2024 Residential Electrical Inspector – Practice Quiz (Untimed)

Residential Electrical Inspector Exam Prep (Product Image)

2024 Residential Electrical Inspector (E1) (Untimed)

60 Questions

2 Hours

1 / 60

1. What is the minimum size bare copper conductor permitted for a concrete-encased electrode?

A) 6 AWG

B) 8 AWG

C) 10 AWG

D) 4 AWG

2 / 60

2. Which of the following is permitted within the 6-foot dedicated indoor panelboard space?

A) Piping and ducts foreign to the electrical installation

B) Suspended ceilings with removable panels

C) Leak protection apparatus directly above the panelboard without protection

D) Any foreign equipment, provided it is less than 6 inches in diameter

3 / 60

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

A) Separate electrodes may be installed when convenient

B) Separate grounding electrodes are required

C) The same grounding electrode must be used

D) Only the largest service needs an electrode

4 / 60

4. What is the minimum conductor size (AWG) for a 30-amp branch circuit using aluminum or copper-clad aluminum conductors?

A) 12 AWG

B) 8 AWG

C) 6 AWG

D) 10 AWG

5 / 60

5. What is the maximum rating of the next higher standard overcurrent device permitted above the ampacity of the conductors?

A) 200 amperes

B) 800 amperes

C) 400 amperes

D) 600 amperes

6 / 60

6. Receptacle assemblies and GFCI receptacle assemblies installed in work surfaces must be ______.

A) Listed for either countertop or work surface applications

B) Listed as suitable for damp locations

C) Listed for countertop applications only

D) Listed for work surface applications only

7 / 60

7. For a panelboard rated at 225 amperes or less and designed to contain not more than 42 overcurrent devices, what is the minimum top or bottom wire-bending space required for two wires per terminal sized 250 kcmil?

A) 3 1/2 inches (88.9 mm)

B) 4 1/2 inches (114 mm)

C) 6 inches (152 mm)

D) 5 inches (127 mm)

8 / 60

8. Which of the following best defines ‘Overcurrent’?

A) Any current during start-up of a motor

B) Current that flows only to ground

C) Any current in excess of the equipment rating or conductor ampacity

D) A temporary spike in voltage

9 / 60

9. Boxes enclosing devices or utilization equipment supplied by 8, 6, or 4 AWG conductors must have a minimum internal depth of:

A) 3 1/2 inches (89 mm)

B) 2 1/4 inches (57 mm)

C) 4 inches (102 mm)

D) 2 1/16 inches (52.4 mm)

10 / 60

10. Luminaires, lampholders, and lamps must be installed so that ______.

A) Energized parts are never permitted to be exposed under any condition

B) Energized parts are not normally exposed to contact

C) Energized parts are exposed only when the fixture is removed

D) Energized parts are accessible for maintenance

11 / 60

11. What is the minimum clearance required in any direction to a diving platform for service-drop conductors operating at 20 kV to ground?

A) 18 feet

B) 25 feet

C) 14.5 feet

D) 17 feet

12 / 60

12. When cables enter or exit conduit used only for support or protection against physical damage, what is required at the end of the conduit?

A) An access panel

B) A junction box

C) A conduit body

D) A fitting to protect the cable from abrasion

13 / 60

13. The minimum size AWG conductor for a 30-amp circuit using copper conductors is:

A) 8 AWG

B) 10 AWG

C) 14 AWG

D) 12 AWG

14 / 60

14. What is the minimum size copper conductor permitted for feeders and branch circuits?

A) 16 AWG

B) 12 AWG

C) 14 AWG

D) 18 AWG

15 / 60

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

A) 310.10(B)

B) 250.64

C) 310.16

D) E3406.5

16 / 60

16. True or False: Raceways embedded in masonry are not required to be arranged to drain.

A) True

B) False

17 / 60

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

A) 15 or 20 amps

B) Any rating

C) 20 amps only

D) 15 amps only

18 / 60

18. Can a multiwire branch circuit be considered multiple circuits?

A) Only for lighting

B) Yes

C) No

D) Only for appliances

19 / 60

19. What is the allowable ampacity of a 6 AWG copper conductor with 90°C insulation?

A) 65 amps

B) 70 amps

C) 75 amps

D) 55 amps

20 / 60

20. 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) 115 percent of largest motor load plus sum of other loads

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

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

21 / 60

21. Under what condition are dimmer controls permitted for interior stairway lighting outlets?

A) Only when installed at the bottom landing

B) Only when stairway risers exceed twelve

C) Dimmer controls are never permitted

D) When the control devices provide dimming to maximum brightness at each control location

22 / 60

22. When calculating feeder loads, which value is used for the heating and cooling portion of the load?

A) The average of heating and cooling loads

B) The smaller of heating or cooling loads

C) The larger of heating or cooling loads

D) The sum of both heating and cooling loads

23 / 60

23. Boxes enclosing devices or utilization equipment supplied by 14 AWG or smaller conductors must have a minimum internal depth of:

A) 2 1/16 inches (52.4 mm)

B) 15/16 inch (23.8 mm)

C) 1 3/16 inches (30.2 mm)

D) 13/16 inch (20.6 mm)

24 / 60

24. If multiple sets of service-entrance conductors supply a building, how is the size of the grounding electrode conductor determined?

A) By averaging the conductor sizes

B) By the largest conductor in any set

C) By the largest sum of the areas of corresponding conductors of each set

D) By the smallest conductor in any set

25 / 60

25. Flexible cords are permitted to be installed in raceways:

A) Always permitted by the code

B) Shall not be installed in raceways unless otherwise permitted by the code

C) Never permitted by the code

D) Is only permitted in exterior locations

26 / 60

26. When receptacles are installed in a crawl space at or below grade level, what type of protection is required?

A) GFCI protection

B) Both AFCI and GFCI

C) No protection required

D) AFCI protection only

27 / 60

27. Metal components of a concrete-encased electrode shall be encased by at least how many inches of concrete?

A) 1 inch

B) 2.5 inches

C) 1.5 inches

D) 2 inches

28 / 60

28. The point of attachment for overhead service conductors must be located not less than how many feet above finished grade?

A) 12 feet

B) 14 feet

C) 8 feet

D) 10 feet

29 / 60

29. Which of the following types of switches are not permitted to be reconditioned?

A) Only molded-case switches

B) Lighting, dimmer, and electronic control switches

C) Snap switches of any type

D) All of the above

30 / 60

30. Which of the following mounting methods is not permitted for electrical equipment?

A) Fastening to a secure wall surface with listed anchors

B) Bolting directly to a structural support member

C) Mounting with wooden plugs driven into masonry or concrete

D) Securing to a metal frame with approved hardware

31 / 60

31. Where a required receptacle cannot be installed in the wall area directly above a countertop, what does the code allow?

A) Alter the installation to accommodate required receptacles

B) Omit the receptacle entirely

C) Install a floor receptacle instead

D) Install it as close as practicable to the countertop area to be served

32 / 60

32. What is the minimum conductor size (AWG) for a 20-amp branch circuit using copper conductors?

A) 10 AWG

B) 14 AWG

C) 8 AWG

D) 12 AWG

33 / 60

33. A recessed incandescent luminaire with a completely enclosed light source shall have a minimum clearance of:

A) 9 inches

B) 18 inches

C) 12 inches

D) 6 inches

34 / 60

34. The ampacity of conductors supplying multimotor and combination load equipment shall be not less than what value?

A) Maximum circuit breaker rating

B) 80 percent of marked rating

C) Nameplate watts

D) Minimum circuit ampacity marked on the equipment

35 / 60

35. Which of the following luminaires installed directly over an indoor spa at less than 7 feet 6 inches above the maximum water level would be permitted if protected by a GFCI?

A) Recessed luminaire with glass lens and metallic trim

B) Recessed luminaire with plastic lens and nonmetallic trim

C) Surface-mounted luminaire with open bulb and metallic body

D) Surface-mounted luminaire with glass globe and nonmetallic body

36 / 60

36. Color coding of switch connection conductors shall comply with which of the following?

A) Section E3406.7

B) Section E3908.13

C) Section E4001.5

D) Section E3407.3

37 / 60

37. A 15- or 20-ampere branch circuit shall be permitted to supply which of the following?

A) Only cord-and-plug-connected utilization equipment not fastened in place

B) Only utilization equipment

C) Lighting outlets, lighting units, or other utilization equipment, or any combination of them

D) Only lighting outlets

38 / 60

38. Which of the following insulation types is not permitted for individual current-carrying conductors under the IRC?

A) XHHW-2

B) THHN

C) NM-B

D) USE-2

39 / 60

39. What demand factor applies to electric space-heating units where there are four or more separately controlled units?

A) 65 percent

B) 40 percent

C) 100 percent

D) 25 percent

40 / 60

40. If reconditioned equipment does not meet the listing or field labeling options specified in the code, the authority having jurisdiction (AHJ) is permitted to:

A) Require the original equipment manufacturer to inspect the equipment on site

B) Approve the equipment without any verification or documentation

C) Approve the reconditioned equipment if provided with documentation of the changes to the product

D) Allow the equipment to remain in service without documentation

41 / 60

41. Receptacle assemblies and GFCI receptacle assemblies installed in countertop surfaces must be ______.

A) Listed for work surface applications

B) Listed for countertop applications

C) Listed as suitable for damp locations

D) Listed for either countertop or work surface applications

42 / 60

42. Branch circuits supplying utilization equipment over 1,440 volt-amperes or 1/4 horsepower and greater shall have a nominal voltage rating of

A) 120 volts only

B) 120 or 240 volts

C) Nominal voltage is not limited

D) 240 volts only

43 / 60

43. What is the minimum diameter of rebar for a concrete-encased electrode?

A) 1/2 inch

B) 3/4 inch

C) 3/8 inch

D) 5/8 inch

44 / 60

44. Service-entrance cable must be equipped with a service head or formed into what in an approved manner?

A) Gooseneck

B) Weatherhead

C) Bushed opening

D) Drip loop

45 / 60

45. 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) 2/0 AWG

C) 1/0 AWG

D) 1 AWG

46 / 60

46. Flexible cords and cables are permitted to substitute for the fixed wiring of a structure.

A) True

B) False

47 / 60

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

A) 115 amps

B) 110 amps

C) 85 amps

D) 100 amps

48 / 60

48. A service with two to six separate enclosures, each with a single main service disconnect, is:

A) Not permitted

B) Only allowed with utility approval

C) Permitted

D) Permitted only in multi-family buildings

49 / 60

49. What is the minimum short-circuit current rating service equipment must be suitable for?

A) 20,000 amperes

B) 15,000 amperes

C) 10,000 amperes

D) 5,000 amperes

50 / 60

50. Screwless conductor push-in terminals on snap switches shall be installed on branch circuits not greater than how many amperes?

A) 15 amperes

B) 20 amperes

C) 10 amperes

D) 30 amperes

51 / 60

51. In an indoor pool location, a luminaire is required to be provided with GFCI protection when installed 10 ft above the maximum water level of the pool.

A) True

B) False

52 / 60

52. A service with two to six separate panelboards, each with a single main service disconnect, is:

A) Not permitted

B) Only allowed in commercial buildings

C) Permitted

D) Requires special inspection

53 / 60

53. When flexibility is necessary after installation, what is the maximum distance in inches from a box or termination for 3-inch trade size Flexible Metal Conduit (FMC)?

A) 60 inches

B) 72 inches

C) 36 inches

D) 48 inches

54 / 60

54. What is the allowable ampacity of an 8 AWG aluminum conductor with 60°C insulation?

A) 35 amps

B) 50 amps

C) 40 amps

D) 45 amps

55 / 60

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

A) 80 amperes

B) 100 amperes

C) 60 amperes

D) 50 amperes

56 / 60

56. Which of the following is true regarding aluminum electrodes used as grounding electrodes?

A) They are not permitted

B) They are permitted as a rod or plate electrode

C) They are permitted only if listed for direct burial

D) They are permitted only in above-ground installations

57 / 60

57. When liquid-tight flexible metal conduit of trade size 1 inch is used as an equipment grounding conductor (EGC), the maximum rating of the overcurrent device protecting the circuit conductors contained within it shall not exceed:

A) 60 amperes

B) 100 amperes

C) 40 amperes

D) 20 amperes

58 / 60

58. What is the adjustment factor when more than 20 Type MC cables without an overall outer jacket are stacked or bundled longer than 24 inches without spacing, such as 25 cables?

A) 50%

B) 40%

C) 60%

D) 45%

59 / 60

59. Lampholders installed in damp locations must be:

A) Provided with a waterproof barrier

B) Listed for use in damp locations only

C) Listed for use in outdoor locations

D) Listed for damp locations or listed for wet locations

60 / 60

60. Terminals of 15- and 20-ampere receptacles not marked CO/ALR shall be used with which conductors?

A) Copper and copper-clad aluminum conductors only

B) 15 amps with 14 AWG copper or aluminum solid

C) Not greater than 15 amps with 14 AWG stranded copper

D) Copper, aluminum, and copper-clad aluminum conductors

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.”