NEVADA C-2D LOW VOLTAGE CERTIFICATION
EXAM SCRIPT 2026 COMPREHENSIVE STUDY
GUIDE WITH SOLVED Q&A
◉ The physical size of the current carrying wire of the conductor
Answer: (AWG) American Wire Gauge
◉ Low Voltage cable typically contains conductors with solid wire
sizes ranging from Answer: 26 - 12 AWG.
◉ At higher data transfer frequencies, stranding can cause up to
________ more signal attenuation. Answer: 20%
◉ Stranded wire of the same gauge as solid wire is Answer: larger in
diameter
◉ The standard material used for current carrying wire of
conductors in Low-Voltage cable is Answer: annealed (soft) solid
copper.
◉ The downside to copper-clad steel and copper alloys Answer:
They have inferior current-carrying ability.
,◉ The most common material used for conductor insulation and
cable jackets Answer: PVC
◉ Primarily used as cable jacketing material Answer: Nylon
◉ A high-temperature insulation that is widely used for
communication wiring in plenum-rated cable Answer: Teflon
◉ These are typically used for outdoor cabling Answer: Rubber
◉ The NEC requires that low-voltage and optical fiber cables used
for installation be Answer: listed and marked with an appropriate
classification code.
◉ NEC Article 725 Answer: Remote Control, Signaling, and Power-
Limited Circuits (Class 1, 2, and 3 Circuits)
◉ NEC Article 727 Answer: Instrumentation Tray Cable
◉ NEC Article 760 Answer: Fire Alarm Systems
◉ NEC Article 770 Answer: Optical Fiber Cables and Raceways
, ◉ NEC Article 780 Answer: Closed Loop and Programmed Power
Distribution
◉ NEC Article 800 Answer: Communications Circuits
◉ NEC Article 820 Answer: Community Antenna Television and
Radio Distribution Systems
◉ NEC Article 830 Answer: Network-Powered Broadband
Communications Systems
◉ Most communications cables have outer jackets that are Answer:
color-coded
◉ The most widely used cable for data and voice Answer: (UTP)
Unshielded twisted pair
◉ Conductors in UTP range from sizes Answer: 24-22 AWG
◉ In UTP cables larger than 600 pairs what is used to encase the
conductors? Answer: Aluminum-steel shield
◉ Each pair of UTP conductors has a nominal impedance of Answer:
100 Ohms
EXAM SCRIPT 2026 COMPREHENSIVE STUDY
GUIDE WITH SOLVED Q&A
◉ The physical size of the current carrying wire of the conductor
Answer: (AWG) American Wire Gauge
◉ Low Voltage cable typically contains conductors with solid wire
sizes ranging from Answer: 26 - 12 AWG.
◉ At higher data transfer frequencies, stranding can cause up to
________ more signal attenuation. Answer: 20%
◉ Stranded wire of the same gauge as solid wire is Answer: larger in
diameter
◉ The standard material used for current carrying wire of
conductors in Low-Voltage cable is Answer: annealed (soft) solid
copper.
◉ The downside to copper-clad steel and copper alloys Answer:
They have inferior current-carrying ability.
,◉ The most common material used for conductor insulation and
cable jackets Answer: PVC
◉ Primarily used as cable jacketing material Answer: Nylon
◉ A high-temperature insulation that is widely used for
communication wiring in plenum-rated cable Answer: Teflon
◉ These are typically used for outdoor cabling Answer: Rubber
◉ The NEC requires that low-voltage and optical fiber cables used
for installation be Answer: listed and marked with an appropriate
classification code.
◉ NEC Article 725 Answer: Remote Control, Signaling, and Power-
Limited Circuits (Class 1, 2, and 3 Circuits)
◉ NEC Article 727 Answer: Instrumentation Tray Cable
◉ NEC Article 760 Answer: Fire Alarm Systems
◉ NEC Article 770 Answer: Optical Fiber Cables and Raceways
, ◉ NEC Article 780 Answer: Closed Loop and Programmed Power
Distribution
◉ NEC Article 800 Answer: Communications Circuits
◉ NEC Article 820 Answer: Community Antenna Television and
Radio Distribution Systems
◉ NEC Article 830 Answer: Network-Powered Broadband
Communications Systems
◉ Most communications cables have outer jackets that are Answer:
color-coded
◉ The most widely used cable for data and voice Answer: (UTP)
Unshielded twisted pair
◉ Conductors in UTP range from sizes Answer: 24-22 AWG
◉ In UTP cables larger than 600 pairs what is used to encase the
conductors? Answer: Aluminum-steel shield
◉ Each pair of UTP conductors has a nominal impedance of Answer:
100 Ohms
