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JOURNEYMAN NEC 2023 FREE FULL-LENGTH EXAM

California Journeyman Electrician Practice Test - Full-Length Test 1

A full-length, 100-question practice exam covering all 8 core NEC topic areas, weighted the same way the real exam is. Modeled on California's real licensing exam format.

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100

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240 min

Time

70%

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100 questions, 240 min, 70% to pass — sized and paced like the California licensing exam. Finish it to see your score and your 3 weakest topics, free.

Open book: the real California exam lets you use the NEC. Keep your code book next to you and practise looking things up.

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TOPICS COVERED

General Requirements Equipment for General Use Wiring and Protection Special Occupancies Load Calculations Wiring Methods and Materials Motor Circuits Special Equipment

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100 questions in 240 minutes, sized and paced like the California journeyman exam.

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How to Use This Practice Test

This California Journeyman Electrician Practice Test - Full-Length Test 1 has 100 questions with detailed answers and NEC references. Take the full test, review every wrong answer, and look up the NEC article it references before moving on.

Tip: This is an open-book exam — tab your NEC index and Articles 210, 250, and 430 before you start.

Topics covered: Branch circuits, grounding, wiring methods, load calculations, and motors.
Passing score: 70–75% (most states). Aim for 80% on practice tests so the real exam feels easy.
Questions: 100 multiple-choice, one correct answer each

California Journeyman Electrician Practice Test - Full-Length Test 1 — Question List

Question 1: What must be provided for electrical equipment that is exposed to physical damage?

Warning signs
Working space
Enclosures or guards
Extra headroom

NEC Reference: NEC 110.27(B)

Question 2: A 3-phase overcurrent device (such as a delta breaker) must not be connected to the bus of a panelboard that has fewer than how many bus bars?

NEC Reference: NEC 408.36(C)

Question 3: Instruments, pilot lights and potential transformers on switchboards must be supplied by circuits protected by overcurrent devices rated not more than:

30 amperes
15 amperes
20 amperes
10 amperes

NEC Reference: NEC 408.52

Question 4: A ground ring used as a grounding electrode must encircle the building with at least how many feet of bare copper conductor, and buried at least how deep?

At least 10 feet, buried 18 inches deep
At least 20 feet, buried 30 inches deep
At least 20 feet, buried 18 inches deep
At least 30 feet, buried 24 inches deep

NEC Reference: NEC 250.52(A)(4)

Question 5: Amusement rides and attractions must not be located closer than how far in any direction from overhead conductors operating at 600 V or less?

20 feet
15 feet
12 feet
8 feet

NEC Reference: NEC 525.5

Question 6: What is the smallest aluminum conductor permitted for underground service conductors?

8 AWG
6 AWG
10 AWG
12 AWG

NEC Reference: NEC 230.31(B)

Question 7: A feeder serves a heating load of 30 kW and a cooling load of 22 kW, both not in use at the same time. For service-load calculations, the value used is:

Sum of both = 52 kW
Average = 26 kW
Larger only = 30 kW
125% of larger = 37.5 kW

NEC Reference: NEC 220.60

Question 8: A feeder uses two 500 kcmil THWN conductors per phase in parallel. How must the equipment grounding conductor be sized for the parallel set?

One EGC sized for the total parallel conductor ampacity is acceptable
Each conduit must have its own EGC sized per Table 250.122 for the OCPD rating
No EGC is required when using parallel conductors of 500 kcmil or larger
The EGC size is based on the conductor size, not the OCPD rating

NEC Reference: NEC 250.122(F)

Question 9: The current carried continuously in bare copper bars in sheet metal auxiliary gutters must not exceed how many amperes per square inch of cross section?

1000 A per sq in
750 A per sq in
700 A per sq in
900 A per sq in

NEC Reference: NEC 366.23

Question 10: What is the minimum load for the required exterior sign or outline lighting for a commercial occupancy as per NEC?

1,200 VA
1,500 VA
1,000 VA
1,800 VA

NEC Reference: NEC 220.14(F)

Question 11: An air conditioning system is fed from its own panel. Per Article 440, the overcurrent protection for the A/C branch circuit is determined by which rule, not just Article 240?

Article 240 ampacity rules always govern A/C circuits
Article 440 governs — the OCPD is sized per nameplate BCSC, not just conductor ampacity
Article 430 motor rules govern all A/C equipment
A/C circuits use the same sizing rules as any other appliance

NEC Reference: NEC Article 440

Question 12: What is the calculated load for a single piece of equipment with four receptacles in a retail shop?

360 Volt-Ampere
720 Volt-Ampere
800 Volt-Ampere
180 Volt-Ampere

NEC Reference: NEC 220.14(I)

Question 13: A feeder supplies a 10 HP and a 15 HP motor, both 230 V, 3-phase, protected by inverse-time breakers. What is the maximum feeder protection?

175 A
105 A
125 A
200 A

NEC Reference: NEC 430.250

Question 14: Dry-type transformers rated not more than ____ are permitted to be installed in hollow spaces of buildings.

50 KVA
100 KVA
85 KVA
75 KVA

NEC Reference: NEC 450.13(B)

Question 15: What is the calculated load for a show window that is 10 feet long, measured horizontally along its base?

2000 V-A
1800 V-A
1600 V-A
2200 V-A

NEC Reference: NEC 220.43(A)

Question 16: In a Class I, Division 1 classified area, sealing fittings in conduit runs must be installed within how many inches of an enclosure where the conduit enters or exits?

6 inches
12 inches
18 inches
36 inches

NEC Reference: NEC 501.15(A)(1)

Question 17: A 120-volt, 30-ampere branch circuit supplies lighting outlets and a cord-and-plug connected air conditioner. What is the maximum full-load current of the air conditioner?

15 amperes
24 amperes
30 amperes
20 amperes

NEC Reference: NEC 440.62(C)

Question 18: What is the ampacity of 8 AWG copper THWN at 75°C?

40 A
50 A
55 A
65 A

NEC Reference: NEC Table 310.16

Question 19: What is the maximum size fuse allowed to protect 12 AWG THW copper branch conductor?

15 amperes
20 amperes
25 amperes
30 amperes

NEC Reference: NEC 240.4(D)(5)

Question 20: The over load protection must be provided for the motor if it is rated more than ____ Hp.

1/8 Hp
1/4 Hp
1/2 Hp
1 Hp

NEC Reference: NEC 430.32(A)

Question 21: What is the minimum rating of the service disconnecting means for a one-family dwelling?

100 ampere for a 3 wire service
140 ampere for a 2 wire service
50 ampere for a 3 wire service
80 ampere for a 2 wire service

NEC Reference: NEC 230.79

Question 22: How many small appliance branch circuits are required at minimum for the kitchen and dining area of a single-family dwelling?

One 20A circuit
Two 20A circuits
Three 20A circuits
One 30A circuit

NEC Reference: NEC 210.11(C)(1)

Question 23: A panelboard is equipped with snap switches rated 30 amperes or less. Its overcurrent protection must not exceed:

30 amperes
150 amperes
200 amperes
225 amperes

NEC Reference: NEC 408.36(A)

Question 24: The overcurrent protection for a feeder or branch circuit must be located where the conductors receive their supply. When is it permitted to place the overcurrent device away from the supply point?

Whenever the load end breaker is close to the equipment
When one of the specific tap rule exceptions in 240.21 applies
For any feeder run longer than 25 feet
The OCPD location is always flexible — it can go anywhere in the circuit

NEC Reference: NEC 240.21(A)

Question 25: A nonautomatic arc welder has a 60% duty cycle and primary current of 50A. Table 630.11(A) gives a multiplier of 0.78 for 60% duty cycle. What is the minimum branch circuit conductor ampacity?

33A — using a 0.65 factor
39A — 50A × 0.78
44A — 50A × 0.89 (80% factor)
50A — no duty cycle reduction

NEC Reference: NEC 630.11(A)

Question 26: Under which condition may conductors of different circuits occupy the same raceway?

If the insulation rating voltage is not less than the maximum circuit voltage
If the insulating rating voltage is greater than the maximum circuit voltage
If the two circuits have same voltage
If the two circuits have same insulation rating voltage

NEC Reference: NEC 300.3(C)(1)

Question 27: Overhead service conductors must not be smaller than ____ copper.

14 AWG
12 AWG
10 AWG
8 AWG

NEC Reference: NEC 230.23(B)

Question 28: A Quick Recovery electric heater is rated at 4500 watts 240 volts. What rating of circuit breaker is required for protecting it?

30 Amperes
25 Amperes
20 Amperes
15 Amperes

NEC Reference: NEC 422.13

Question 29: Insulated equipment grounding conductors are identified by which color?

Red
Green (or green with yellow stripes)
Gray
White

NEC Reference: NEC 250.119

Question 30: Which circuits must NOT be connected to any system that contains trolley wires with a ground return?

Circuits for lighting and power
Grounding conductors
Ungrounded trolley wires
Bonding conductors

NEC Reference: NEC 110.19

Question 31: A hermetic refrigerant motor-compressor has a rated-load current of 34 A. What is the minimum ampere rating of its disconnecting means?

45 amperes
34 amperes
50 amperes
40 amperes

NEC Reference: NEC 440.12(A)(1)

Question 32: A single-family dwelling has one air conditioner rated 4 kW and fixed heating equipment rated 3 kW. What is the calculated load for both?

4 KW
7 KW
3.5 KW
3 KW

NEC Reference: NEC 220.60

Question 33: What is the minimum ampere rating of short circuit ground fault protective device that can be used for individual motor-compressor?

12 amperes
15 amperes
20 amperes
18 amperes

NEC Reference: NEC 440.22(A)

Question 34: In a wet location, a surface-mounted cabinet must be mounted so there is at least how much air space between the enclosure and the wall?

1/4 inch
1/2 inch
3/4 inch
1 inch

NEC Reference: NEC 312.2

Question 35: A panelboard contains snap switches rated 30 amperes or less. What is the maximum rating of its overcurrent protection?

30 amperes
120 amperes
45 amperes
200 amperes

NEC Reference: NEC 408.36(A)

Question 36: Which of the following loads is NOT permitted to be connected to a small appliance branch circuit (SABC)?

A toaster plugged into a counter receptacle
A refrigerator in the kitchen
A microwave on the counter
A ceiling light fixture in the kitchen

NEC Reference: NEC 210.52(B)(2)

Question 37: What is the corrected ampacity of 1/0 copper THWN in a wet location where the ambient temperature is 40°C?

123 Amperes
132 Amperes
150 Amperes
141 Amperes

NEC Reference: NEC 310.16

Question 38: What is the smallest conductor permitted for the pool equipotential bonding grid?

8 AWG solid copper
12 AWG copper
10 AWG copper
6 AWG aluminum

NEC Reference: NEC 680.26(B)

Question 39: For a single-family dwelling unit, what is the minimum allowable rating of 3-wire service-entrance conductors?

120 amperes
100 amperes
150 amperes
200 amperes

NEC Reference: NEC 230.42(B)

Question 40: A 240-volt, single-phase room air conditioner rated not more than ____ may be considered a single motor unit.

30 amperes
40 amperes
50 amperes
60 amperes

NEC Reference: NEC 440.62(A)(2)

Question 41: A 19,000 sq ft commercial building has one hundred eighty 15 A and 20 A, 120 V receptacles. What is the calculated receptacle load?

21,200 VA
18,000 VA
19,600 VA
23,500 VA

NEC Reference: NEC 220.14(I), 220.44

Question 42: A service is supplied by three parallel sets of 400 kcmil copper conductors. What size copper grounding electrode conductor is required?

3/0 AWG
2/0 AWG
2 AWG
4 AWG

NEC Reference: NEC Table 250.66

Question 43: Every commercial occupancy that is accessible to pedestrians must have at least one circuit dedicated to what?

An outdoor GFCI circuit
A sign or outline lighting outlet
An emergency lighting circuit
A dedicated circuit for the cash register

NEC Reference: NEC 600.5(A)

Question 44: What is the minimum general lighting load of a 110,000 sq ft school?

330 KVA
220 KVA
165 KVA
440 KVA

NEC Reference: NEC Table 220.42(A)

Question 45: What is the general lighting load of a 2,500 sq ft dwelling unit that has 20 receptacles and 15 luminaires rated 100 W each?

7500 Volt-Amperes
11000 Volt-Amperes
9500 Volt-Amperes
12000 Volt-Amperes

NEC Reference: NEC 220.41, 220.14(J)

Question 46: Service drop conductors at the point where they enter a dwelling (over a porch or walkway accessible only to pedestrians) must be at least how many feet above the ground?

8 feet
10 feet
12 feet
15 feet

NEC Reference: NEC 230.24(B)(1)

Question 47: How many receptacles must be installed at a minimum for each patient bed in a Category 1 (critical care) patient bed location?

4 receptacles
8 receptacles
12 receptacles
14 receptacles

NEC Reference: NEC 517.19(B)

Question 48: What is the minimum load included for each outlet for a heavy-duty lampholder?

600 volt-amperes
560 volt-amperes
460 volt-amperes
760 volt-amperes

NEC Reference: NEC 220.14(E)

Question 49: What is the minimum size copper conductor permitted for overhead spans up to 50 ft (1000 V or less)?

8 AWG
10 AWG
6 AWG
12 AWG

NEC Reference: NEC 225.6(a)

Question 50: A raceway carries 6 current-carrying THWN conductors in a 40°C ambient. The 75°C ampacity from Table 310.16 must be multiplied by what combined factor?

0.80
0.88
0.70 (about)
0.65

NEC Reference: NEC 310.15(B)(1) / Table 310.15(C)(1)

Question 51: A retail shop has 20 duplex receptacles, each on its own yoke. What is the calculated load for these receptacles?

300 volt-amperes
3,600 volt-amperes
1,800 volt-amperes
36,000 volt-amperes

NEC Reference: NEC 220.14(I)

Question 52: Exposed live parts of a motor operating at 120 volts must be guarded.

True
False

NEC Reference: NEC 430.232

Question 53: What percentage of rated ampacity is allowed for each conductor when a flexible cord has eight current-carrying conductors?

NEC Reference: NEC 400.5(A)(3)

Question 54: All 125-volt, 15- and 20-ampere receptacles installed in dwelling unit bathrooms require:

Non-grounding receptacles
Weatherproof receptacles
Protective guards
GFCI protection

NEC Reference: NEC 210.8(A)(1)

Question 55: What size service conductors are required for a dwelling load with a calculated load is 190 A. The service disconnect breaker is rated at 200 A?

1/0 AWG
2/0 AWG
3/0 AWG
4/0 AWG

NEC Reference: NEC 310.12

Question 56: If four current-carrying conductors are in a raceway, each conductor's allowable ampacity is reduced to:

80 % of ampere rating of the conductor
Maximum ampere rating of the conductor
70 % of ampere rating of the conductor
60 % of ampere rating of the conductor

NEC Reference: NEC Table 310.15(C)(1)

Question 57: Electrical equipment at 120/240 volts has exposed live parts on the front only (Condition 1). What minimum working space depth is required in front of it?

4 feet
3 feet
5 feet
2 feet

NEC Reference: NEC Table 110.26(A)(1)

Question 58: For a permanently connected appliance rated not more than 300 volt-amperes or ____, the branch-circuit overcurrent device can serve as the disconnecting means.

1/2 horsepower
3/4 horsepower
1 horsepower
1/8 horsepower

NEC Reference: NEC 422.31(A)

Question 59: The maximum fill percentage allowed for conductors inside a metallic wireway is:

NEC Reference: NEC 376.22(A)

Question 60: What size overcurrent device is required for a 24 A continuous load?

30 amperes
24 amperes
28 ampers
26 amperes

NEC Reference: NEC 210.20(A)

Question 61: Underground service raceways or ducts entering a building must be sealed.

True
False

NEC Reference: NEC 230.8

Question 62: Five current-carrying conductors, each with an ampacity of 25 A, are in the same cable. What is the adjusted ampacity of each conductor?

25 amperes
20 amperes
30 amperes
22.5 amperes

NEC Reference: NEC Table 310.15(C)(1)

Question 63: Service-entrance cables must be supported by straps within what distance of every service head?

24 inches
36 inches
12 inches
15 inches

NEC Reference: NEC 230.51(A)

Question 64: Flexible cords and cables used to power rides and equipment at carnivals and fairs must be rated for:

Light use only — carnival voltages are low
Any listed flexible cord rated for the voltage and current
Hard-usage or extra-hard-usage service
Type NM cable only — flexible cords are not allowed outdoors

NEC Reference: NEC 525.20(B)

Question 65: An electrician installs a motor according to all NEC rules, but the motor manufacturer instructions say to use a specific wiring method and conductor size that is more restrictive than what the NEC requires. Which takes precedence?

The NEC always overrides manufacturer instructions
The manufacturer installation instructions — they are part of the listing
Whichever is less expensive to install
The local building code, which supersedes both

NEC Reference: NEC 110.3(B)

Question 66: A ground ring used as a grounding electrode must use a copper conductor not smaller than what size?

6 AWG bare copper
4 AWG bare copper
2 AWG bare copper
1/0 AWG bare copper

NEC Reference: NEC 250.52(A)(4)

Question 67: What is the maximum overcurrent protection for 16 AWG copper conductors?

15 A
7 A
20 A
10 A

NEC Reference: NEC 240.4(D)(2)

Question 68: A branch-circuit-rated circuit breaker is marked for use with 18 AWG copper and supplies a continuous load of 5.6 A. What overcurrent protection may be used?

7 amperes
10 amperes
15 amperes
20 amperes

NEC Reference: NEC 240.4(D)(1)

Question 69: At least how many entrances of sufficient area must be provided to give access to the working space around electrical equipment?

NEC Reference: NEC 110.26

Question 70: A transformer secondary in a building has a 2-wire, 240V secondary with a 50A rated secondary conductor. A feeder tap from the secondary conductor runs 15 feet to a panelboard. No OCPD is at the tap point. Under 240.21(C)(1), is this tap permitted?

Yes — transformer secondary taps have no length limit
No — 15 feet exceeds the 10-foot secondary tap rule; the 25-foot rule conditions must be checked instead
Yes — 15 feet is permitted as long as the conductors are in conduit
No — any transformer secondary must have an OCPD directly at the secondary terminals

NEC Reference: NEC 240.21(C)

Question 71: What is the smallest standard ampere rating for fuses and inverse-time circuit breakers in Table 240.6(A)?

10 amperes
15 amperes
20 amperes
25 amperes

NEC Reference: NEC 240.6(A)

Question 72: An Article 411 low-voltage lighting system operates at 30 volts ac or less. What peak voltage does that correspond to?

34 volts
30 volts
38.2 volts
42.4 volts

NEC Reference: NEC 411.1

Question 73: The rating of the overcurrent device protecting a panelboard must ____ the panelboard rating.

Not be greater than
Be 125% of
Be greater than
Be 115% of

NEC Reference: NEC 408.36

Question 74: Field-installed secondary wiring for electric signs of 1000 volts or less must use conductors not smaller than:

18 AWG
16 AWG
14 AWG
12 AWG

NEC Reference: NEC 600.31

Question 75: Adjustment factors for more than three current-carrying conductors do not apply to conductors in raceways not exceeding what length?

24 inch
28 inch
18 inch
20 inch

NEC Reference: NEC 310.15(C)(1)(b)

Question 76: For outside branch circuits 1000 V or less, overhead conductors for spans up to 50 ft must not be smaller than:

18 AWG
12 AWG
10 AWG
8 AWG

NEC Reference: NEC 225.6(A)(1)

Question 77: The minimum headroom of the working space in front of a panelboard, switchboard, or motor control center must be at least:

6 feet
6.5 feet (2.0 m)
7 feet
8 feet

NEC Reference: NEC 110.26(A)(3)

Question 78: An all-electric restaurant has a connected load of 150 kVA on a 120/208 V, 3-phase supply. Using the optional method, what is the required service conductor ampacity?

444 A
333 A
416 A
577 A

NEC Reference: NEC 220.88

Question 79: What size inverse-time circuit breaker is permitted for a 10 HP, 230-volt, 3-phase motor?

70A
56 A
40A
30 A

NEC Reference: NEC 430.250

Question 80: Overhead conductors for festoon lighting must not be smaller than:

8 AWG
6 AWG
12 AWG
10 AWG

NEC Reference: NEC 225.6(B)

Question 81: What is the branch-circuit calculated load for a single 12 kW electric range in a dwelling unit?

6 KW
8 KW
12 KW
15 KW

NEC Reference: NEC 220.55

Question 82: A mechanical contractor wants to run a water supply pipe through the dedicated electrical space directly above a 200A panelboard. Is this permitted?

Yes — water pipe above the panel is fine as long as it does not drip
No — foreign systems including pipes are not permitted in the dedicated electrical space
Yes — but a drip shield must be installed above the panel
Yes — the pipe is permitted if it runs parallel to the panel, not over it

NEC Reference: NEC 110.26(F)(1)(b)

Question 83: Splices and taps in a cabinet or cutout box must not fill more than what percent of the cross-sectional area at that point?

NEC Reference: NEC 312.8

Question 84: A roof-mounted A/C unit must have a disconnecting means located per 440.14 within sight from the equipment OR:

Lockable in the open position per 110.25
Inside the air handler
At the service panel only
Within 100 feet

NEC Reference: NEC 440.14

Question 85: An Oregon dwelling has 1,600 square feet of living area. Using 220.41's 3 VA per square foot general lighting load, what is the total general lighting load?

3,200 VA
4,800 VA
6,400 VA
8,000 VA

NEC Reference: NEC 220.41

Question 86: What is the maximum total of bends permitted in an EMT run between pull points?

60 degrees
90 degrees
180 degrees
360 degrees

NEC Reference: NEC 358.26

Question 87: A branch circuit supplies a continuous load of 16 amperes. Per NEC 210.19(A)(1), what is the minimum ampacity the branch circuit conductor must have?

16 amperes
18 amperes
20 amperes
25 amperes

NEC Reference: NEC 210.19(A)(1)

Question 88: A demand factor is applied to certain dwelling loads because not all loads are likely to operate:

At the same time
At full voltage
On the same phase
From the same panelboard

NEC Reference: NEC Table 220.45

Question 89: Conductors feeding through a cabinet, cutout box, or meter socket enclosure that are not connected to equipment in the enclosure are permitted only if the conductor fill does not exceed what percentage of the cross-sectional area?

40 %
20 %
60 %
100 %

NEC Reference: NEC 312.8

Question 90: In a standard 2-wire branch circuit, how does the size of the neutral conductor compare to the hot conductor?

Half the size of the hot conductor
At least the same size as the hot conductor
Double the size of the hot conductor
No neutral is needed in a 2-wire circuit

NEC Reference: NEC 210.19(A)

Question 91: A clothes dryer nameplate reads 4,700 watts. Under 220.54, what value must be used for load calculation purposes?

4,700 watts
5,000 watts
3,760 watts
9,400 watts

NEC Reference: NEC 220.54

Question 92: What size branch-circuit conductor is required for an 18-ampere motor-compressor connected to a 240-volt circuit, with terminals rated at 75 C?

12 AWG
10 AWG
14 AWG
8 AWG

NEC Reference: NEC 440.32 / Table 310.16

Question 93: Conductors are permitted to be connected in parallel (electrically joined at both ends) only when they are sized:

1/0 AWG and larger
14 AWG and larger
8 AWG and larger
Any size is permitted to be paralleled

NEC Reference: NEC 310.10(G)(1)

Question 94: The 10-foot feeder tap rule (240.21(B)(1)) allows a smaller conductor to be tapped from a feeder without an OCPD at the tap point. What is a key condition that must be met?

Tap conductors must be in free air only, not in conduit
Tap conductors must be at least 1/10 the rating of the feeder OCPD and enclosed in a raceway
Tap conductors must match the ampacity of the full feeder
Tap conductors longer than 10 feet are acceptable if in conduit

NEC Reference: NEC 240.21(B)(1)

Question 95: Fixed outdoor electric de-icing and snow-melting equipment must be protected by:

Ground-fault protection of equipment (GFPE)
No protection at all
A simple fuse only, no GFPE
AFCI protection only

NEC Reference: NEC 426.28

Question 96: Per Article 100, how does the NEC define "identified" as applied to equipment suitability?

Recognizable as suitable for the specific purpose, use, or application, per a qualified testing lab
"Identified" simply means the equipment has a serial number
Identified equipment need not be evaluated by any testing entity
"Identified" and "listed" mean the exact same thing in every context

NEC Reference: NEC Art. 100

Question 97: Per NEC 230.42(B), ungrounded service-entrance conductors for a specific installation generally must not be smaller than what, relative to the service disconnecting means?

The rating of the service disconnecting means
125% of the disconnect rating
Half the disconnect rating
The utility transformer rating

NEC Reference: NEC 230.42(B)

Question 98: A motor nameplate shows FLA = 40A and service factor = 1.15. What is the highest trip setting allowed on the overload relay?

40A — match the FLA exactly
46A — 115% of FLA
50A — 125% of FLA
56A — 140% of FLA

NEC Reference: NEC 430.32(A)(1)

Question 99: Which NEC article generally covers intrinsically safe systems, including conductor color identification requirements?

Article 504
Article 500
Article 725
Article 501

NEC Reference: NEC Article 504

Question 100: A Maryland contractor installs a junction box in a finished ceiling but leaves it accessible via a removable ceiling tile. Per 314.29, is this compliant?

Yes, a removable ceiling tile provides access without removing building structure
No, all junction boxes must be surface mounted and fully exposed
No, boxes above a ceiling are always prohibited regardless of access
Accessibility rules do not apply to junction boxes

NEC Reference: NEC 314.29

Key NEC References for This Test

Article	What It Covers
Art. 100	Definitions — know: feeder, branch circuit, OCPD, dwelling unit
Art. 210	Branch Circuits — GFCI/AFCI locations, circuit ratings, outlet spacing (most tested)
Art. 220	Load Calculations — dwelling unit standard method
Art. 250	Grounding & Bonding — GEC sizing, electrode system, EGC
Art. 310	Conductors — ampacity (Table 310.12), insulation, derate rules
Art. 430	Motors — conductor 125% FLA, OCPD 250% FLA, overloads, disconnects

Study Tip: Tab Articles 210, 250, and 430 in your NEC before the exam. Know the Table 310.12 ampacity values for 14, 12, 10, 8, 6, and 4 AWG copper.

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California Journeyman Electrician Practice Test - Full-Length Test 1

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California Journeyman Electrician Practice Test - Full-Length Test 1 — Question List

Question 1: What must be provided for electrical equipment that is exposed to physical damage?

Question 2: A 3-phase overcurrent device (such as a delta breaker) must not be connected to the bus of a panelboard that has fewer than how many bus bars?

Question 3: Instruments, pilot lights and potential transformers on switchboards must be supplied by circuits protected by overcurrent devices rated not more than:

Question 4: A ground ring used as a grounding electrode must encircle the building with at least how many feet of bare copper conductor, and buried at least how deep?

Question 5: Amusement rides and attractions must not be located closer than how far in any direction from overhead conductors operating at 600 V or less?

Question 6: What is the smallest aluminum conductor permitted for underground service conductors?

Question 7: A feeder serves a heating load of 30 kW and a cooling load of 22 kW, both not in use at the same time. For service-load calculations, the value used is:

Question 8: A feeder uses two 500 kcmil THWN conductors per phase in parallel. How must the equipment grounding conductor be sized for the parallel set?

Question 9: The current carried continuously in bare copper bars in sheet metal auxiliary gutters must not exceed how many amperes per square inch of cross section?

Question 10: What is the minimum load for the required exterior sign or outline lighting for a commercial occupancy as per NEC?

Question 11: An air conditioning system is fed from its own panel. Per Article 440, the overcurrent protection for the A/C branch circuit is determined by which rule, not just Article 240?

Question 12: What is the calculated load for a single piece of equipment with four receptacles in a retail shop?

Question 13: A feeder supplies a 10 HP and a 15 HP motor, both 230 V, 3-phase, protected by inverse-time breakers. What is the maximum feeder protection?

Question 14: Dry-type transformers rated not more than ____ are permitted to be installed in hollow spaces of buildings.

Question 15: What is the calculated load for a show window that is 10 feet long, measured horizontally along its base?

Question 16: In a Class I, Division 1 classified area, sealing fittings in conduit runs must be installed within how many inches of an enclosure where the conduit enters or exits?

Question 17: A 120-volt, 30-ampere branch circuit supplies lighting outlets and a cord-and-plug connected air conditioner. What is the maximum full-load current of the air conditioner?

Question 18: What is the ampacity of 8 AWG copper THWN at 75°C?

Question 19: What is the maximum size fuse allowed to protect 12 AWG THW copper branch conductor?

Question 20: The over load protection must be provided for the motor if it is rated more than ____ Hp.

Question 21: What is the minimum rating of the service disconnecting means for a one-family dwelling?

Question 22: How many small appliance branch circuits are required at minimum for the kitchen and dining area of a single-family dwelling?

Question 23: A panelboard is equipped with snap switches rated 30 amperes or less. Its overcurrent protection must not exceed:

Question 24: The overcurrent protection for a feeder or branch circuit must be located where the conductors receive their supply. When is it permitted to place the overcurrent device away from the supply point?

Question 25: A nonautomatic arc welder has a 60% duty cycle and primary current of 50A. Table 630.11(A) gives a multiplier of 0.78 for 60% duty cycle. What is the minimum branch circuit conductor ampacity?

Question 26: Under which condition may conductors of different circuits occupy the same raceway?

Question 27: Overhead service conductors must not be smaller than ____ copper.

Question 28: A Quick Recovery electric heater is rated at 4500 watts 240 volts. What rating of circuit breaker is required for protecting it?

Question 29: Insulated equipment grounding conductors are identified by which color?

Question 30: Which circuits must NOT be connected to any system that contains trolley wires with a ground return?

Question 31: A hermetic refrigerant motor-compressor has a rated-load current of 34 A. What is the minimum ampere rating of its disconnecting means?

Question 32: A single-family dwelling has one air conditioner rated 4 kW and fixed heating equipment rated 3 kW. What is the calculated load for both?

Question 33: What is the minimum ampere rating of short circuit ground fault protective device that can be used for individual motor-compressor?

Question 34: In a wet location, a surface-mounted cabinet must be mounted so there is at least how much air space between the enclosure and the wall?

Question 35: A panelboard contains snap switches rated 30 amperes or less. What is the maximum rating of its overcurrent protection?

Question 36: Which of the following loads is NOT permitted to be connected to a small appliance branch circuit (SABC)?

Question 37: What is the corrected ampacity of 1/0 copper THWN in a wet location where the ambient temperature is 40°C?

Question 38: What is the smallest conductor permitted for the pool equipotential bonding grid?

Question 39: For a single-family dwelling unit, what is the minimum allowable rating of 3-wire service-entrance conductors?

Question 40: A 240-volt, single-phase room air conditioner rated not more than ____ may be considered a single motor unit.

Question 41: A 19,000 sq ft commercial building has one hundred eighty 15 A and 20 A, 120 V receptacles. What is the calculated receptacle load?

Question 42: A service is supplied by three parallel sets of 400 kcmil copper conductors. What size copper grounding electrode conductor is required?

Question 43: Every commercial occupancy that is accessible to pedestrians must have at least one circuit dedicated to what?

Question 44: What is the minimum general lighting load of a 110,000 sq ft school?

Question 45: What is the general lighting load of a 2,500 sq ft dwelling unit that has 20 receptacles and 15 luminaires rated 100 W each?

Question 46: Service drop conductors at the point where they enter a dwelling (over a porch or walkway accessible only to pedestrians) must be at least how many feet above the ground?

Question 47: How many receptacles must be installed at a minimum for each patient bed in a Category 1 (critical care) patient bed location?

Question 48: What is the minimum load included for each outlet for a heavy-duty lampholder?

Question 49: What is the minimum size copper conductor permitted for overhead spans up to 50 ft (1000 V or less)?

Question 50: A raceway carries 6 current-carrying THWN conductors in a 40°C ambient. The 75°C ampacity from Table 310.16 must be multiplied by what combined factor?

Question 51: A retail shop has 20 duplex receptacles, each on its own yoke. What is the calculated load for these receptacles?

Question 52: Exposed live parts of a motor operating at 120 volts must be guarded.

Question 53: What percentage of rated ampacity is allowed for each conductor when a flexible cord has eight current-carrying conductors?

Question 54: All 125-volt, 15- and 20-ampere receptacles installed in dwelling unit bathrooms require:

Question 55: What size service conductors are required for a dwelling load with a calculated load is 190 A. The service disconnect breaker is rated at 200 A?

Question 56: If four current-carrying conductors are in a raceway, each conductor's allowable ampacity is reduced to:

Question 57: Electrical equipment at 120/240 volts has exposed live parts on the front only (Condition 1). What minimum working space depth is required in front of it?

Question 58: For a permanently connected appliance rated not more than 300 volt-amperes or ____, the branch-circuit overcurrent device can serve as the disconnecting means.

Question 59: The maximum fill percentage allowed for conductors inside a metallic wireway is:

Question 60: What size overcurrent device is required for a 24 A continuous load?

Question 61: Underground service raceways or ducts entering a building must be sealed.

Question 62: Five current-carrying conductors, each with an ampacity of 25 A, are in the same cable. What is the adjusted ampacity of each conductor?

Question 63: Service-entrance cables must be supported by straps within what distance of every service head?

Question 64: Flexible cords and cables used to power rides and equipment at carnivals and fairs must be rated for:

Question 65: An electrician installs a motor according to all NEC rules, but the motor manufacturer instructions say to use a specific wiring method and conductor size that is more restrictive than what the NEC requires. Which takes precedence?

Question 66: A ground ring used as a grounding electrode must use a copper conductor not smaller than what size?

Question 67: What is the maximum overcurrent protection for 16 AWG copper conductors?

Question 68: A branch-circuit-rated circuit breaker is marked for use with 18 AWG copper and supplies a continuous load of 5.6 A. What overcurrent protection may be used?

Question 69: At least how many entrances of sufficient area must be provided to give access to the working space around electrical equipment?