which voltage level?
A. Above 600V
B. Between 120V and 240V
C. At or below 50V
D. Exactly 277V
Correct Answer: C
Rationale: Limited energy systems are defined by low voltage, typically 50V or
less, reducing shock and fire risk.
,Question 3
Which code primarily governs limited energy installations in the United States?
A. OSHA regulations
B. National Electrical Code (NEC)
C. International Building Code
D. National Fire Code
Correct Answer: B
Rationale: The NEC provides specific articles covering limited energy and low-
voltage systems.
Question 4
Which NEC article covers fire alarm systems?
A. Article 725
B. Article 760
C. Article 800
D. Article 250
Correct Answer: B
Rationale: NEC Article 760 specifically addresses fire alarm systems.
Question 5
What is the main purpose of grounding limited energy systems?
A. Increase signal strength
B. Reduce installation cost
C. Protect against lightning and surges
D. Eliminate the need for insulation
Correct Answer: C
Rationale: Grounding protects equipment and occupants from surges, lightning,
and induced voltages.
Question 6
Which system is used to detect unauthorized entry?
A. Fire alarm system
,B. Access control system
C. Intrusion (burglar) alarm system
D. Nurse call system
Correct Answer: C
Rationale: Intrusion alarm systems are designed to detect unauthorized access.
Question 7
What type of cable is commonly used for data networks?
A. NM-B
B. MC
C. Cat 6
D. THHN
Correct Answer: C
Rationale: Category 6 cable is widely used for structured data cabling.
Question 8
Which limited energy system provides visual surveillance?
A. CCTV system
B. Paging system
C. Fire alarm system
D. Intercom system
Correct Answer: A
Rationale: Closed-circuit television (CCTV) systems provide video monitoring and
surveillance.
Question 9
What is Power over Ethernet (PoE)?
A. A grounding method
B. A way to transmit data only
C. A method of delivering power and data over Ethernet cable
D. A wireless power system
Correct Answer: C
, Rationale: PoE allows both power and data to be carried on the same Ethernet
cable.
Question 10
Which NEC article covers Class 2 and Class 3 circuits?
A. Article 725
B. Article 770
C. Article 800
D. Article 810
Correct Answer: A
Rationale: NEC Article 725 governs Class 1, Class 2, and Class 3 remote-control
and signaling circuits.
Question 11
Class 2 circuits are primarily limited by:
A. Conductor size
B. Overcurrent devices
C. Power supply output
D. Raceway type
Correct Answer: C
Rationale: Class 2 circuits are power-limited by the source, reducing fire risk.
Question 12
Which system allows voice communication between two points?
A. Intercom system
B. Fire alarm system
C. CCTV system
D. Access control system
Correct Answer: A
Rationale: Intercom systems are designed for two-way voice communication.
LICENSING EXAM QUESTION AND
CORRECT ANSWERS(VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
Question 1
Which system is typically classified as a limited energy system?
A. 480V three-phase motor circuit
B. Residential range circuit
C. Fire alarm system
D. Electric water heater
Correct Answer: C
Rationale: Fire alarm systems operate at low voltage and low current, fitting the
definition of limited energy systems.
Question 2
Limited energy systems generally operate at which voltage level?
A. Above 600V
B. Between 120V and 240V
C. At or below 50V
D. Exactly 277V
Correct Answer: C
Rationale: Limited energy systems are defined by low voltage, typically 50V or
less, reducing shock and fire risk.
,Question 3
Which code primarily governs limited energy installations in the United States?
A. OSHA regulations
B. National Electrical Code (NEC)
C. International Building Code
D. National Fire Code
Correct Answer: B
Rationale: The NEC provides specific articles covering limited energy and low-
voltage systems.
Question 4
Which NEC article covers fire alarm systems?
A. Article 725
B. Article 760
C. Article 800
D. Article 250
Correct Answer: B
Rationale: NEC Article 760 specifically addresses fire alarm systems.
Question 5
What is the main purpose of grounding limited energy systems?
A. Increase signal strength
B. Reduce installation cost
C. Protect against lightning and surges
D. Eliminate the need for insulation
Correct Answer: C
Rationale: Grounding protects equipment and occupants from surges, lightning,
and induced voltages.
Question 6
Which system is used to detect unauthorized entry?
A. Fire alarm system
,B. Access control system
C. Intrusion (burglar) alarm system
D. Nurse call system
Correct Answer: C
Rationale: Intrusion alarm systems are designed to detect unauthorized access.
Question 7
What type of cable is commonly used for data networks?
A. NM-B
B. MC
C. Cat 6
D. THHN
Correct Answer: C
Rationale: Category 6 cable is widely used for structured data cabling.
Question 8
Which limited energy system provides visual surveillance?
A. CCTV system
B. Paging system
C. Fire alarm system
D. Intercom system
Correct Answer: A
Rationale: Closed-circuit television (CCTV) systems provide video monitoring and
surveillance.
Question 9
What is Power over Ethernet (PoE)?
A. A grounding method
B. A way to transmit data only
C. A method of delivering power and data over Ethernet cable
D. A wireless power system
Correct Answer: C
, Rationale: PoE allows both power and data to be carried on the same Ethernet
cable.
Question 10
Which NEC article covers Class 2 and Class 3 circuits?
A. Article 725
B. Article 770
C. Article 800
D. Article 810
Correct Answer: A
Rationale: NEC Article 725 governs Class 1, Class 2, and Class 3 remote-control
and signaling circuits.
Question 11
Class 2 circuits are primarily limited by:
A. Conductor size
B. Overcurrent devices
C. Power supply output
D. Raceway type
Correct Answer: C
Rationale: Class 2 circuits are power-limited by the source, reducing fire risk.
Question 12
Which system allows voice communication between two points?
A. Intercom system
B. Fire alarm system
C. CCTV system
D. Access control system
Correct Answer: A
Rationale: Intercom systems are designed for two-way voice communication.
