Grounding & Bonding

01What is the minimum size equipment grounding conductor (EGC) required for a circuit protected by a 60-ampere overcurrent device?+

Answer: #10 AWG copper or #8 AWG aluminum

NEC Table 250.122

02What is the minimum size grounding electrode conductor (GEC) for a service with 2/0 AWG copper service-entrance conductors?+

Answer: #4 AWG copper

NEC Table 250.66

03When two ground rods are used, what is the minimum separation distance required between them?+

Answer: 6 feet minimum

NEC 250.53(B)

Overcurrent Protection

04What is the maximum standard overcurrent protective device size for #14 AWG copper conductors?+

Answer: 15 amperes

NEC 240.4(D)

05Where conductors are supplied from a transformer, overcurrent protection must be provided on which side?+

Answer: The secondary side, unless primary protection meets the requirements of NEC 240.21

NEC 240.21(C)

06A 40-ampere fixed appliance circuit uses #8 AWG copper. The next standard size overcurrent device is permitted when the conductor ampacity doesn't match a standard device rating. What are the standard OCPD ratings?+

Answer: 15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 110, 125 (and continuing per 240.6(A))

NEC 240.6(A)

Conductor Sizing & Ampacity

07What is the ampacity of #6 AWG THWN copper in a raceway at 30°C ambient temperature?+

Answer: 65 amperes

NEC Table 310.16 (75°C column)

08When more than 3 current-carrying conductors are in a raceway, what adjustment factor applies for 4-6 conductors?+

Answer: 80% of the conductor's ampacity

NEC Table 310.15(C)(1)

09The neutral conductor of a 3-wire, single-phase system carrying only unbalanced current is counted as a current-carrying conductor for derating purposes. True or false?+

Answer: False — the neutral is not counted as a current-carrying conductor in this scenario

NEC 310.15(E)

Box Fill

10When calculating box fill, a single device (switch or receptacle) on a yoke counts as how many conductor volumes?+

Answer: 2 conductor volumes (based on the largest conductor connected to it)

NEC 314.16(B)(4)

11All equipment grounding conductors in a box together count as how many conductor volumes?+

Answer: 1 conductor volume total (based on the largest EGC present), regardless of how many there are

NEC 314.16(B)(5)

Branch Circuits & Receptacles

12In a dwelling unit, what is the maximum spacing allowed between receptacle outlets along a wall?+

Answer: 12 feet (no point along the floor line can be more than 6 feet from a receptacle outlet)

NEC 210.52(A)(1)

13How many 20-ampere small appliance branch circuits are required in a dwelling unit kitchen?+

Answer: A minimum of two 20A small appliance branch circuits

NEC 210.11(C)(1)

14GFCI protection is required for all 125V, 15A and 20A receptacles in dwelling unit bathrooms. True or false?+

Answer: True

NEC 210.8(A)(1)

Motors

15Branch circuit conductors for a single continuous-duty motor must have an ampacity of not less than what percentage of the motor full-load current?+

Answer: 125% of the motor full-load current

NEC 430.22(A)

16For motor full-load current values used in determining conductor sizes and overcurrent protection, which table in the NEC should you use rather than the motor nameplate?+

Answer: NEC Tables 430.247 through 430.250 (use the table, not the nameplate, for conductor sizing and OCPD)

NEC 430.6(A)(1)

Services & Panels

17What is the minimum required working space depth in front of a 120/240V panelboard?+

Answer: 36 inches (Condition 1, 0-150V to ground = 36")

NEC Table 110.26(A)(1)

18A dwelling unit is required to have an emergency disconnect installed in a readily accessible outdoor location. Which NEC article covers this?+

Answer: NEC 230.85

NEC 230.85 — Emergency disconnects for one- and two-family dwellings

Raceways & Wiring Methods

19What is the maximum conduit fill percentage when pulling 3 or more conductors in a raceway?+

Answer: 40%

NEC Chapter 9, Table 1

20What is the maximum number of degrees in bends permitted between pull points in a raceway?+

Answer: 360 degrees total (four quarter bends or equivalent)

NEC 344.26 (RMC), 358.26 (EMT), and similar articles per raceway type

How to Use These Questions

Run through all 20 questions without looking at the answers first. Write down your answers and the NEC section you'd reference. Then check yourself. If you missed more than 5, spend time reviewing the specific NEC articles listed in the references.

The journeyman exam is an open-book test in most states, which means speed matters as much as knowledge. Practice finding answers quickly by tab number, article, and table. The faster you can navigate the codebook, the more questions you'll finish in time.

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