FREE Journeyman Electrician's NEC 2026 Questions and Answers

Question 1

A single conductor must be at least ____ AWG in size when utilized in power-limited fire alarm circuits.

Accepted Answer

18

Answer

According to NFPA 70, the National Electrical Code (NEC), specifically Article 760 for Fire Alarm Systems, conductors used in power-limited fire alarm circuits must be no smaller than 18 AWG. This minimum size ensures adequate mechanical strength and current-carrying capacity for the low-power signals essential in these critical safety systems.

Question 2

A supply-side bonding jumper of ____ AWG will be used for a service with 500 kcmil conductors on a 400 A service.

Accepted Answer

1/0

Answer

To determine the correct size for a supply-side bonding jumper, NEC Table 250.102(C)(1) is referenced. For a service with 500 kcmil conductors, the table specifies a minimum bonding jumper size of 1/0 AWG. This ensures that the bonding jumper can safely carry the fault current and maintain proper electrical continuity.

Question 3

The top and bottom of stairways must have listed wall-mounted control devices if there are ____ or more steps between each floor.

Accepted Answer

Six

Answer

NEC 210.70(A)(2)(c) mandates that listed wall-mounted control devices must be installed at both the top and bottom of stairways. This requirement applies when there are six or more risers (steps) between floor levels. This ensures convenient and safe control of lighting, preventing individuals from having to navigate steps in darkness to reach a switch.

Question 4

A maximum of _____' between supports is required for type MV cables to be supported.

Accepted Answer

6

Answer

According to NEC 328.30, Type MV (Medium Voltage) cables must be securely supported at intervals not exceeding 6 feet (1.8 m). This requirement is crucial for maintaining the structural integrity of the cable installation, preventing excessive sagging, and ensuring long-term reliability of the electrical system.

Question 5

With the exception of ____, all 120 V, single phase, 15 A, and 20 A branch circuits feeding outlets or devices installed in housing units must be AFCI protected.

Accepted Answer

Garages

Answer

NEC 210.12(A) requires Arc-Fault Circuit Interrupter (AFCI) protection for most 120-volt, single-phase, 15- and 20-ampere branch circuits supplying outlets or devices in dwelling units. However, garages are explicitly listed as one of the locations that are exempt from this AFCI protection requirement in dwelling units.

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Practice Test

FREE Journeyman Electrician's NEC 2026 Questions and Answers