Journeyman Electrician’s Exam Journeyman Electrician's Low Voltage Systems 2

Question 1

NEC Article 760 covers the installation of wiring and equipment for which type of system?

Accepted Answer

Fire alarm systems

Answer

Article 760 specifically covers fire alarm systems, including both power-limited (PLFA) and non-power-limited (NPLFA) fire alarm circuits.

Question 2

What does the cable designation 'FPLP' indicate on a fire alarm cable?

Accepted Answer

Fire Power Limited Plenum

Answer

FPLP stands for Fire Power Limited Plenum, indicating the cable is listed for installation in air-handling spaces (plenums) per NEC Article 760.

Question 3

Non-power-limited fire alarm (NPLFA) circuits must be installed using wiring methods that comply with:

Accepted Answer

NEC Article 300 and applicable ampacity tables for power wiring

Answer

NPLFA circuits must follow Article 300 wiring methods since they are not power-limited and present shock and fire hazards similar to power circuits.

Question 4

Per NEC 760.49, what is the minimum conductor size for non-power-limited fire alarm (NPLFA) circuit conductors?

Accepted Answer

18 AWG copper

Answer

NEC 760.49 requires NPLFA circuit conductors to be no smaller than 18 AWG copper.

Question 5

Per NEC Article 760, what equipment requirement applies to all fire alarm system wiring and devices?

Accepted Answer

Equipment and wiring must be listed for fire alarm service

Answer

Per NEC 760.1 and 760.3, all equipment and wiring used in fire alarm systems must be listed for that specific fire alarm application.

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