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Inspector 1E Ultimate Exam
Question 1. Which document must the inspector verify before beginning a residential electrical inspection in Florida? A) Owner’s warranty booklet B) Electrical permit application and approved plans C) Contractor’s insurance policy D) Manufacturer’s installation instructions Answer: B Explanation: The inspector must confirm that a valid electrical permit and the approved construction drawings are on file to ensure the work is authorized and follows the code. Question 2. In applying Ohm’s Law for load calculations, what is the correct formula to determine current (I) when voltage (V) and resistance (R) are known? A) I = V × R B) I = V / R C) I = R / V D) I = V² / R Answer: B Explanation: Ohm’s Law states I = V ÷ R, allowing the inspector to calculate expected current for a given load. Question 3. What is the minimum working clearance required above a non-grounded (hot) conductor in a residential attic according to the NEC? A) 3 ft B) 6 ft C) 1 ft D) 2 ft
Inspector 1E Ultimate Exam
Answer: C Explanation: The NEC requires at least 1 ft of clearance above exposed live parts in attics to allow safe access and reduce shock risk. Question 4. When inspecting a splice in a Type NM cable, which of the following must be present? A) Soldered connections only B) Wire nuts or listed splice device with proper fill C) Electrical tape only D) Crimp connectors without a splice cover Answer: B Explanation: Splices must be made with listed devices (e.g., wire nuts) and must not exceed the fill capacity to maintain code compliance. Question 5. A 12-AWG copper conductor is used for a branch circuit. What is its maximum allowable ampacity for a 60 °C termination in a residential dwelling? A) 15 A B) 20 A C) 25 A D) 30 A Answer: B Explanation: According to NEC Table 310.15(B)(16), 12-AWG copper is rated for 20 A at 60 °C, which is the typical rating for residential branch circuits. Question 6. The service entrance conductor for a 200 A residential service must be at least which size of copper? A) 2/0 AWG
Inspector 1E Ultimate Exam
Question 9. When performing a load calculation for a dwelling, the NEC requires the kitchen countertop receptacle load to be calculated at which value per linear foot? A) 1 VA/ft B) 2 VA/ft C) 3 VA/ft D) 4 VA/ft Answer: B Explanation: NEC Table 220.52 requires a load of 2 VA per foot of countertop length for kitchen receptacle calculations. Question 10. Which device provides protection against both ground-fault and arc-fault conditions in a single unit? A) GFCI breaker only B) AFCI breaker only C) Dual-function (GF-AFCI) breaker D) Standard circuit breaker with surge protector Answer: C Explanation: A dual-function GF-AFCI breaker combines ground-fault and arc-fault protection in one device. Question 11. According to the NEC, how many 20-amp small-appliance circuits are required in a standard kitchen? A) One B) Two C) Three D) Four
Inspector 1E Ultimate Exam
Answer: B Explanation: NEC 210.11(C)(1) mandates at least two 20-amp small-appliance branch circuits for countertop receptacles in a kitchen. Question 12. In a residential panelboard, which of the following is the correct method for identifying the main disconnect? A) Label “Main” on the circuit breaker only B) Use a separate main breaker or main lugs with a clear “Main” designation C) Color-code the main breaker red D) Place a “Service” sticker on the panel door Answer: B Explanation: The main disconnect must be a listed main breaker or main lugs with a clear identification as “Main” per NEC 240.87. Question 13. Which of the following is the proper support spacing for NM-B (Romex) cable in residential wiring? A) Every 3 ft and within 12 in of boxes B) Every 4 ft and within 8 in of boxes C) Every 6 ft and within 6 in of boxes D) Every 8 ft and within 4 in of boxes Answer: B Explanation: NEC 334.30 requires NM cable to be supported at intervals not exceeding 4 ft and within 8 in of each outlet, device, or junction box. Question 14. A bathroom requires a GFCI receptacle. Which of the following also must be GFCI-protected in that same bathroom? A) The ceiling fan
Inspector 1E Ultimate Exam
Question 17. When installing a receptacle in a wet location outdoors, which of the following must be true? A) The receptacle must be GFCI-protected and have a weather-proof cover with the device inserted B) Only a GFCI breaker is required, cover may be non-weather-proof C) The receptacle can be standard if it is placed under a shelter D) A regular receptacle with an outdoor-rated cord is acceptable Answer: A Explanation: NEC 406.9(A) requires outdoor receptacles in wet locations to be GFCI-protected and installed with a weather-proof (in-use) cover. Question 18. Which of the following statements about equipment grounding conductors (EGC) is correct? A) The EGC can be smaller than the circuit’s ungrounded conductor B) The EGC must be the same size as the neutral conductor C) The EGC size is determined by Table 250.122 based on overcurrent device rating D) The EGC can be omitted if the circuit uses a GFCI device Answer: C Explanation: NEC Table 250.122 specifies the minimum size of the EGC based on the rating of the overcurrent protective device. Question 19. A flexible cord is being used to power a portable air conditioner. Which of the following is the correct ampacity for a 14-AWG, 3 - wire flexible cord? A) 10 A B) 13 A C) 15 A
Inspector 1E Ultimate Exam
D) 18 A
Answer: B Explanation: NEC Table 400.5(A)(1) lists 14-AWG 3-wire flexible cord with a maximum of 13 A for typical use. Question 20. Class 2 circuits are limited to a maximum voltage of: A) 30 V B) 50 V C) 120 V D) 150 V Answer: B Explanation: NEC 725 defines Class 2 circuits as limited to 30 V rms or 60 V dc; however, the maximum permissible voltage for Class 2 circuits is 50 V for low-voltage power limited circuits. Question 21. Which of the following devices must be installed at a minimum of 18 in above the finished floor in a residential kitchen? A) Wall switch controlling a range hood B) Countertop receptacle C) Under-cabinet lighting switch D) Light fixture on the ceiling Answer: C Explanation: NEC 404.8 requires switches controlling lighting to be installed at a maximum of 48 in above the floor; however, under-cabinet switches are typically installed at or above 18 in for accessibility. Question 22. A receptacle is to be installed in a hallway that is 10 ft long. According to NEC spacing rules, how many receptacles are required?
Inspector 1E Ultimate Exam
Answer: A Explanation: NEC 250.32(A) requires a separate grounding electrode system at a detached structure, bonded to the feeder’s grounding conductor. Question 25. A homeowner installs a new electric range. What is the required minimum size of the disconnecting means for this appliance? A) 15 A circuit breaker B) 20 A circuit breaker C) 30 A circuit breaker D) 40 A circuit breaker Answer: C Explanation: Most residential electric ranges are required to have a dedicated 30 A branch circuit per NEC 210.23(A)(2). Question 26. Which of the following is the correct minimum height for a receptacle installed in a bathroom vanity area? A) 12 in above the floor B) 15 in above the floor C) 18 in above the floor D) 24 in above the floor Answer: C Explanation: NEC 210.52(D) requires bathroom vanity receptacles to be installed not less than 18 in above the finished floor. Question 27. When a circuit includes a GFCI breaker at the panel, which of the following additional locations still requires GFCI protection? A) Outdoor receptacles B) Basement wet-location receptacles
Inspector 1E Ultimate Exam
C) Kitchen countertop receptacles D) All of the above Answer: D Explanation: NEC 210.8 requires GFCI protection at each listed location regardless of where the protection device is installed. Question 28. A residential HVAC unit requires a disconnect. What is the minimum distance the disconnect must be installed from the equipment? A) 3 ft B) 6 ft C) 8 ft D) 10 ft Answer: B Explanation: NEC 440.14 requires a disconnecting means to be installed within sight of the HVAC equipment and not more than 6 ft away. Question 29. Which of the following is the correct method for sizing a feeder to a subpanel that supplies a 20 % load of 30 kVA? A) Use 4 AWG copper B) Use 2 AWG copper C) Use 1/0 AWG aluminum D) Use 3/0 AWG copper Answer: B Explanation: 20 % of 30 kVA = 6 kVA. At 240 V, current = 25 A. A 2 AWG copper conductor (rated 115 A) is more than sufficient; however, the smallest standard size that meets the ampacity is 8 AWG (40 A). Since 8 AWG is not listed, the correct answer is B (2 AWG) as the next standard size meeting the requirement.
Inspector 1E Ultimate Exam
C) 10 AWG copper D) 8 AWG copper Answer: C Explanation: The overcurrent device for a 1½ hp motor is typically 20 A; per Table 250.122, a 10 AWG copper EGC is required for a 20 A circuit. Question 33. Which of the following is NOT a permitted method for bonding a metal conduit system? A) Using a bonding jumper to the grounding electrode system B) Relying on the conduit’s continuity alone when it is continuous C) Using a listed bonding screw and washer at each connection D) Installing a separate grounding conductor inside the conduit at each box Answer: D Explanation: Installing a separate grounding conductor inside the conduit at each box is unnecessary; bonding is achieved through continuity, bonding jumpers, or listed fittings. Question 34. In a residential dwelling, which of the following areas requires a dedicated 20 A circuit for a laundry appliance? A) A washing machine only B) A dryer only C) Both washing machine and dryer together D) Neither; they share a general circuit Answer: A Explanation: NEC 210.11(C)(2) requires a dedicated 20 A circuit for a washing machine. The dryer requires a separate circuit per its rating.
Inspector 1E Ultimate Exam
Question 35. Which type of receptacle is required for a countertop in a kitchen that serves a sink? A) Tamper-resistant (TR) receptacle only B) GFCI-protected receptacle only C) Both TR and GFCI-protected receptacle D) Standard receptacle is acceptable Answer: C Explanation: NEC 210.8(A)(6) requires GFCI protection, and NEC 406. requires tamper-resistant receptacles in dwelling unit kitchens. Question 36. When using a metal raceway as the equipment grounding conductor, what must be done at each termination? A) Apply electrical tape over the end B) Install a listed grounding clamp or bonding device C) Solder the raceway to the device grounding terminal D) No special treatment is needed if the raceway is continuous Answer: B Explanation: NEC 250.118 requires a listed grounding clamp or bonding device at each termination of a raceway used as an EGC. Question 37. Which of the following is the correct minimum size for a grounding electrode conductor (GEC) that connects a 100 A service to a ground rod? A) 14 AWG copper B) 12 AWG copper C) 10 AWG copper D) 8 AWG copper
Inspector 1E Ultimate Exam
B) 1½ in C) 2 in D) 3 in Answer: B Explanation: NEC 300.5 requires a minimum of 1½ in cover for PVC conduit embedded in concrete. Question 41. Which of the following is the correct rating for a receptacle installed in a residential garage that supplies a portable electric heater? A) 15 A, non-GFCI B) 20 A, GFCI-protected C) 15 A, GFCI-protected D) 20 A, non-GFCI Answer: B Explanation: NEC 210.8(A)(2) mandates GFCI protection for garage receptacles, and a 20 A receptacle is appropriate for a heater load. Question 42. A flexible cord set is used to connect a ceiling fan to a junction box. Which of the following is the correct maximum length for the cord set? A) 3 ft B) 6 ft C) 12 ft D) No specific limit if rated for the load Answer: B Explanation: NEC 400.8(A) limits flexible cord sets to a maximum of 6 ft for suspended ceiling fan applications.
Inspector 1E Ultimate Exam
Question 43. In a residential dwelling, which of the following areas does NOT require GFCI protection? A) Outdoor kitchen countertop receptacles B) Interior hallway lighting switches C) Basement wet-location receptacles D) Laundry room receptacles Answer: B Explanation: GFCI protection is required for wet locations and outdoor/utility areas, but not for interior hallway lighting switches. Question 44. Which of the following is the correct minimum ampacity for a 10-AWG aluminum feeder supplying a 60 A subpanel? A) 30 A B) 40 A C) 55 A D) 65 A Answer: D Explanation: Per NEC Table 310.15(B)(16), 10-AWG aluminum at 60 °C is rated for 65 A, making it suitable for a 60 A feeder. Question 45. A residential kitchen has a countertop length of 12 ft. How many countertop receptacles are required by code? A) One B) Two C) Three D) Four
Inspector 1E Ultimate Exam
A) White or gray insulation, or a continuous white stripe on other colors B) All conductors must be bare copper C) Mark with a green tape D) Grounded conductors can be any color as long as they are documented Answer: A Explanation: NEC 200.6 requires grounded conductors to be identified by white, gray, or a continuous white stripe. Question 49. A 240 V, 30 A dryer requires a dedicated circuit. What type of receptacle must be installed? A) NEMA 5-15R B) NEMA 6-15R C) NEMA 6-20R D) NEMA 14-30R Answer: D Explanation: Residential electric dryers typically require a 4-wire, 30 A NEMA 14 - 30R receptacle per NEC 210.23(A)(2). Question 50. Which of the following is the correct minimum distance between a receptacle and a doorway in a residential hallway? A) 12 in from the doorway edge B) 24 in from the doorway edge C) No specific distance, only height matters D) Must be on the opposite wall from the doorway Answer: C Explanation: NEC does not prescribe a minimum distance from a doorway; the receptacle must meet height and spacing requirements only.
Inspector 1E Ultimate Exam
Question 51. When a metal conduit is used as the grounding conductor, how must the conduit be bonded at each junction box? A) By twisting the conduit ends together B) By using a listed conduit bonding device or fitting C) By applying silicone sealant D) No bonding is required if the conduit is continuous Answer: B Explanation: NEC 250.118 requires a listed bonding device at each connection where the conduit is used as an EGC. Question 52. Which of the following is the correct minimum size for a grounding electrode conductor that connects to a concrete-encased electrode (Ufer) for a 150 A service? A) 12 AWG copper B) 10 AWG copper C) 8 AWG copper D) 6 AWG copper Answer: C Explanation: Per Table 250.66, a 150 A service requires at least 8 AWG copper for the GEC. Question 53. A residential panelboard has a rating of 225 A. Which of the following statements is correct? A) The panel may supply a 200 A service without a main breaker B) The panel must be fed by a 250 A service conductor C) The panel cannot be used in a single-family dwelling D) The panel must have a main breaker rated at 225 A or less
