Connecticut (CT) L-5 Limited Electrical
Contractor (Low Voltage) Practice Exam
Questions And Correct Answers |100%
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1. According to Connecticut regulations, what is the maximum voltage and
amperage allowed for an L-5 Limited Electrical Contractor?
A) 120 volts, 15 amperes
B) 50 volts, 10 amperes
C) 25 volts, five amperes
D) 30 volts, 10 amperes
Correct Answer: C
Explanation: Connecticut regulations specifically limit the L-5 license scope to systems
not exceeding 25 volts or five amperes . While 50 volts is often a threshold for low-
voltage in the NEC, the Connecticut state regulations for the L-5 license explicitly set the
maximum at 25 volts and five amperes .
2. The holder of an L-5 license may perform work limited to:
A) Any electrical installation up to 600 volts.
B) Low voltage, alarm or signal work, audio and sound systems.
C) Residential electrical work only.
D) Telecommunications installations without restriction.
,Correct Answer: B
Explanation: The scope of work for an L-5 license is defined as "low voltage, alarm or
signal work, audio and sound systems."
3. Under Connecticut law, which of the following is explicitly NOT considered
'electrical work' subject to licensing for an L-5 contractor?
A) Installing a doorbell.
B) Installing a security camera.
C) Low-voltage wiring not exceeding 24 volts used within a lawn sprinkler system.
D) Terminating network cables.
Correct Answer: C
Explanation: Connecticut law excludes low-voltage wiring not exceeding 24 volts used
within a lawn sprinkler system from the definition of electrical work subject to licensing .
4. What is the primary purpose of the "Class 2" circuit designation in the NEC?
A) To indicate high-power circuits.
B) To define limited power sources that pose reduced fire and shock risk.
C) To label circuits over 600 volts.
D) To specify circuits that require a dedicated ground rod.
Correct Answer: B
Explanation: Class 2 circuits are defined by their limited power output, which inherently
presents a lower risk of fire and electric shock, allowing for more flexible wiring
methods .
,5. What type of cable is required for in-wall installation of a Class 2 security
system circuit?
A) SJT cord.
B) CL2 or CL2P rated cable.
C) UF cable.
D) Any lamp cord.
Correct Answer: B
Explanation: NEC Article 725 mandates that cables for Class 2 circuits be listed for their
specific application. CL2 (Class 2) or CL2P (Plenum) are standard ratings approved for in-
wall installations .
6. A "plenum" rated cable (CMP/CL2P) is required when installing cable in:
A) Any concealed space.
B) An air-handling space used for environmental air.
C) A concrete floor slab.
D) Outdoor conduits.
Correct Answer: B
Explanation: Plenum-rated cable is required by NEC 300.22(C) when installed in ducts,
plenums, or other air-handling spaces to limit the spread of smoke and fire .
7. What is the maximum allowable horizontal cable run from the
telecommunications outlet to the patch panel in a structured cabling system per
TIA/EIA standards?
A) 50 meters (164 feet).
B) 90 meters (295 feet).
, C) 100 meters (328 feet).
D) 150 meters (492 feet).
Correct Answer: B
Explanation: The TIA/EIA-568 standard allows a maximum of 90 meters for the
permanent horizontal cable installation, plus up to 10 meters for patch cords, for a total
channel length of 100 meters .
8. When terminating twisted-pair cables, untwisting the pairs more than ______ can
cause increased crosstalk.
A) 1/2 inch (13 mm).
B) 1 inch (25 mm).
C) 3 inches (75 mm).
D) 6 inches (150 mm).
Correct Answer: A
Explanation: Industry standards recommend untwisting no more than 1/2 inch to
maintain the cable's inherent noise cancellation properties and prevent crosstalk .
9. What does "PoE" stand for in network installations?
A) Power over Ethernet.
B) Point of Entry.
C) Polyethylene Overcoat.
D) Polarity of Energy.
Correct Answer: A
Explanation: Power over Ethernet (PoE) delivers DC power over the same twisted-pair
Contractor (Low Voltage) Practice Exam
Questions And Correct Answers |100%
Verified |Guaranteed Success | update
1. According to Connecticut regulations, what is the maximum voltage and
amperage allowed for an L-5 Limited Electrical Contractor?
A) 120 volts, 15 amperes
B) 50 volts, 10 amperes
C) 25 volts, five amperes
D) 30 volts, 10 amperes
Correct Answer: C
Explanation: Connecticut regulations specifically limit the L-5 license scope to systems
not exceeding 25 volts or five amperes . While 50 volts is often a threshold for low-
voltage in the NEC, the Connecticut state regulations for the L-5 license explicitly set the
maximum at 25 volts and five amperes .
2. The holder of an L-5 license may perform work limited to:
A) Any electrical installation up to 600 volts.
B) Low voltage, alarm or signal work, audio and sound systems.
C) Residential electrical work only.
D) Telecommunications installations without restriction.
,Correct Answer: B
Explanation: The scope of work for an L-5 license is defined as "low voltage, alarm or
signal work, audio and sound systems."
3. Under Connecticut law, which of the following is explicitly NOT considered
'electrical work' subject to licensing for an L-5 contractor?
A) Installing a doorbell.
B) Installing a security camera.
C) Low-voltage wiring not exceeding 24 volts used within a lawn sprinkler system.
D) Terminating network cables.
Correct Answer: C
Explanation: Connecticut law excludes low-voltage wiring not exceeding 24 volts used
within a lawn sprinkler system from the definition of electrical work subject to licensing .
4. What is the primary purpose of the "Class 2" circuit designation in the NEC?
A) To indicate high-power circuits.
B) To define limited power sources that pose reduced fire and shock risk.
C) To label circuits over 600 volts.
D) To specify circuits that require a dedicated ground rod.
Correct Answer: B
Explanation: Class 2 circuits are defined by their limited power output, which inherently
presents a lower risk of fire and electric shock, allowing for more flexible wiring
methods .
,5. What type of cable is required for in-wall installation of a Class 2 security
system circuit?
A) SJT cord.
B) CL2 or CL2P rated cable.
C) UF cable.
D) Any lamp cord.
Correct Answer: B
Explanation: NEC Article 725 mandates that cables for Class 2 circuits be listed for their
specific application. CL2 (Class 2) or CL2P (Plenum) are standard ratings approved for in-
wall installations .
6. A "plenum" rated cable (CMP/CL2P) is required when installing cable in:
A) Any concealed space.
B) An air-handling space used for environmental air.
C) A concrete floor slab.
D) Outdoor conduits.
Correct Answer: B
Explanation: Plenum-rated cable is required by NEC 300.22(C) when installed in ducts,
plenums, or other air-handling spaces to limit the spread of smoke and fire .
7. What is the maximum allowable horizontal cable run from the
telecommunications outlet to the patch panel in a structured cabling system per
TIA/EIA standards?
A) 50 meters (164 feet).
B) 90 meters (295 feet).
, C) 100 meters (328 feet).
D) 150 meters (492 feet).
Correct Answer: B
Explanation: The TIA/EIA-568 standard allows a maximum of 90 meters for the
permanent horizontal cable installation, plus up to 10 meters for patch cords, for a total
channel length of 100 meters .
8. When terminating twisted-pair cables, untwisting the pairs more than ______ can
cause increased crosstalk.
A) 1/2 inch (13 mm).
B) 1 inch (25 mm).
C) 3 inches (75 mm).
D) 6 inches (150 mm).
Correct Answer: A
Explanation: Industry standards recommend untwisting no more than 1/2 inch to
maintain the cable's inherent noise cancellation properties and prevent crosstalk .
9. What does "PoE" stand for in network installations?
A) Power over Ethernet.
B) Point of Entry.
C) Polyethylene Overcoat.
D) Polarity of Energy.
Correct Answer: A
Explanation: Power over Ethernet (PoE) delivers DC power over the same twisted-pair
