2024 Residential Electrical Inspector – Practice Quiz (Untimed)

Residential Electrical Inspector Exam Prep (Product Image)

2024 Residential Electrical Inspector (E1) (Untimed)

60 Questions

2 Hours

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1. What is the minimum copper equipment grounding conductor size required for a 400-ampere circuit?

A) 1 AWG

B) 4 AWG

C) 2 AWG

D) 3 AWG

2 / 60

2. Flexible cords used for connection of fixed or stationary pool equipment (other than underwater luminaires) shall not exceed ____ ft in length, except for storable pools.

A) 3 ft

B) 6 ft

C) 8 ft

D) 10 ft

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3. In the areas specified in Section E3901.1, what type of receptacles are required for 15- and 20-ampere, 125- and 250-volt nonlocking-type receptacles?

A) Listed weather-resistant receptacles

B) Listed extra-duty receptacles

C) Listed locking-type receptacles

D) Listed tamper-resistant receptacles

4 / 60

4. What is the allowable ampacity of a No. 8 AWG aluminum conductor with 75°C insulation?

A) 45 amps

B) 35 amps

C) 40 amps

D) 50 amps

5 / 60

5. When installed within the zone of a tub or shower, a single receptacle for an electronic toilet or personal hygiene device shall be ______ and not be located ______.

A) Accessible; in the space between the toilet and the bathtub

B) Readily accessible; located within 6 inches of the tub rim

C) Readily accessible; in the space between the toilet and the bathtub or shower

D) Accessible; behind the toilet

6 / 60

6. Where must an overcurrent device be installed to protect ungrounded branch-circuit and feeder conductors?

A) At the midpoint of the run

B) At the end of the circuit

C) At the service panel

D) At the point where the conductors receive their supply

7 / 60

7. The ballast of a fluorescent luminaire installed indoors must be provided with ______.

A) External protective housing

B) External thermal isolation

C) Integral thermal protection

D) Thermal insulation installed above the luminaire

8 / 60

8. A 3 × 2 × 3 1/2 device box may contain a maximum of how many 12 AWG conductors?

A) 9

B) 12

C) 8

D) 10

9 / 60

9. What is the allowable ampacity of a 3 AWG copper conductor with 75°C insulation?

A) 100 amps

B) 115 amps

C) 85 amps

D) 110 amps

10 / 60

10. What is the allowable ampacity of a 500 kcmil copper conductor with 75°C insulation?

A) 310 amps

B) 260 amps

C) 380 amps

D) 350 amps

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11. Bare aluminum grounding electrode conductors shall **not** be:

A) Installed in direct contact with concrete

B) Installed above grade

C) Installed in intermediate metal conduit

D) Installed in a metal raceway

12 / 60

12. What is the minimum clearance required for a recessed LED luminaire with a completely enclosed light source in a closet?

A) 12 inches

B) 6 inches

C) No limit if less than 25 watts

D) No limit if less than 10 watts

13 / 60

13. When calculating feeder loads, what percentage is applied to the first 3,000 VA or less of lighting and receptacle load?

A) 25%

B) 35%

C) 100%

D) 50%

14 / 60

14. Which best defines ‘Service Point’?

A) The point where the grounding electrode connects to earth

B) The point where the branch circuit connects to a load

C) The point of connection between the serving utility and premises wiring

D) The point inside the panel where the neutral is bonded

15 / 60

15. Where a disconnecting means is required to be lockable, which of the following is true regarding the locking provisions?

A) They must remain in place with or without the lock installed

B) They must remain in place only while the lock is installed

C) They are permitted to be removed at any time

D) They must be factory-installed and non-removable

16 / 60

16. If separate services supply a building, which is true regarding grounding electrodes?

A) The same grounding electrode must be used

B) Separate grounding electrodes are required

C) Separate electrodes may be installed when convenient

D) Only the largest service needs an electrode

17 / 60

17. When service conductors serve 100 percent of the dwelling unit load, the load shall be computed in accordance with:

A) Table E3602.2

B) Table E3501.5

C) Table E3704.2

D) Table E3902.11

18 / 60

18. What is the maximum overcurrent protection device rating for a 12 AWG copper conductor?

A) 30A

B) 20A

C) 15A

D) 25A

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19. When using a disconnect for permanently installed heating equipment with motors rated at not over 1/8 horsepower and provided with supplementary overcurrent protection, it must be within sight of which of the following?

A) The branch-circuit overcurrent device

B) The supplementary overcurrent device

C) The heating equipment

D) Both the supplementary overcurrent device and the heating equipment

20 / 60

20. What is the minimum length of rebar or conductor required for a concrete-encased electrode?

A) 10 feet

B) 18 feet

C) 20 feet

D) 15 feet

21 / 60

21. The indoor dedicated space for a panelboard must equal the width and depth of the panelboard and extend from the floor to:

A) 6 feet above the panelboard or to the structural ceiling, whichever is lower

B) 6.5 feet above the panelboard or to the structural ceiling, whichever is lower

C) 5 feet above the panelboard or to the structural ceiling, whichever is lower

D) 8 feet above the panelboard or to the structural ceiling, whichever is lower

22 / 60

22. If service conductors serve less than 100 percent of the dwelling unit load, how is the load calculated?

A) As per Table E3602.2

B) By NEC Article 300

C) By utility estimate

D) As per feeder calculation rules in Chapter 37

23 / 60

23. What color background and text is required for outdoor emergency disconnect labels?

A) Red background with white text

B) Yellow background with black text

C) Black background with yellow text

D) White background with red text

24 / 60

24. Liquid-tight flexible metal conduit is permitted to serve as an equipment grounding conductor (EGC) only if which of the following conditions is met?

A) The conduit contains only branch-circuit conductors

B) The conduit is encased in 2 inches of concrete

C) The conduit is terminated in listed fittings

D) The conduit does not exceed 10 feet in length

25 / 60

25. When determining interrupting ratings, a fault is assumed to occur between which conductors?

A) Between two or more of the circuit conductors or between any circuit conductor and the equipment grounding conductors

B) Between the grounded (neutral) conductor and the equipment grounding conductor only

C) Between the grounded (neutral) conductor and one ungrounded conductor only

D) Between two ungrounded conductors only

26 / 60

26. In an indoor spa or hot tub area, luminaires or ceiling-suspended paddle fans located above the spa or hot tub and not provided with GFCI protection must be installed at a minimum height of how many feet above the maximum water level?

A) 10 feet

B) 7 feet 6 inches

C) 12 feet

D) 7 feet

27 / 60

27. Which method is permitted for splicing a grounding electrode conductor?

A) Exothermic weld

B) Lug nut

C) Any of these methods

D) Split bolt

28 / 60

28. Which of the following is not permitted? A grounded conductor shall not be connected to normally noncurrent-carrying metal parts of equipment, to equipment grounding conductor(s), or be reconnected to ground on the load side of the service disconnecting means.

A) To equipment grounding conductor(s)

B) To normally noncurrent-carrying metal parts of equipment

C) Reconnected to ground

D) All of the above

29 / 60

29. For a 10-amp branch circuit using copper conductors, what is the maximum load in amperes?

A) 8A

B) 15A

C) 10A

D) 12A

30 / 60

30. Which of the following is permitted to be installed in the same raceway or cable as service conductors?

A) Communications cables

B) Branch circuit conductors

C) Feeder conductors

D) Grounding electrode conductors

31 / 60

31. Which of the following statements about using an equipment grounding conductor (EGC) as a grounding electrode conductor (GEC) is correct?

A) An EGC may always be used as a GEC without restriction

B) A wire-type EGC may be used as both if installed in compliance with all applicable requirements for each

C) An EGC may be used as a GEC only if connected directly to the service neutral

D) An EGC may never be used as a GEC, even if installed per code

32 / 60

32. Overhead service conductors shall have a clearance of not less than how many feet from the sides and bottom of windows that do not open?

A) 2 feet

B) 1 foot

C) 0 feet

D) 3 feet

33 / 60

33. What is the minimum length required for rod and pipe electrodes used as grounding electrodes?

A) 10 feet (3048 mm)

B) 8 feet (2438 mm)

C) 6 feet (1829 mm)

D) 7 feet (2134 mm)

34 / 60

34. When derating Type SE cable conductors, the final adjusted ampacity must not exceed the ampacity for what temperature rating?

A) 105°C (221°F)

B) 60°C (140°F)

C) 90°C (194°F)

D) 75°C (167°F)

35 / 60

35. What is the minimum size aluminum or copper-clad aluminum conductor permitted for feeders and branch circuits?

A) 16 AWG

B) 12 AWG

C) 10 AWG

D) 14 AWG

36 / 60

36. A 20-ampere receptacle directly connected to aluminum conductors must be marked as which of the following?

A) AL-CU

B) CU only

C) CO/ALR

D) CU/ALR

37 / 60

37. If a 30-ampere branch circuit operating at 120 volts is supplying cord-and-plug-connected utilization equipment, the rating of any one piece of equipment shall not exceed how many watts?

A) 2880 watts

B) 3000 watts

C) 2400 watts

D) 2500 watts

38 / 60

38. The heating elements of an electric spa or hot tub water heater shall be subdivided into loads not exceeding how many amperes?

A) 40 amperes

B) 50 amperes

C) 60 amperes

D) 48 amperes

39 / 60

39. How many Class B strands are in a 16 AWG copper conductor?

A) 16

B) 10

C) 37

D) 26

40 / 60

40. What is the demand factor applied to the first 10,000 volt-amperes of calculated load?

A) 50 percent

B) 100 percent

C) 25 percent

D) 40 percent

41 / 60

41. What is the maximum overcurrent protection device rating for a 14 AWG copper conductor?

A) 20A

B) 15A

C) 30A

D) 25A

42 / 60

42. Which of the following best describes when exposed metal parts of fixed equipment must be connected to the equipment grounding conductor?

A) Where located in a wet or damp location and not isolated

B) Where separated by a grounded barrier

C) Where located in a dry location and isolated

D) Where located in a wet or damp location but isolated

43 / 60

43. When conductors are spliced for direct burial, what is required?

A) Splices must be made with any UL-listed connector and wrapped with at least three layers of electrical tape

B) Splices may be made using any method if enclosed in a rigid nonmetallic conduit section underground

C) Splices must be made with devices listed for the purpose and specifically listed for direct burial applications

D) Splices are permitted using standard wire connectors if coated with silicone sealant

44 / 60

44. Outlet boxes mounted in ceilings of habitable rooms in acceptable locations for installation of paddle fans must either be listed for sole support of the fan or:

A) Comply with Section E4905.6 and allow access to structural framing

B) Comply with Section E3905.7 and allow access to structural framing

C) Comply with Section E3905.6 and allow access to structural framing

D) Be marked only for luminaire use

45 / 60

45. When more than one ampacity could apply to a circuit length, which value must be used?

A) Any of these

B) The highest value

C) The lowest value

D) The average value

46 / 60

46. The required small-appliance branch circuits shall serve receptacle outlets in all of the following areas except:

A) Kitchen

B) Breakfast room

C) Pantry

D) Exterior receptacle on a kitchen wall

47 / 60

47. A copper grounding electrode conductor for service entrance conductors over 350 kcmil through 600 kcmil shall be no smaller than what size?

A) 2 AWG

B) 1/0 AWG

C) 1 AWG

D) 2/0 AWG

48 / 60

48. In addition to the required small-appliance branch circuits in kitchens and dining areas, additional receptacle outlets for specific appliances may be supplied from what minimum branch circuit rating?

A) 15 amperes

B) 10 amperes

C) 20 amperes

D) 25 amperes

49 / 60

49. For circuits supplying loads consisting of motor-operated utilization equipment that is fastened in place and that has a motor larger than 1/8 horsepower in combination with other loads, the total calculated load shall be based on

A) 125 percent of total load

B) 125 percent of largest motor load plus sum of other loads

C) 100 percent of largest motor load plus sum of other loads

D) 115 percent of largest motor load plus sum of other loads

50 / 60

50. Overhead service conductors shall have a clearance of not less than how many feet from the sides and bottom of windows that open?

A) 5 feet

B) 4 feet

C) 6 feet

D) 3 feet

51 / 60

51. The clothes-closet storage space extends vertically to what height from the closet floor or highest clothes-hanging rod?

A) 7 feet

B) 8 feet

C) 5 feet

D) 6 feet

52 / 60

52. At an ambient temperature of 46–50°C, what is the correction factor for a conductor rated at 75°C?

A) 0.58

B) 0.67

C) 0.82

D) 0.75

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53. What is the minimum ampacity for ungrounded conductors in all other installations?

A) 100 amperes

B) 60 amperes

C) 80 amperes

D) 50 amperes

54 / 60

54. A floor receptacle can only be counted as part of the required receptacle outlets if it is located within how many inches of the wall?

A) 30 inches

B) 24 inches

C) 12 inches

D) 18 inches

55 / 60

55. The input leads of a Class 2 transformer that are permitted to be smaller than 14 AWG must have insulation rated at not less than how many volts?

A) 600 volts

B) 300 volts

C) 500 volts

D) 450 volts

56 / 60

56. What condition must be met for conduit bodies to contain splices, taps, or devices?

A) They must be factory installed

B) They must be marked by the manufacturer with their cubic inch capacity

C) They must be larger than 100 cubic inches

D) Splices are not permitted within conduit bodies

57 / 60

57. The grounded conductor of a luminaire must be connected to:

A) The screw shell of the lampholder

B) The luminaire housing

C) The screw shell and housing of the lampholder

D) The ungrounded circuit terminal

58 / 60

58. What is the maximum receptacle rating permitted on a 20-amp branch circuit?

A) 20 amps only

B) Any rating

C) 15 amps only

D) 15 or 20 amps

59 / 60

59. When determining required receptacle outlet locations, wall spaces that are at least how wide must be included in the spacing calculation?

A) 24 inches

B) 30 inches

C) 36 inches

D) 18 inches

60 / 60

60. Service-entrance conductors entering or on the exterior of buildings must be insulated in accordance with which section?

A) 310.16

B) 250.64

C) 310.10(B)

D) E3406.5

Your score is

2024 Residential Electrical Inspector – Practice Quiz (Untimed)

“This untimed practice quiz simulates the ICC exam format, giving you full exposure to real-style questions while allowing unlimited time to navigate, learn, and build confidence without time pressure.”