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JOURNEYMAN NEC 2023 FREE FULL-LENGTH EXAM

Journeyman Electrician Practice Test - Full-Length Test 1 (Standard 73Q/4-Hour)

A full-length, 80-question practice exam covering all 8 core NEC topic areas, weighted the same way the real exam is. A standard-length exam matching the typical multi-state PSI format.

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TOPICS COVERED

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

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How to Use This Practice Test

This Journeyman Electrician Practice Test - Full-Length Test 1 (Standard 73Q/4-Hour) 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

Journeyman Electrician Practice Test - Full-Length Test 1 (Standard 73Q/4-Hour) — Question List

Question 1: Per NEC Table 220.42(A), what is the general lighting unit load for hotels and motels?

1.7 VA per sq ft
2 VA per sq ft
2.5 VA per sq ft
3 VA per sq ft

NEC Reference: NEC Table 220.42(A)

Question 2: What is the minimum general lighting load for a 1,500 sq ft single-family dwelling unit?

4500 VA
4800 VA
3000 VA
1500 VA

NEC Reference: NEC 220.41

Question 3: 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 4: What is the minimum ampacity of a tap conductor supplying an industrial heating appliance from a 30 A branch circuit?

10 amperes
20 amperes
15 amperes
18 amperes

NEC Reference: NEC 210.19(A)(4)

Question 5: 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 6: In Class I locations, which method may NOT be relied on for bonding?

Locknut-bushing and double-locknut contacts
Bonding jumpers with proper fittings
Threaded hubs made up wrenchtight
Threaded couplings made up wrenchtight

NEC Reference: NEC 501.30

Question 7: What demand factor applies to six household electric clothes dryers?

75 %
70 %
85 %
80 %

NEC Reference: NEC Table 220.54

Question 8: When two or more conductors are installed in parallel to form a single large feeder, each individual conductor must be at least what size?

4 AWG copper — any size is fine if the total is adequate
2 AWG copper minimum for parallel conductors
1/0 AWG copper minimum per conductor
4/0 AWG copper — parallel conductors must be very large

NEC Reference: NEC 310.10(H)(1)

Question 9: What is the minimum size copper grounding electrode conductor permitted by Table 250.66 (for example, to a ground rod on a small service)?

6 AWG
8 AWG
4 AWG
16 AWG

NEC Reference: NEC Table 250.66, 250.66(A)

Question 10: What copper THW conductor (75°C terminals) is needed for a 40 A single-phase continuous-duty motor?

No 8 THW
No 6 THW
No 12 THW
No 14 THW

NEC Reference: NEC 430.22, Table 310.16

Question 11: 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 12: 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 13: A 50 HP, 460-volt, 3-phase motor is supplied by THWN conductors. What minimum ampacity must the branch-circuit conductors have?

81.25 amperes
74.75 amperes
70 amperes
85 amperes

NEC Reference: NEC 430.250

Question 14: 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 15: 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 16: What is the minimum size copper conductor permitted for open individual overhead conductors operating over 1000 volts?

No. 6 AWG
No. 8 AWG
No. 10 AWG
No. 12 AWG

NEC Reference: NEC 225.6(A)(2)

Question 17: A single-phase, 230-volt motor has a nameplate full-load current of 40 A and no marked service factor or temperature rise. What is the maximum overload protection rating?

46 amperes
40 amperes
50 amperes
60 amperes

NEC Reference: NEC 430.32

Question 18: The diagram shows a 480–208Y/120V transformer feeding a subpanel 40 feet away. The system bonding jumper is installed at both the transformer secondary and at the subpanel neutral-ground bus. What is wrong with this installation?

Nothing is wrong — double bonding improves safety
The system bonding jumper can only be at one location, not both
The transformer secondary does not need a system bonding jumper
The subpanel is too far from the transformer for this wiring method

NEC Reference: NEC 250.30(A)(1)

Question 19: A 4 11/16 × 1½-inch square box has a volume of 29.5 cu in. What is the maximum number of 12 AWG conductors permitted (no devices, clamps or fittings)?

NEC Reference: NEC Table 314.16(A)

Question 20: Under certain conditions, equipment grounding conductors are counted as current-carrying conductors.

True
False

NEC Reference: NEC 310.15(F)

Question 21: The panel diagram shows a 120/240V panel with a multiwire branch circuit. Circuit 1 is a single-pole 20A breaker with a black wire and circuit 3 is a single-pole 20A breaker with a red wire — both share a white neutral wire. Is this panel wiring correct?

Yes — two single-pole breakers are fine if they are on opposite legs
No — a handle tie or 2-pole breaker is required for multiwire branch circuits
Yes — as long as the neutral is the same color throughout
No — multiwire branch circuits are not permitted in residential panels

NEC Reference: NEC 210.4(B)

Question 22: A central A/C condensing unit nameplate shows a branch-circuit selection current of 24A. What is the maximum overcurrent device allowed on its branch circuit?

30 A
40 A
45 A
60 A

NEC Reference: NEC 440.22(A)

Question 23: What is the minimum size electrical service is required for a single family dwelling unit?

100 amperes
50 amperes
150 amperes
175 amperes

NEC Reference: NEC 230.79(C)

Question 24: When two ground rods are installed as a supplemental electrode system, what is the minimum spacing required between them?

3 feet apart
6 feet apart
8 feet apart
10 feet apart

NEC Reference: NEC 250.53(A)(3)

Question 25: A service drop crosses three areas: Point A over a pedestrian sidewalk at the house entrance (11 ft clearance), Point B over the residential driveway (12 ft), and Point C over an alley used by delivery trucks (16 ft). Which clearance is a violation?

Point A
Point C
Point B
None of them

NEC Reference: NEC 230.24(B)

Question 26: Which of the following must NOT be used as a grounding electrode?

Copper-clad steel rod
Stainless steel rod
Aluminum
Zinc-coated steel rod

NEC Reference: NEC 250.52(B)

Question 27: The NEC defines a continuous load as a load that is expected to continue without interruption for at least:

1 hour
2 hours
3 hours
8 hours

NEC Reference: NEC Article 100 (Definitions)

Question 28: Signs and outline lighting must be at least how many feet above areas accessible to vehicles, unless protected from physical damage?

NEC Reference: NEC 600.9

Question 29: An instantaneous-trip circuit breaker (used for motor branch circuits) has no intentional time delay. What is the main advantage of this type of breaker?

It provides overload protection without a relay
It trips quickly on fault current but does not trip on motor inrush
It can be used without any other motor protection
It is the only type allowed for residential use

NEC Reference: NEC 430.52(C)(3)

Question 30: A pull box has a 3-inch conduit and a 2-inch conduit entering the same wall and making an angle pull. What is the minimum distance from the 3-inch conduit to the opposite wall?

18 inches (6 × 3-inch conduit only)
20 inches (6 × 3-inch plus the 2-inch conduit)
24 inches (8 × 3-inch conduit)
30 inches (6 × (3 + 2))

NEC Reference: NEC 314.28(A)(2)

Question 31: What is permissible voltage drop in percentage for combination of both feeders and branch circuit conductors?

NEC Reference: NEC 215.2(A) Informational Note

Question 32: What size copper service-entrance conductors (75°C terminals) are required for a 250 A continuous 3-phase load?

3/0 AWG
250 kcmil
400 kcmil
2/0 AWG

NEC Reference: NEC 230.42(A), Table 310.16

Question 33: What is the minimum size of the insulated copper equipment grounding conductor for branch circuits at a marina?

No 12 AWG
No 8 AWG
No 10 AWG
No 6 AWG

NEC Reference: NEC 555.37

Question 34: 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 35: What is the maximum ampere rating of a power supply feeder of mobile homes?

25 amperes
50 amperes
75 amperes
45 amperes

NEC Reference: NEC 550.10

Question 36: What is the maximum voltage between conductors for branch circuits supplying luminaires in a dwelling unit?

120 volts
240 volts
150 volts
480 volts

NEC Reference: NEC 210.6

Question 37: Three metal raceways each contain 300 kcmil copper service conductors in parallel. If an individual supply-side bonding jumper is used for each raceway, what is the minimum copper size?

2 AWG
3 AWG
1/0 AWG
1 AWG

NEC Reference: NEC 250.102(C)(2), Table 250.102(C)(1)

Question 38: A 20-ampere branch circuit supplies lighting units and a fastened-in-place appliance. The appliance may not exceed what percent of the branch-circuit rating?

80 %
70 %
50 %
60 %

NEC Reference: NEC 210.23(A)(2)

Question 39: What is the minimum size electrical service required for a single family dwelling unit?

100 amperes
150 amperes
200 amperes
50 amperes

NEC Reference: NEC 230.79(C)

Question 40: Eight 10 AWG THWN conductors (35A ampacity each) are all installed in the same conduit, and all eight are current-carrying. What is the adjusted ampacity for each conductor?

24.5A — 35A × 0.70 (7–9 conductor factor)
28A — 35A × 0.80 (4–6 conductor factor)
31.5A — 35A × 0.90
35A — no derating needed for 10 AWG

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

Question 41: How many 20-ampere, 120-volt branch circuits are required for the general lighting load of a 2,500 sq ft dwelling unit?

NEC Reference: NEC 220.41, 210.11(A)

Question 42: The pool diagram shows a wet-niche luminaire installed in the pool wall 18 inches below the waterline. What is the maximum voltage allowed between conductors for a wet-niche pool luminaire?

120V
150V
240V
No limit — the fixture listing determines the voltage

NEC Reference: NEC 680.23(A)(4)

Question 43: Per NEC 300.4(D), where cables or raceways are installed parallel to framing members, the nearest outside surface of the cable or raceway must be not less than ____ from the nearest edge of the framing member, or be protected by a steel plate.

1 inch
1¼ inches
1½ inches
2 inches

NEC Reference: NEC 300.4(D)

Question 44: The lamp holder connected to a 30 amp branch circuit must be of heavy-duty type.

True
False

NEC Reference: NEC 210.21(A)

Question 45: For a stationary motor rated ____ or less that is normally left running and cannot be damaged by overload or failure to start, the branch-circuit overcurrent device may serve as the controller.

½ horsepower
⅛ horsepower
1 horsepower
5 horsepower

NEC Reference: NEC 430.81

Question 46: 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 47: What is the maximum branch circuit load for a 10 kW single electric range in a dwelling unit?

8 kW
10 KW
7 KW
6 KW

NEC Reference: NEC Table 220.55

Question 48: What is the minimum feeder or service load for cloth dryers in a dwelling unit?

5000 watts
2500 watts
4000 watts
6500 watts

NEC Reference: NEC 220.54

Question 49: The equipotential bonding grid for a permanently installed swimming pool must use a solid copper conductor no smaller than:

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

NEC Reference: NEC 680.26(B)(2)

Question 50: What volume allowance is required for each 12 AWG conductor in a box?

2.25 cu in
2.5 cu in
2.0 cu in
1.75 cu in

NEC Reference: NEC 314.16(B)

Question 51: 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 52: 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 53: 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 54: The grounding electrode conductor (GEC) connecting to a ground rod does not need to be larger than what size copper conductor?

4 AWG copper
6 AWG copper
8 AWG copper
10 AWG copper

NEC Reference: NEC 250.66(A)

Question 55: Which NEC table gives the full-load currents used to size conductors for 3-phase ac induction motors?

Table 310.16
Table 430.248
Table 430.250
Table 430.52

NEC Reference: NEC Table 430.250

Question 56: 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 57: 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 58: A cord and plug device used as disconnecting means for a motor must be rated for ____

Horsepower
Voltage
Resistance
Current

NEC Reference: NEC 430.109(F)

Question 59: Per NEC Table 220.42(A), what is the general lighting unit load for a religious facility (church)?

2.2 VA per sq ft
1 VA per sq ft
3 VA per sq ft
1.4 VA per sq ft

NEC Reference: NEC Table 220.42(A)

Question 60: Underground ducts or conduits must be sealed where they enter a building.

True
False

NEC Reference: NEC 230.8

Question 61: What is the adjusted ampacity of 3/0 copper THWN conductors in a wet location if the raceway contains seven current-carrying conductors?

122.5 amperes
125.5 amperes
140 amperes
133 amperes

NEC Reference: NEC 310.16

Question 62: 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 63: A 480V service has 25,000A available SCC. The minimum AIC rating of OCPDs at the service must be:

10,000A AIC
14,000A AIC
25,000A AIC or higher
No AIC rating required for service equipment

NEC Reference: NEC 110.9

Question 64: Per 445.13, the conductors running from a generator output terminals to the first overcurrent device must be sized at what percentage of the generator nameplate current rating?

100%
115%
125%
150%

NEC Reference: NEC 445.13

Question 65: Multiwire branch circuits are permitted in Class I, Division 1 locations.

True
False

NEC Reference: NEC 501.40

Question 66: What is the maximum support interval for a 2-inch rigid metal conduit (RMC) run?

10 feet
12 feet
16 feet
20 feet

NEC Reference: NEC Table 344.30(B)(2)

Question 67: What is the maximum primary overcurrent protection for a single-phase 480 V to 120 V transformer rated 900 VA, protected on the primary only?

NEC Reference: NEC 450.3

Question 68: The maximum overcurrent device size for a 10 AWG copper conductor used in a branch circuit is:

NEC Reference: NEC 240.4(D)(7)

Question 69: What is the general lighting load for a 6,000 sq ft hospital, before demand factors?

9,600 VA
6,000 VA
12,000 VA
3,000 VA

NEC Reference: NEC Table 220.42(A)

Question 70: A Michigan dwelling has a single required 20-amp laundry branch circuit. Per 220.52(B), what VA value is used for this circuit in the load calculation?

1,500 VA
1,000 VA
2,000 VA
2,500 VA

NEC Reference: NEC 220.52(B)

Question 71: Why does the NEC allow demand factors to reduce a service or feeder calculation below the sum of every connected load?

Because not all connected loads operate at the same time or at full capacity together
Because the NEC wants to reduce the cost of copper for contractors
Because demand factors are only decorative and have no real engineering basis
Because utilities require it for billing purposes only

NEC Reference: NEC Art. 220

Question 72: A contractor terminates threaded rigid metal conduit couplings. Per 344.42, what type of makeup is required?

Threaded couplings made up wrench-tight
Couplings are optional if the conduit is glued
Only compression couplings are permitted for RMC
Hand-tight is sufficient; wrench-tightening is prohibited

NEC Reference: NEC 344.42

Question 73: A Georgia dwelling hallway is 12 feet long. Per 210.52(H), when is a receptacle outlet required in a hallway?

A hallway 10 feet or more in length requires at least one receptacle outlet
Hallways never require any receptacle outlet regardless of length
Only hallways over 30 feet require a receptacle
Receptacle requirements only apply to hallways with closets

NEC Reference: NEC 210.52(H)

Question 74: A Washington homeowner installs a 22 kW standby generator at a one-family dwelling. Per 445.18(C), what emergency shutdown means is required?

A remote emergency stop switch outside the dwelling at a readily accessible location
No shutdown means is required for any generator
A stop switch that must be kept inside a locked shed
Only the utility may shut down a standby generator

NEC Reference: NEC 445.18(C)

Question 75: 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 76: A contractor is sizing conductors for a 15 HP, 230V, three-phase motor. Per Table 430.250, what value must be used for full-load current instead of the nameplate current?

The value listed in Table 430.250 for that horsepower and voltage
The nameplate current stamped on the motor
An estimated value from the motor's physical size
A value chosen at the installer's discretion

NEC Reference: NEC Table 430.250

Question 77: A Washington dairy barn has a concrete floor confinement area with metal equipment accessible to the cows. What does Article 547 generally require to protect the animals from stray voltage?

An equipotential plane, bonded to the grounding electrode system
A wooden floor with no bonding at all
No special requirement applies to agricultural buildings
A separate ungrounded electrical system just for the barn

NEC Reference: NEC 547.44

Question 78: 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

Question 79: Where 10-ft tap conductors leave the enclosure or vault, their ampacity must not be less than what fraction of the overcurrent device protecting the feeder?

1/5
1/10
1/12
1/8

NEC Reference: NEC 240.21

Question 80: A Colorado facility has a dry-type transformer supplying a subpanel. Per 450.9, what is required regarding transformer ventilation?

Ventilating openings must not be obstructed, with adequate air circulation maintained
Dry-type transformers never require any ventilation consideration
Transformers may be installed inside a sealed, airtight enclosure
Ventilation only matters for liquid-filled transformers

NEC Reference: NEC 450.9

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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Journeyman Electrician Practice Test - Full-Length Test 1 (Standard 73Q/4-Hour)

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Journeyman Electrician Practice Test - Full-Length Test 1 (Standard 73Q/4-Hour) — Question List

Question 1: Per NEC Table 220.42(A), what is the general lighting unit load for hotels and motels?

Question 2: What is the minimum general lighting load for a 1,500 sq ft single-family dwelling unit?

Question 3: What must be provided for all working spaces around indoor service equipment, switchboards and panelboards?

Question 4: What is the minimum ampacity of a tap conductor supplying an industrial heating appliance from a 30 A branch circuit?

Question 5: Which of the following is covered by Article 670 (Industrial Machinery)?

Question 6: In Class I locations, which method may NOT be relied on for bonding?

Question 7: What demand factor applies to six household electric clothes dryers?

Question 8: When two or more conductors are installed in parallel to form a single large feeder, each individual conductor must be at least what size?

Question 9: What is the minimum size copper grounding electrode conductor permitted by Table 250.66 (for example, to a ground rod on a small service)?

Question 10: What copper THW conductor (75°C terminals) is needed for a 40 A single-phase continuous-duty motor?

Question 11: 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)?

Question 12: Instruments, pilot lights and potential transformers on switchboards must be supplied by circuits protected by overcurrent devices rated not more than:

Question 13: A 50 HP, 460-volt, 3-phase motor is supplied by THWN conductors. What minimum ampacity must the branch-circuit conductors have?

Question 14: A panelboard contains snap switches rated 30 amperes or less. What is the maximum rating of its overcurrent protection?

Question 15: Dry-type transformers rated not more than ____ are permitted to be installed in hollow spaces of buildings.

Question 16: What is the minimum size copper conductor permitted for open individual overhead conductors operating over 1000 volts?

Question 17: A single-phase, 230-volt motor has a nameplate full-load current of 40 A and no marked service factor or temperature rise. What is the maximum overload protection rating?

Question 18: The diagram shows a 480–208Y/120V transformer feeding a subpanel 40 feet away. The system bonding jumper is installed at both the transformer secondary and at the subpanel neutral-ground bus. What is wrong with this installation?

Question 19: A 4 11/16 × 1½-inch square box has a volume of 29.5 cu in. What is the maximum number of 12 AWG conductors permitted (no devices, clamps or fittings)?

Question 20: Under certain conditions, equipment grounding conductors are counted as current-carrying conductors.

Question 21: The panel diagram shows a 120/240V panel with a multiwire branch circuit. Circuit 1 is a single-pole 20A breaker with a black wire and circuit 3 is a single-pole 20A breaker with a red wire — both share a white neutral wire. Is this panel wiring correct?

Question 22: A central A/C condensing unit nameplate shows a branch-circuit selection current of 24A. What is the maximum overcurrent device allowed on its branch circuit?

Question 23: What is the minimum size electrical service is required for a single family dwelling unit?

Question 24: When two ground rods are installed as a supplemental electrode system, what is the minimum spacing required between them?

Question 25: A service drop crosses three areas: Point A over a pedestrian sidewalk at the house entrance (11 ft clearance), Point B over the residential driveway (12 ft), and Point C over an alley used by delivery trucks (16 ft). Which clearance is a violation?

Question 26: Which of the following must NOT be used as a grounding electrode?

Question 27: The NEC defines a continuous load as a load that is expected to continue without interruption for at least:

Question 28: Signs and outline lighting must be at least how many feet above areas accessible to vehicles, unless protected from physical damage?

Question 29: An instantaneous-trip circuit breaker (used for motor branch circuits) has no intentional time delay. What is the main advantage of this type of breaker?

Question 30: A pull box has a 3-inch conduit and a 2-inch conduit entering the same wall and making an angle pull. What is the minimum distance from the 3-inch conduit to the opposite wall?

Question 31: What is permissible voltage drop in percentage for combination of both feeders and branch circuit conductors?

Question 32: What size copper service-entrance conductors (75°C terminals) are required for a 250 A continuous 3-phase load?

Question 33: What is the minimum size of the insulated copper equipment grounding conductor for branch circuits at a marina?

Question 34: What is the minimum general lighting load of a 110,000 sq ft school?

Question 35: What is the maximum ampere rating of a power supply feeder of mobile homes?

Question 36: What is the maximum voltage between conductors for branch circuits supplying luminaires in a dwelling unit?

Question 37: Three metal raceways each contain 300 kcmil copper service conductors in parallel. If an individual supply-side bonding jumper is used for each raceway, what is the minimum copper size?

Question 38: A 20-ampere branch circuit supplies lighting units and a fastened-in-place appliance. The appliance may not exceed what percent of the branch-circuit rating?

Question 39: What is the minimum size electrical service required for a single family dwelling unit?

Question 40: Eight 10 AWG THWN conductors (35A ampacity each) are all installed in the same conduit, and all eight are current-carrying. What is the adjusted ampacity for each conductor?

Question 41: How many 20-ampere, 120-volt branch circuits are required for the general lighting load of a 2,500 sq ft dwelling unit?

Question 42: The pool diagram shows a wet-niche luminaire installed in the pool wall 18 inches below the waterline. What is the maximum voltage allowed between conductors for a wet-niche pool luminaire?

Question 43: Per NEC 300.4(D), where cables or raceways are installed parallel to framing members, the nearest outside surface of the cable or raceway must be not less than ____ from the nearest edge of the framing member, or be protected by a steel plate.

Question 44: The lamp holder connected to a 30 amp branch circuit must be of heavy-duty type.

Question 45: For a stationary motor rated ____ or less that is normally left running and cannot be damaged by overload or failure to start, the branch-circuit overcurrent device may serve as the controller.

Question 46: 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 47: What is the maximum branch circuit load for a 10 kW single electric range in a dwelling unit?

Question 48: What is the minimum feeder or service load for cloth dryers in a dwelling unit?

Question 49: The equipotential bonding grid for a permanently installed swimming pool must use a solid copper conductor no smaller than:

Question 50: What volume allowance is required for each 12 AWG conductor in a box?

Question 51: An Article 411 low-voltage lighting system operates at 30 volts ac or less. What peak voltage does that correspond to?

Question 52: A panelboard is equipped with snap switches rated 30 amperes or less. Its overcurrent protection must not exceed:

Question 53: 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 54: The grounding electrode conductor (GEC) connecting to a ground rod does not need to be larger than what size copper conductor?

Question 55: Which NEC table gives the full-load currents used to size conductors for 3-phase ac induction motors?

Question 56: What is the minimum ampere rating of short circuit ground fault protective device that can be used for individual motor-compressor?

Question 57: Per 690.12, rapid shutdown of a roof-mounted PV array on a one-family dwelling must reduce voltages outside the array boundary to:

Question 58: A cord and plug device used as disconnecting means for a motor must be rated for ____

Question 59: Per NEC Table 220.42(A), what is the general lighting unit load for a religious facility (church)?

Question 60: Underground ducts or conduits must be sealed where they enter a building.

Question 61: What is the adjusted ampacity of 3/0 copper THWN conductors in a wet location if the raceway contains seven current-carrying conductors?

Question 62: 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?

Question 63: A 480V service has 25,000A available SCC. The minimum AIC rating of OCPDs at the service must be:

Question 64: Per 445.13, the conductors running from a generator output terminals to the first overcurrent device must be sized at what percentage of the generator nameplate current rating?

Question 65: Multiwire branch circuits are permitted in Class I, Division 1 locations.

Question 66: What is the maximum support interval for a 2-inch rigid metal conduit (RMC) run?

Question 67: What is the maximum primary overcurrent protection for a single-phase 480 V to 120 V transformer rated 900 VA, protected on the primary only?

Question 68: The maximum overcurrent device size for a 10 AWG copper conductor used in a branch circuit is:

Question 69: What is the general lighting load for a 6,000 sq ft hospital, before demand factors?