Journeyman Electrician’s Exam Journeyman Electrician's NEC 2 — Questions and Answers
Question 1: According to NEC Article 210, what is the minimum number of 20-ampere small appliance branch circuits required for a dwelling unit's kitchen and dining areas?
- One 20A circuit
- Two 20A circuits (Correct answer)
- Three 20A circuits
- Four 20A circuits
Correct answer: Two 20A circuits
NEC 210.11(C)(1) requires at least two 20-ampere small appliance branch circuits to serve receptacles in the kitchen, pantry, breakfast room, and dining room.
Question 2: Under NEC Article 230, service entrance conductors installed as service lateral must be protected from damage. What is the minimum burial depth for a service lateral installed in a residential driveway without conduit?
- 12 inches
- 18 inches
- 24 inches (Correct answer)
- 36 inches
Correct answer: 24 inches
NEC Table 300.5 requires 24 inches of burial depth for direct-buried conductors under driveways for one- and two-family dwellings.
Question 3: NEC 300.14 specifies the minimum length of free conductor that must be left at each outlet box. What is that minimum length?
- 4 inches
- 6 inches (Correct answer)
- 8 inches
- 12 inches
Correct answer: 6 inches
NEC 300.14 requires at least 6 inches of free conductor measured from where it emerges from the raceway or cable sheath at the outlet box.
Question 4: According to NEC 408.4, switchboards and panelboards must have each circuit and circuit modification marked to indicate its purpose. This marking must be:
- Painted on the enclosure exterior
- On a legible directory inside the panel door (Correct answer)
- Stamped on the circuit breaker
- Written in permanent marker on the wires
Correct answer: On a legible directory inside the panel door
NEC 408.4(A) requires a legible directory of circuits to be posted inside the panelboard door or enclosure.
Question 5: Per NEC 250.122, if a 200-ampere circuit breaker protects a feeder, what is the minimum size equipment grounding conductor required for copper conductors?
- #8 AWG copper
- #6 AWG copper
- #4 AWG copper (Correct answer)
- #2 AWG copper
Correct answer: #4 AWG copper
Per NEC Table 250.122, a 200-ampere overcurrent device requires a minimum #4 AWG copper equipment grounding conductor.
Question 6: NEC Article 310 governs conductors for general wiring. What is the maximum temperature rating for THWN-2 conductors used in wet locations?
- 60°C
- 75°C
- 90°C (Correct answer)
- 105°C
Correct answer: 90°C
THWN-2 conductors are rated 90°C for both wet and dry locations, with the '-2' designation indicating the higher wet location rating.
Question 7: According to NEC 210.52(E), what receptacle outlet placement is required for hallways in dwelling units that are 10 feet or more in length?
- One receptacle at each end of the hallway
- At least one receptacle outlet (Correct answer)
- One receptacle for every 12 feet
- No receptacles are required in hallways
Correct answer: At least one receptacle outlet
NEC 210.52(H) requires at least one receptacle outlet in hallways of dwelling units that are 10 feet or more in length.
