JOURNEYMAN NEC 2023 FULL-LENGTH PRO

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

A full-length, 73-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. Premium — part of Full-Length Pro.

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Frequently Asked Questions

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Most state Journeyman exams have 80–100 questions covering NEC code, wiring methods, branch circuits, motor controls, and load calculations.

Most states require a 70–75% passing score. This practice test uses the same 70% pass threshold so you know where you stand.

Questions are written to the 2023 NEC. Check your state licensing board to confirm which edition your state has adopted.

How to Use This Practice Test

This Journeyman Electrician Practice Test - Full-Length Test 1 (Standard 73Q/4-Hour) has 73 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: 73 multiple-choice, one correct answer each

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

Question 1: What is general lighting unit load per square feet for hotels and guest room?

3 VA
2 VA
2 — VA
1 VA

NEC Reference: NEC 220.12

Question 2: What is the minimum general lightening load required for 1500 square foot single family dwelling unit as permitted by NEC?

4500 VA
4800 VA
3000 VA
1500 VA

NEC Reference: NEC 220.12

Question 3: There shall be at least ............ mm airspace between wall and the door of any cabinet containing current carrying conductors whose operating voltage is less then 250 volts.

6
10.5
14.3
12.7

NEC Reference: NEC 312.11

Question 4: What must be provided for all working spaces above service equipment, switchboards and panel boards?

Illumination
Enclosures or guards
A protective rod
A water line

NEC Reference: NEC 110.26(D)

Question 5: What is the minimum tap conductor ampacity which supply 30 A industrial heating appliances?

10 amperes
20 amperes
15 amperes
18 amperes

NEC Reference: NEC 210.19(A)(4)

Question 6: 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 7: For equipment installed in class I location which of the following type of bonding is required?

A bonding jumper
Double ended jumper
hardly bonded
compression type bonding

NEC Reference: NEC 501.30

Question 8: At which of the following percentage the demand factor for six house hold electric cloth dryers is calculated?

75 %
70 %
85 %
80 %

NEC Reference: NEC 220.54

Question 9: 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 10: Which is the minimum size copper conductor is required for the grounding electrode conductor (GEC) connected to a ground rod

6 AWG
8 AWG
4 AWG
16 AWG

NEC Reference: NEC 250.166(A)

Question 11: Which of the following type of conductor is used to supply a 40 ampere single phase motor used for continuous duty applications?

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

NEC Reference: NEC 310.16

Question 12: Which of the following is the minimum clear workspace that shall be provided to electrical equipment rated at 601 volts that has exposed live parts on its both sides?

3 feet
4 feet
5 feet
6 feet

NEC Reference: NEC 110.34

Question 13: what is the maximum over current device rating that is allowed to placed — to protect panel board instrumentation circuit?

30 amperes
15 amperes
20 amperes
10 amperes

NEC Reference: NEC 408.52

Question 14: A 50 HP 460 volts three phase AC motor is supplied with THWN conductors. Which is of the following is the size of the branch circuit conductors?

81.25 amperes
74.75 amperes
70 amperes
85 amperes

NEC Reference: NEC 430.250

Question 15: What are the minimum heavy duty lamp holders that are permitted on 20 ampere branch circuit operated at 120 volts?

NEC Reference: NEC 220.21(A)

Question 16: What is the maximum rating of panel boards containing 30 ampere or less snap switches?

30 amperes
120 amperes
45 amperes
200 amperes

NEC Reference: NEC 408.36(A)

Question 17: Dry type transformer rated more than ............... are permitted to install in hollow spaces of buildings.

50 KVA
100 KVA
85 KVA
75 KVA

NEC Reference: NEC 450.13(A)

Question 18: What is the the minimum size copper wire that can be used for outside overhead wiring, if the wire carries more than 600 volts?

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

NEC Reference: NEC 225.6(A)(2)

Question 19: A single phase 5ph , 230 volts motor has name plate full load rating of 40 amp. What is its overload protection device rating in amperes?

46 amperes
40 amperes
50 amperes
60 amperes

NEC Reference: NEC 430.32

Question 20: 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 21: A 4 11/16–1 1/2 square box has a volume of 29.5 cu in. Maximum number of 12 AWG conductors permitted per Table 314.16(A) (no devices, clamps, or fittings counted)?

NEC Reference: NEC Table 314.16(A)

Question 22: Under certain conditions equipment grounding conductors are considered as current carrying conductors.

True
False

NEC Reference: NEC 310.15(B)(5)

Question 23: 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 24: 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?

NEC Reference: NEC 440.22(A)

Question 25: 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 26: 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(B)

Question 27: The overhead clearance diagram shows a service drop crossing over different areas. Point A is above a sidewalk at the entrance to a house. Point B is above the driveway at the same house. Point C is above an alley used by delivery trucks. Which clearance is violated?

Point A at 11 feet is a violation — pedestrian entrance needs 10 feet minimum (compliant, actually)
Point C at 16 feet is a violation — truck traffic alley needs 18 feet minimum
Point B at 12 feet is a violation — residential driveway needs 15 feet minimum
No violations — all three points meet their clearance requirements

NEC Reference: NEC 230.24(B)

Question 28: The following materials shall not be used as Grounding electrodes.

Copper
Metal
Aluminum

NEC Reference: NEC 250.52

Question 29: 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 30: The outline lighting system shall be at least .............. feet above the areas accessible to vehicles unless protected from physical damage.

NEC Reference: NEC 600.9

Question 31: 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 32: 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 diameter
24 inches — 8–3-inch conduit
30 inches — 6 — (3 + 2) combined

NEC Reference: NEC 314.28(A)(2)

Question 33: What is permissible voltage drop in percentage for combination of both feeders and branch circuit conductors?

NEC Reference: NEC 215.2(A)(4)

Question 34: What size service entrance conductors are required for 250 A continuous three phase load if the terminals are at ambient temperature of 70 C?

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

NEC Reference: NEC 312.5

Question 35: Which of the following is the minimum size of copper grounding conductor that shall be used in marina?

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

NEC Reference: NEC 550.15

Question 36: What is the minimum volt ampere rating of a 110,000 square foot school?

330 KVA
220 KVA
165 KVA
440 KVA

NEC Reference: NEC 220.12

Question 37: 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 38: What is the maximum voltage applied to — branch circuits that are connected to luminaries in dwelling unit?

120 volts
240 volts
150 volts
480 volts

NEC Reference: NEC 210.6

Question 39: Which of the following is the size of single supply-side bonding jumper is required for three metal raceways, each containing 300 kcmil service conductors?

2 AWG
3 AWG
1/0 AWG
1 AWG

NEC Reference: NEC 250.102(C)(1)

Question 40: Over current protection is not required at the point where the wire size is not over 25 — feet.

True
False

NEC Reference: NEC 240.21

Question 41: A lighting unit is connected on a 20 ampere branch circuit on which a fastened-in place appliance is located. What is the maximum percentage branch circuit rating is permitted on the appliance?

80 %
70 %
50 %
60 %

NEC Reference: NEC 210.23(A)(2)

Question 42: 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 43: 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 44: How many 20 Amp circuits are required for a 2500 sq.ft dwelling unit?

NEC Reference: NEC 220.12

Question 45: 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(B)(1)

Question 46: Per NEC 300.4(D), where cables or raceways are installed parallel to framing members, the nearest outside surface of the cable or raceway shall not be less than _____ inches from the nearest edge of the framing member, or shall be protected from screws and nails by a steel plate.

1 inch
1 — inches
1 — inches
2 inches

NEC Reference: NEC 300.4(D)

Question 47: 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 48: For stationary small motors rated less than .................., the branch circuit over current device — may serve as a controller.

1/2 horsepower
1/ 8 horse power
1 horsepower
5 horse power

NEC Reference: NEC 430.81

Question 49: 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 50: 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 220.555

Question 51: 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 52: 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 53: What is the minimum free space required for No 12 AWG conductor with in the metal box?

2.25
2.5
2
1.75

NEC Reference: NEC 314.16(B)

Question 54: What is the maximum instantaneous voltage that a low voltage lighting system cannot exceed under any load conditions?

34 volts
30 volts
38.2 volts
42.4 volts

NEC Reference: NEC 411.2

Question 55: An orange receptacle in a hospital patient care area is called an isolated-ground receptacle. What is it used for?

To provide GFCI protection for medical equipment
To reduce electrical noise on the ground path for sensitive medical equipment
To mark 20A circuits so staff know they are on the critical branch
To allow the use of 240V equipment at a standard 120V outlet

NEC Reference: NEC 517.16

Question 56: If 30 ampere or less snap switches are equipped in panelboards, they must be protected not in excess of:

30 amperes
150 amperes
200 amperes
225 amperes

NEC Reference: NEC 408.36(A)

Question 57: In which of the following devices the delta breakers cannot be installed?

Panel boards
Conduit boxes
metal boxes
Enclosures

NEC Reference: NEC 408.36

Question 58: 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 59: When the motor nameplate is not available, which NEC table gives the full-load current 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 60: 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 61: 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 62: 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 63: The general lighting load in Volt-ampere/Sq.Foot that a church building requires is ..............

1 Volt-Ampere/ Sq.Foot
2 Volt-Ampere/ Sq.Foot
3 Volt-Ampere/ Sq.Foot
4 Volt-Ampere/ Sq.Foot

NEC Reference: NEC 220.12

Question 64: The ungrounded ducts or conduits should be sealed before entering buildings.

True
False

NEC Reference: NEC 230.8

Question 65: What is the adjustment ampacity of a 3/0 THWN conductors in a wet location, if the raceway contains seven conductors in it?

122.5 amperes
125.5 amperes
140 amperes
133 amperes

NEC Reference: NEC 310.15(B)(16)

Question 66: 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 67: 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 68: 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 69: Mutli-wire branch circuits shall be permitted in class I division I locations.

True
False

NEC Reference: NEC 501.40

Question 70: 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 71: What is the primary protection required for a 2 wire 480V to 120 V Transformer rated at 900 VA?

NEC Reference: NEC 450.3

Question 72: The maximum overcurrent device size for a 10 AWG copper conductor used in a branch circuit is:

NEC Reference: NEC 240.4(D)(1)

Question 73: What is the general lighting unit load for a 6000 square foot hospital?

12000 Volt-Ampere
6000 Volt-Ampere
18000 Volt-Ampere
3000 Volt-Ampere

NEC Reference: NEC 220.12

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: What is general lighting unit load per square feet for hotels and guest room?

Question 2: What is the minimum general lightening load required for 1500 square foot single family dwelling unit as permitted by NEC?

Question 3: There shall be at least ............ mm airspace between wall and the door of any cabinet containing current carrying conductors whose operating voltage is less then 250 volts.

Question 4: What must be provided for all working spaces above service equipment, switchboards and panel boards?

Question 5: What is the minimum tap conductor ampacity which supply 30 A industrial heating appliances?

Question 6: Which of the following is covered by Article 670 (Industrial Machinery)?

Question 7: For equipment installed in class I location which of the following type of bonding is required?

Question 8: At which of the following percentage the demand factor for six house hold electric cloth dryers is calculated?

Question 9: 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 10: Which is the minimum size copper conductor is required for the grounding electrode conductor (GEC) connected to a ground rod

Question 11: Which of the following type of conductor is used to supply a 40 ampere single phase motor used for continuous duty applications?

Question 12: Which of the following is the minimum clear workspace that shall be provided to electrical equipment rated at 601 volts that has exposed live parts on its both sides?

Question 13: what is the maximum over current device rating that is allowed to placed — to protect panel board instrumentation circuit?

Question 14: A 50 HP 460 volts three phase AC motor is supplied with THWN conductors. Which is of the following is the size of the branch circuit conductors?

Question 15: What are the minimum heavy duty lamp holders that are permitted on 20 ampere branch circuit operated at 120 volts?

Question 16: What is the maximum rating of panel boards containing 30 ampere or less snap switches?

Question 17: Dry type transformer rated more than ............... are permitted to install in hollow spaces of buildings.

Question 18: What is the the minimum size copper wire that can be used for outside overhead wiring, if the wire carries more than 600 volts?

Question 19: A single phase 5ph , 230 volts motor has name plate full load rating of 40 amp. What is its overload protection device rating in amperes?

Question 20: 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 21: A 4 11/16–1 1/2 square box has a volume of 29.5 cu in. Maximum number of 12 AWG conductors permitted per Table 314.16(A) (no devices, clamps, or fittings counted)?

Question 22: Under certain conditions equipment grounding conductors are considered as current carrying conductors.

Question 23: 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 24: 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 25: What is the minimum size electrical service is required for a single family dwelling unit?

Question 26: When two ground rods are installed as a supplemental electrode system, what is the minimum spacing required between them?

Question 27: The overhead clearance diagram shows a service drop crossing over different areas. Point A is above a sidewalk at the entrance to a house. Point B is above the driveway at the same house. Point C is above an alley used by delivery trucks. Which clearance is violated?

Question 28: The following materials shall not be used as Grounding electrodes.

Question 29: The NEC defines a continuous load as a load that is expected to continue without interruption for at least:

Question 30: The outline lighting system shall be at least .............. feet above the areas accessible to vehicles unless protected from physical damage.

Question 31: 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 32: 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 33: What is permissible voltage drop in percentage for combination of both feeders and branch circuit conductors?

Question 34: What size service entrance conductors are required for 250 A continuous three phase load if the terminals are at ambient temperature of 70 C?

Question 35: Which of the following is the minimum size of copper grounding conductor that shall be used in marina?

Question 36: What is the minimum volt ampere rating of a 110,000 square foot school?

Question 37: What is the maximum ampere rating of a power supply feeder of mobile homes?

Question 38: What is the maximum voltage applied to — branch circuits that are connected to luminaries in dwelling unit?

Question 39: Which of the following is the size of single supply-side bonding jumper is required for three metal raceways, each containing 300 kcmil service conductors?

Question 40: Over current protection is not required at the point where the wire size is not over 25 — feet.

Question 41: A lighting unit is connected on a 20 ampere branch circuit on which a fastened-in place appliance is located. What is the maximum percentage branch circuit rating is permitted on the appliance?

Question 42: What is the minimum size electrical service required for a single family dwelling unit?

Question 43: 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 44: How many 20 Amp circuits are required for a 2500 sq.ft dwelling unit?

Question 45: 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 46: Per NEC 300.4(D), where cables or raceways are installed parallel to framing members, the nearest outside surface of the cable or raceway shall not be less than _____ inches from the nearest edge of the framing member, or shall be protected from screws and nails by a steel plate.

Question 47: The lamp holder connected to a 30 amp branch circuit must be of heavy-duty type.

Question 48: For stationary small motors rated less than .................., the branch circuit over current device — may serve as a controller.

Question 49: 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 50: What is the maximum branch circuit load for a 10 kW single electric range in a dwelling unit?

Question 51: What is the minimum feeder or service load for cloth dryers in a dwelling unit?

Question 52: The equipotential bonding grid for a permanently installed swimming pool must use a solid copper conductor no smaller than:

Question 53: What is the minimum free space required for No 12 AWG conductor with in the metal box?

Question 54: What is the maximum instantaneous voltage that a low voltage lighting system cannot exceed under any load conditions?

Question 55: An orange receptacle in a hospital patient care area is called an isolated-ground receptacle. What is it used for?

Question 56: If 30 ampere or less snap switches are equipped in panelboards, they must be protected not in excess of:

Question 57: In which of the following devices the delta breakers cannot be installed?

Question 58: The grounding electrode conductor (GEC) connecting to a ground rod does not need to be larger than what size copper conductor?

Question 59: When the motor nameplate is not available, which NEC table gives the full-load current for 3-phase AC induction motors?

Question 60: What is the minimum ampere rating of short circuit ground fault protective device that can be used for individual motor-compressor?

Question 61: 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 62: A cord and plug device used as disconnecting means for a motor must be rated for ..................

Question 63: The general lighting load in Volt-ampere/Sq.Foot that a church building requires is ..............

Question 64: The ungrounded ducts or conduits should be sealed before entering buildings.

Question 65: What is the adjustment ampacity of a 3/0 THWN conductors in a wet location, if the raceway contains seven conductors in it?

Question 66: 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 67: A 480V service has 25,000A available SCC. The minimum AIC rating of OCPDs at the service must be:

Question 68: 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 69: Mutli-wire branch circuits shall be permitted in class I division I locations.

Question 70: What is the maximum support interval for a 2-inch rigid metal conduit (RMC) run?

Question 71: What is the primary protection required for a 2 wire 480V to 120 V Transformer rated at 900 VA?