Journeyman Electrician Licensing Exam

Journeyman Electrician Licensing Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the maximum allowable voltage drop for branch circuits

according to the NEC?

• 1%
• 2%
• 3%
• 5%

Rationale: The NEC recommends a maximum voltage drop of 3% for branch

circuits to ensure efficiency and proper operation of electrical equipment.

• Which conductor color is typically used for grounding in residential

wiring?

• Red
• Blue
• Green 1 / 4

• White

Rationale: Green or bare copper is used for grounding conductors to ensure

safety and prevent shock hazards.

• The NEC requires a minimum of how many feet of working space in front

of electrical panels?

• 2 feet
• 3 feet
• 4 feet
• 6 feet

Rationale: NEC 110.26 mandates at least 6 feet of clear working space in

front of panels for safe access.

• What type of conduit is required for wet locations?

A. EMT

B. PVC

C. RMC

D. FMC

Rationale: PVC conduit is non-metallic and suitable for wet locations as it

resists corrosion and moisture.

• What is the standard residential voltage for a single-phase system in the

U.S.?

A. 110V

B. 120/240V

C. 208V 2 / 4

D. 277V

Rationale: Standard single-phase residential service in the U.S. is 120/240

volts.

• What is the purpose of a GFCI (Ground Fault Circuit Interrupter)?
• To prevent overloads
• To prevent short circuits
• To protect against ground faults/shock hazards
• To increase voltage

Rationale: GFCIs detect current leaks to ground and quickly disconnect

power to prevent shock.

• Which NEC article covers wiring methods?
• Article 210
• Article 300
• Article 430
• Article 250

Rationale: NEC Article 300 specifies wiring methods, including conduit,

cable types, and installation rules.

• What is the ampacity of a 12 AWG copper conductor in a typical

residential setting?

A. 10A

B. 20A

C. 30A

D. 25A 3 / 4

Rationale: 12 AWG copper conductors are rated for 20 amps under normal

residential conditions per NEC Table 310.15(B)(16).

• Which type of overcurrent protection device is used to protect branch

circuits?

• Fuse
• Circuit breaker
• Transformer
• Disconnect switch

Rationale: Circuit breakers are standard for protecting branch circuits from

overloads and short circuits.

• What is the primary purpose of a neutral wire?
• To carry current to equipment
• To complete the circuit back to the source
• To provide grounding
• To carry only fault current

Rationale: The neutral wire provides a return path for current to complete

the electrical circuit.

• What is the NEC minimum cover for underground PVC conduit in a

residential driveway?

• 6 inches
• 12 inches
• 18 inches
• 24 inches
• / 4