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JOURNEYMAN NEC 2023 FREE FULL-LENGTH EXAM

Georgia Electrical Contractor Practice Test - Full-Length Test 1

A full-length, 80-question practice exam covering all 8 core NEC topic areas, weighted the same way the real exam is. Modeled on Georgia's real licensing exam format.

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240 min

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TOPICS COVERED

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

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80 questions in 240 minutes, sized and paced like the Georgia journeyman exam.

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How to Use This Practice Test

This Georgia Electrical Contractor Practice Test - Full-Length Test 1 has 80 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: 80 multiple-choice, one correct answer each

Georgia Electrical Contractor Practice Test - Full-Length Test 1 — Question List

Question 1: Electrical equipment installed in a chemical storage room where the atmosphere could corrode metal parts must be:

Standard equipment — corrosion is a maintenance issue, not a code issue
Equipment approved or listed for use in the specific corrosive environment
Equipment rated NEMA 1 with a painted finish
No restriction — any equipment in a metal enclosure is acceptable

NEC Reference: NEC 110.11

Question 2: What is the maximum demand for eight household electric ranges (each rated not over 12 kW), per Table 220.55 Column C?

17 KW
23 KW
28 KW
32 KW

NEC Reference: NEC 220.55

Question 3: What is the maximum overcurrent device rating for an autotransformer with a full-load input current of 50 amperes?

70 amperes
60 amperes
80 amperes
100 amperes

NEC Reference: NEC 450.4(A)

Question 4: A 400 A breaker protects 450 kcmil copper feeder conductors. A 10-foot tap from this feeder supplies a disconnect with a 25 A overcurrent device. What is the minimum size copper tap conductor?

8 AWG
6 AWG
4 AWG
10 AWG

NEC Reference: NEC 240.21(B)(1), Table 310.16

Question 5: Which of the following must have at least one 20-ampere laundry branch circuit?

Industrial wash room
Dwelling unit
Commercial utility room
Motel unit

NEC Reference: NEC 210.11(C)(2)

Question 6: Threaded conduit in hazardous locations must be made ____ to prevent sparking when fault current flows through it.

Wrenchtight
Sealed
Bonded
Rugged plastic

NEC Reference: NEC 500.8(E)

Question 7: Overhead service conductors operating at 400 volts that pass over a public street must have a minimum clearance of:

15 feet
10 feet
24 feet
18 feet

NEC Reference: NEC 230.24(B)(4)

Question 8: A 30 kVA arc welder rated for nonautomatic duty cycle 60% has a primary current of 50A. Per 630.11(A), branch-circuit conductor ampacity is calculated using the multiplier:

0.55
0.78
1.00
1.25

NEC Reference: NEC Table 630.11(A)

Question 9: The disconnecting means for a 2400-volt motor must be capable of being locked in the:

Closed position
Open position
On position
Either position

NEC Reference: NEC 430.227

Question 10: The life safety branch of a hospital emergency system must automatically transfer to backup power within how many seconds of a normal power outage?

5 seconds
10 seconds
30 seconds
60 seconds

NEC Reference: NEC 517.31

Question 11: Which of the following locations type NM cable can be permitted to use?

As a service entrance cable
In storage battery rooms
In elevators or escalators
One and two family dwelling units

NEC Reference: NEC 334.12

Question 12: The GEC to a concrete-encased electrode is not required to be larger than what size copper conductor?

8 AWG copper
6 AWG copper
4 AWG copper
2 AWG copper

NEC Reference: NEC 250.66(B)

Question 13: The motor nameplate shown has the following data: 460V, 3-phase, 25HP, FLA = 34A, SF = 1.0. What is the minimum conductor ampacity for the branch circuit feeding this motor?

34 A (nameplate FLA directly)
39 A (115% of FLA)
42.5 A (125% of FLA)
51 A (150% of FLA)

NEC Reference: NEC 430.22

Question 14: If a 20 ampere AC snap switch is used to disconnect a 1.5 HP motor what must be the maximum full load current of a motor?

16 amperes
20 amperes
15 amperes
17 amperes

NEC Reference: NEC 430.109(C)(2)

Question 15: Intrinsically safe conductors are identified by ____

Red
Black
Blue
Brown

NEC Reference: NEC 504.80(C)

Question 16: Horizontal runs of metal wireway must be supported at intervals not exceeding how many feet?

NEC Reference: NEC 376.30

Question 17: When calculating the service or feeder load for motors in a commercial building, how is the largest motor treated compared to the others?

All motor loads are added at 100% of FLA
The largest motor is at 125% FLA; all others at 100%
All motors are totaled and then a 75% demand factor is applied
Motors are not included in the service load calculation

NEC Reference: NEC 220.50

Question 18: Lampholders connected to branch circuits rated more than ____ must be of the heavy-duty type.

20 amperes
25 amperes
40 amperes
45 amperes

NEC Reference: NEC 210.21(A)

Question 19: Per NEC 220.14(K), the receptacle load in office buildings and banks is the larger of 1 VA per sq ft or how many VA per receptacle outlet?

100 VA
150 VA
180 VA
250 VA

NEC Reference: NEC 220.14(K)

Question 20: The overload protection must be provided for the motor if it is rated more than ____ hp

NEC Reference: NEC 430.32(A)

Question 21: Which lampholder may be installed in either a damp or a wet location?

One listed for wet locations
One listed for damp locations
One listed for dry locations
Any lampholder

NEC Reference: NEC 410.96

Question 22: Per 220.87, an existing service can be evaluated using 125% of the highest measured demand from the previous 12 months of metered data, plus the new load being added. When is this method most useful?

When installing a new service from scratch
When adding a new load to an existing service and actual demand data shows available capacity
Only for commercial buildings, not residences
When the utility requires a demand study

NEC Reference: NEC 220.87

Question 23: The equipotential bonding grid for a permanently installed swimming pool, per 680.26(B), uses a solid copper conductor of size:

Not smaller than 8 AWG solid copper
14 AWG stranded copper
12 AWG aluminum
Any size as long as bare

NEC Reference: NEC 680.26(B)

Question 24: What is the general lighting unit load for a restaurant, per NEC Table 220.42(A)?

1.5 VA per sq ft
1 VA per sq ft
3 VA per sq ft
2 VA per sq ft

NEC Reference: NEC Table 220.42(A)

Question 25: EMT (electrical metallic tubing) must be supported at maximum intervals of how many feet, and within how many feet of every box or fitting?

Every 6 feet, within 12 inches of boxes
Every 10 feet, within 3 feet of boxes
Every 10 feet, within 12 inches of boxes
Every 12 feet, within 3 feet of boxes

NEC Reference: NEC 358.30(A)

Question 26: An installation consists of a single branch circuit with a limited load. What is the minimum rating of the service disconnecting means?

10 amperes
15 amperes
20 amperes
25 amperes

NEC Reference: NEC 230.79(A)

Question 27: All conductors of a circuit must be installed in the same raceway to:

Minimize induction heating
Reduce fault current
Make maintenance easier
Reduce voltage drop

NEC Reference: NEC 300.3(B), 300.20(A)

Question 28: When doing a box fill calculation, how many cubic inches does one 12 AWG conductor count for?

2.00 cu in
2.25 cu in
2.50 cu in
3.00 cu in

NEC Reference: NEC Table 314.16(B)

Question 29: A 15-unit apartment building has 900 sq ft per apartment. What is the demand load for general lighting, small-appliance and laundry circuits?

39,750 VA
108,000 VA
7,200 VA
75,600 VA

NEC Reference: NEC Table 220.45

Question 30: A commercial branch circuit has a computed receptacle load of 3,400 VA. How many receptacle outlets does this support?

NEC Reference: NEC 220.14(I)

Question 31: What is the minimum working space depth for equipment rated 601–1000 volts with exposed live parts on both sides of the working space (Condition 3)?

3 feet
4 feet
5 feet
6 feet

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

Question 32: A non-dwelling occupancy has a receptacle load of 15 kVA. What demand factor applies to the portion above 10 kVA?

NEC Reference: NEC 220.44

Question 33: A 10-ft feeder tap terminates in a 40 A overcurrent device. Which tap conductor ampacity is acceptable?

38 Amperes
39 Amperes
41 Amperes
35 Amperes

NEC Reference: NEC 240.21

Question 34: What must be provided for all working spaces around indoor service equipment, switchboards and panelboards?

Illumination
Enclosures or guards
A fire extinguisher
A floor drain

NEC Reference: NEC 110.26(D)

Question 35: An industrial machine nameplate says: 240V, 3-phase, supply current = 60A. What is the minimum conductor ampacity for the supply circuit to this machine?

60 A (match the nameplate)
69 A (115% of supply current)
75 A (125% of supply current)
80 A (next standard size)

NEC Reference: NEC 670.4(B)

Question 36: What is the total branch-circuit load for general illumination in a 3,000 sq ft dwelling?

5000 Volt-Amperes
9000 Volt-Amperes
3000 Volt-Amperes
7000 Volt-Amperes

NEC Reference: NEC 220.41

Question 37: The diagram shows an EMT run along a wall. Supports are placed at 8-foot intervals along most of the run, but there is one 12-foot unsupported span near a 90-degree bend. Is this installation acceptable?

Yes — EMT near a bend can have a longer unsupported span
No — 12 feet exceeds the 10-foot maximum support interval
Yes — the bend acts as a natural support point
No — EMT can only be supported every 8 feet maximum

NEC Reference: NEC 358.30(A)

Question 38: A 2400-watt fixed electric space heater is connected to a 240-volt, single-phase, 2-wire circuit. What is the minimum size copper conductor for the branch circuit?

14 AWG
12 AWG
10 AWG
8 AWG

NEC Reference: NEC 424.3(B)

Question 39: Type MC cable must be secured at intervals not exceeding how many feet, and within how many inches of every box or termination?

Every 4½ feet, within 12 inches of boxes
Every 6 feet, within 12 inches of boxes
Every 6 feet, within 3 feet of boxes
Every 10 feet, within 3 feet of boxes

NEC Reference: NEC 330.30(A)

Question 40: Under which condition is an on-site generator NOT considered a separately derived system?

When the generator has no neutral conductor
When the generator is near the service panel
When the transfer switch also switches the neutral
When the generator neutral is solidly interconnected with the service neutral

NEC Reference: NEC 250.30

Question 41: How many 10 AWG conductors can be spliced within an 11 cu in conduit body?

NEC Reference: NEC 314.16(B)

Question 42: Portable stage cables and cords used in theaters must be rated for what type of service?

Light-duty service — stage use is low voltage
Hard usage or extra-hard usage (listed stage cable)
Any flexible cord rated for the voltage
Type NM cable pulled through the stage floor

NEC Reference: NEC 520.68(A)

Question 43: What is the smallest copper conductor permitted for underground service conductors?

8 AWG
6 AWG
10 AWG
12 AWG

NEC Reference: NEC 230.31(B)

Question 44: A 75 kVA, 480V — 208Y/120V transformer is protected on the primary only. Primary FLC is approximately 90A. Maximum primary OCPD is:

100A
110A
125A
150A

NEC Reference: NEC 450.3(B) / 240.6

Question 45: The grounding diagram shows a 200A service. The GEC runs from the service panel to a concrete-encased electrode (rebar) and also connects to the metal water pipe inside the building. A bonding jumper ties the water pipe to the service equipment. Which part of this system is the main bonding jumper?

The GEC running from the panel to the rebar in the footing
The connection inside the service panel that ties the neutral bus to the metal enclosure
The bonding jumper from the water pipe to the panel
The ground rod itself at the point of burial

NEC Reference: NEC 250.28

Question 46: Which of the following is covered by Article 670 (Industrial Machinery)?

A residential HVAC unit
A CNC machining center with multiple motors on a single frame
A 200A commercial panel
A crane in a warehouse

NEC Reference: NEC Article 670

Question 47: Ten 10 AWG THWN conductors (all current-carrying) are run in a conduit in a machine room where the ambient temperature is 45°C. Applying both the temperature correction (0.82 for 45°C at 75°C insulation) and the bundling factor (50% for 10 conductors), what is the adjusted ampacity of each conductor?

14 A (35 A × 0.82 × 0.50)
18 A (35 A × 0.50, bundling only)
29 A (35 A × 0.82, temperature only)
35 A (no derating)

NEC Reference: NEC Tables 310.15(B)(1) and 310.15(C)(1)

Question 48: A grounding electrode conductor (GEC) run to the grounding electrode system is normally required to be one continuous conductor without splices. Under what condition is a splice permitted?

Using a standard listed wire connector (wire nut)
Using an irreversible compression connector or exothermic welding
Any time the splice is inside a listed junction box
GEC splices are never permitted under any conditions

NEC Reference: NEC 250.64(C)

Question 49: Per 690.12, rapid shutdown of a roof-mounted PV array on a one-family dwelling must reduce voltages outside the array boundary to:

30V or less within 30 seconds
50V or less within 60 seconds
0V immediately
120V or less within 5 seconds

NEC Reference: NEC 690.12

Question 50: In a panelboard, a two-pole circuit breaker is considered to be:

A single overcurrent device
Two overcurrent devices
Three overcurrent devices
Four overcurrent devices

NEC Reference: NEC 408.54

Question 51: Heavy-duty lighting track is lighting track identified for use exceeding:

15 amperes
20 amperes
30 amperes
40 amperes

NEC Reference: NEC 410.153

Question 52: A dual-element (time-delay) fuse has two separate fusible elements. What advantage does this give it over a standard one-time fuse?

It can be reset after it blows without replacing it
It handles temporary motor inrush without blowing while still protecting against short circuits
It is rated for twice the interrupting capacity of a one-time fuse
It uses aluminum elements for greater conductivity

NEC Reference: NEC 430.52, UL 248

Question 53: 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 54: Per 220.84, what demand factor can be used when calculating the feeder or service for five apartment units in a multifamily building?

100% — no demand factor applies to apartment buildings
Approximately 45% per Table 220.84 for 5 units
25% — same as the large building demand factor
75% — fixed appliance demand factor

NEC Reference: NEC 220.84, Table 220.84

Question 55: 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 56: What is the full-load current of a 5 HP, 230-volt single-phase ac motor per Table 430.248?

28 Amperes
40 amperes
44 amperes
32 amperes

NEC Reference: NEC 430.248

Question 57: The supply-side bonding jumper connects what two points in a service or separately derived system?

The grounding electrode to the main panel enclosure
Metal enclosures and raceways on the supply side to the grounded service conductor
The neutral bus in the panel to the ground rods
The main breaker to the service panel enclosure

NEC Reference: NEC 250.102(A), (C)

Question 58: 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 59: Branch circuit conductors feeding equipment with 60°C rated terminations must be sized using which column from Table 310.16, regardless of the conductor insulation temperature rating?

The 90°C column — THHN wire is 90°C rated
The 75°C column — THWN is more commonly used
The 60°C column — the terminal rating limits you to 60°C ampacity
Either the 60°C or 75°C column, whichever gives a smaller wire

NEC Reference: NEC 110.14(C)(1)(a)

Question 60: In the dwelling service-entrance diagram, the grounded service conductor is bonded to the equipment grounding system at:

The service equipment only (main bonding jumper)
Every subpanel in the dwelling
The meter base only
No bonding is required

NEC Reference: NEC 250.24(B)

Question 61: Multiconductor cables used as overhead service conductors must be attached to buildings or other structures by:

Tie wires
Any enclosure
Fittings identified for use with service conductors
Nails

NEC Reference: NEC 230.27

Question 62: Locknuts, bushings and internal cable clamps are all ignored in box fill calculations.

True
False

NEC Reference: NEC 314.16(B)

Question 63: Rod and pipe electrodes must be installed so that at least how much of their length is in contact with the soil?

6 ft
8 ft
9 ft
10 ft

NEC Reference: NEC 250.53(A)(4)

Question 64: A 6 AWG copper THHN conductor, limited to its 75°C ampacity by the terminals, can carry about how many kW at 240 volts?

15.6 KW
7.8 KW
12.5 KW
6.5 KW

NEC Reference: NEC 310.16

Question 65: A dwelling has both a 5-ton central A/C unit and 10 kW of electric baseboard heat. When sizing the service, how do you handle these two loads?

Add both loads together — they could both run at the same time
Use only the larger of the two loads
Use 50% of each load and add them
Use only the A/C load and ignore the heat

NEC Reference: NEC 220.60

Question 66: At bulk storage plants, PVC conduit is permitted for underground wiring where buried under not less than how much cover?

2 ft
3 ft
1 ft
4 ft

NEC Reference: NEC 515.8

Question 67: A 5 HP single phase motor is connected to a 240 volts power supply. What is the minimum size branch circuit conductors required for this motor?

No 8 THWN
No 6 THWN
No 4 THWN
No 10 THWN

NEC Reference: NEC 430.248

Question 68: Which conductors of a residential electric service must be provided with overcurrent protection?

Ungrounded conductors
Grounded (neutral) conductors
Equipment grounding conductors
Grounding electrode conductors

NEC Reference: NEC 240.15(A)

Question 69: What is the maximum recommended voltage drop for a feeder, in percent?

NEC Reference: NEC 215.2(A) Informational Note

Question 70: The next-size-up rule of 240.4(B) does not apply when sizing overcurrent protection for transformer secondary conductors.

True
False

NEC Reference: NEC 240.21(C)

Question 71: What is the maximum fuse size to protect a 12 AWG copper conductor?

20 amperes
15 amperes
25 amperes
30 amperes

NEC Reference: NEC 240.4(D)(5)

Question 72: When eight 16A current carrying conductors are grouped in to a flexible cord. What is the allowable ampacity of each conductor?

11.2 amperes
16 amperes
12.8 amperes
14.4

NEC Reference: NEC 400.5(A)(3)

Question 73: Five 12 AWG THWN conductors (all current-carrying) are in the same conduit. What bundling adjustment factor applies, and what is the adjusted ampacity of each conductor?

70% factor — 25A × 0.70 = 17.5A
80% factor — 25A × 0.80 = 20A
90% factor — 25A × 0.90 = 22.5A
No derating — five conductors is under the threshold

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

Question 74: A rod-type grounding electrode must have a minimum length of:

4 feet
6 feet
8 feet
10 feet

NEC Reference: NEC 250.52(A)(5)

Question 75: A contractor uses liquidtight flexible metal conduit (LFMC) to connect a rooftop HVAC unit subject to vibration. Per 350.10, why is LFMC well suited to this application?

It is permitted specifically for equipment subject to vibration, combining flexibility with liquidtight protection
LFMC is required by the NEC for all rooftop connections regardless of vibration
LFMC can never be used outdoors under any condition
LFMC is restricted exclusively to underground use

NEC Reference: NEC 350.10

Question 76: A Maryland panelboard has multiple branch circuits sharing a common neutral (multiwire branch circuit) supplying receptacles in different rooms. Per 210.4(B), what device requirement applies?

A means to simultaneously disconnect all ungrounded conductors at the panelboard
No special disconnect means is required
Each conductor must have its own separate panelboard
Multiwire branch circuits are prohibited entirely

NEC Reference: NEC 210.4(B)

Question 77: A dwelling has the required minimum of two 20-amp small appliance circuits. Per 220.52(A), what is the total VA value for these circuits in the load calculation?

1,500 VA
3,000 VA
4,500 VA
6,000 VA

NEC Reference: NEC 220.52(A)

Question 78: A group of motors is fed from a single feeder. Per 430.24, which single motor value gets the extra 25 percent added to the sum of full-load currents?

The highest-rated motor in the group
The lowest-rated motor in the group
The average of all motors combined
Whichever motor starts first chronologically

NEC Reference: NEC 430.24

Question 79: A Maryland contractor installs Type MC cable exposed along a basement ceiling. Per 330.30, at what maximum interval must this cable be supported?

Not exceeding 6 feet
Not exceeding 20 feet
MC cable never requires support when run exposed
Only at the two ends, regardless of run length

NEC Reference: NEC 330.30

Question 80: A dwelling unit has a sump pump on a dedicated 120V, 20A circuit in the unfinished basement. Does 210.8(A)(5) require GFCI protection here?

No, sump pumps are always exempt from GFCI protection
Yes, unfinished basement receptacles require GFCI protection
Only if the basement floods regularly
No, GFCI only applies to finished basements

NEC Reference: NEC 210.8(A)(5)

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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