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.
Journeyman Electrician’s Exam Journeyman Electrician's NEC 2
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?