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Question 1. Under SPS 316, which document provides the state-specific amendments to the NEC for Wisconsin residential work? A) Wisconsin Administrative Code Chapter SPS 309 B) SPS 316 – Wisconsin Electrical Code C) SPS 305 – Licensure Regulations D) SPS 314 – Inspection Procedures Answer: B Explanation: SPS 316 is the Wisconsin Electrical Code that incorporates NEC amendments specific to the state. Question 2. A residential electrical apprentice in Wisconsin must work under the direct supervision of which of the following? A) Journeyman Electrician B) Master Electrician or Residential Master Electrician C) Licensed Plumber D) Certified HVAC Technician Answer: B Explanation: Wisconsin law requires apprentices to be directly supervised by a Master Electrician or Residential Master Electrician. Question 3. How often must a Wisconsin residential electrician renew their license according to SPS 305? A) Every 1 year B) Every 2 years C) Every 3 years D) Every 5 years Answer: C Explanation: SPS 305 mandates a 3-year renewal cycle for residential electrical licenses. Question 4. According to SPS 305, how many continuing education hours are required for renewal of a residential electrician license? A) 4 hours
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B) 8 hours C) 12 hours D) 16 hours Answer: B Explanation: Wisconsin requires 8 CE hours for residential electricians every renewal period. Question 5. Ohm’s Law states that voltage equals current multiplied by resistance. If a circuit has 5 A flowing through a 12 Ω resistor, what is the voltage? A) 10 V B) 17 V C) 60 V D) 120 V Answer: C Explanation: V = I × R = 5 A × 12 Ω = 60 V. Question 6. Using the power formula P = I × V, what is the power consumed by a device drawing 3 A at 120 V? A) 30 W B) 360 W C) 400 W D) 720 W Answer: B Explanation: P = 3 A × 120 V = 360 W. Question 7. In a series circuit with three resistors of 4 Ω, 6 Ω, and 10 Ω, what is the total resistance? A) 4 Ω B) 10 Ω C) 20 Ω D) 24 Ω
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A) Service B) Feeder C) Panelboard D) Sub-panel Answer: B Explanation: A feeder distributes power from the service equipment to branch circuits. Question 12. NEC Article 110 requires equipment to be identified. Which of the following is a valid method of identification? A) Color-coded tape only B) Permanent marking on the equipment C) Hand-written label on a nearby wall D) Temporary sticker on the conduit Answer: B Explanation: Permanent markings (stamped, etched, or embossed) satisfy identification requirements. Question 13. What is the minimum working space clearance in front of a residential panelboard according to NEC 110.26? A) 24 in wide, 30 in deep, 36 in high B) 30 in wide, 36 in deep, 48 in high C) 30 in wide, 30 in deep, 36 in high D) 36 in wide, 36 in deep, 48 in high Answer: C Explanation: NEC 110.26 requires a minimum of 30 in wide, 30 in deep, and 36 in high clearance. Question 14. Which color is used for grounding conductors in residential wiring? A) Black B) Red
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C) White D) Green or bare copper Answer: D Explanation: Grounding conductors are identified by green insulation or bare copper. Question 15. NM-R (Romex) cable is permitted for which of the following applications? A) Exposed runs in commercial offices B) Inside walls, ceilings, and floors of residential dwellings C) Direct burial in the ground D) Outdoor conduit runs Answer: B Explanation: NM-R is allowed for concealed residential wiring inside building cavities. Question 16. When installing NM-R cable, the maximum distance between staples for securing the cable is: A) 4 ft B) 6 ft C) 8 ft D) 12 ft Answer: B Explanation: NEC 334.30 permits NM cable to be secured at intervals not exceeding 6 ft. Question 17. Which of the following protects NM-R cable from physical damage when passing through a stud? A) PVC conduit B) Metal nail plate C) Flexible metal conduit D) No protection required
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Question 21. A dwelling’s general lighting load is calculated at 3 VA per square foot. A 1,800 ft² house therefore requires a minimum lighting load of: A) 3,600 VA B) 5,400 VA C) 6,000 VA D) 9,000 VA Answer: B Explanation: 1,800 ft² × 3 VA/ft² = 5,400 VA. Question 22. The required ampacity for a small-appliance branch circuit (SABC) in a kitchen is: A) 15 A B) 20 A C) 30 A D) 40 A Answer: B Explanation: NEC 210.11(C)(1) mandates 20-A circuits for kitchen countertop receptacles. Question 23. Which NEC article specifies that laundry circuits must be dedicated? A) 210.11(C)(2) B) 210.23(A)(1) C) 210.52(E)(1) D) 210.8(A)(7) Answer: A Explanation: NEC 210.11(C)(2) requires a dedicated 20-A circuit for laundry appliances. Question 24. According to NEC 240.4, what is the standard breaker size for protecting a 12-AWG copper branch circuit? A) 15 A
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B) 20 A
C) 25 A
D) 30 A
Answer: B Explanation: 12-AWG copper is protected by a 20-A overcurrent device per NEC Table 310.16. Question 25. Which type of circuit breaker provides instantaneous tripping for short-circuit conditions? A) Thermal-magnetic B) Purely thermal C) Magnetic-only D) GFCI Answer: A Explanation: Thermal-magnetic breakers combine magnetic (instantaneous) and thermal (long-time) protection. Question 26. The “6/12 rule” for receptacle spacing in habitable rooms requires receptacles to be placed at intervals of no more than: A) 3 ft B) 6 ft C) 8 ft D) 12 ft Answer: B Explanation: NEC 210.52(A) mandates receptacles every 6 ft along walls. Question 27. In a kitchen, the countertop receptacle spacing must not exceed: A) 12 in from the countertop edge B) 24 in from the countertop edge C) 36 in from the countertop edge D) 48 in from the countertop edge
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Explanation: NEC 210.12(A) requires AFCI protection for all bedroom branch circuits. Question 31. Which device combines both GFCI and AFCI protection in a single breaker? A) Dual-function breaker B) Combination type “CAFCI” C) Arc-Fault Circuit Interrupter (AFCI) only D) Ground-Fault Circuit Interrupter (GFCI) only Answer: B Explanation: “Combination AFCI” (CAFCI) provides both arc-fault and ground-fault protection. Question 32. The most common type of grounding electrode used for a new residential foundation is: A) Ground rod only B) Concrete-encased electrode (Ufer) C) Metal water pipe only D) Grounding plate only Answer: B Explanation: A concrete-encased electrode (Ufer) is widely used and meets NEC grounding requirements. Question 33. What is the minimum size of a copper grounding electrode conductor (GEC) required for a 100-A service? A) #14 AWG B) #12 AWG C) #10 AWG D) #8 AWG Answer: C Explanation: NEC Table 250.66 specifies #10 AWG copper for a 100-A service.
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Question 34. The main bonding jumper (MBJ) connects the service neutral to which of the following? A) Grounding electrode conductor only B) Service equipment grounding bus only C) Both the grounding electrode conductor and equipment grounding bus D) No connection is required Answer: C Explanation: The MBJ bonds the neutral to the grounding electrode system and the equipment grounding bus. Question 35. Which of the following is the correct method to install a three-way switch controlling a hallway light? A) Use two single-pole switches and a neutral wire B) Use two three-way switches with a traveler between them C) Use a four-way switch only D) Use a dimmer switch at each location Answer: B Explanation: A three-way circuit uses two three-way switches with travelers connecting them. Question 36. Tamper-Resistant (TR) receptacles are required in which of the following locations? A) All residential dwelling units B) Only in kitchens and bathrooms C) Only in garages D) Only in outdoor locations Answer: A Explanation: NEC 406.12 requires TR receptacles in all areas of dwellings where children may be present. Question 37. Weather-Resistant (WR) receptacles must be used in which environment?
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C) 1926.1053(b)(1) D) 1910.140(c)(1) Answer: B Explanation: OSHA 1910.23(b)(2) mandates fall protection for ladders exceeding 6 ft. Question 41. The “Lockout/Tagout” (LOTO) procedure is primarily intended to protect workers from: A) Electrical shock only B) Mechanical injuries only C) Unexpected energization or start-up of equipment D) Chemical exposure Answer: C Explanation: LOTO ensures equipment is de-energized and cannot be re-energized while work is performed. Question 42. When using a multimeter to verify the absence of voltage on a de-energized circuit, which setting should be selected? A) Resistance (Ω) B) Continuity beep C) AC voltage (V) D) DC voltage (V) Answer: C Explanation: Selecting AC voltage allows the user to confirm that no voltage is present before proceeding. Question 43. The correct way to bend a 90-degree bend in EMT conduit is to: A) Use a hand bender only B) Use a hydraulic bender only C) Use a combination of a hand bender and a bender die set for 90° D) Heat the conduit and bend it manually Answer: C
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Explanation: A hand bender with the proper 90° die produces accurate bends in EMT. Question 44. Which of the following PPE is required when performing live-wire work in a residential setting? A) Hard hat only B) Safety glasses and insulated gloves C) Ear protection only D) Steel-toe boots only Answer: B Explanation: Safety glasses protect eyes; insulated gloves protect against shock when working on energized circuits. Question 45. According to NEC 210.52(G), how many receptacles are required in a garage that is 400 ft²? A) 2 B) 3 C) 4 D) 5 Answer: C Explanation: NEC requires one receptacle per 200 ft² of floor space; 400 ft² needs at least 2, but garages must have a minimum of 2 outlets, each on a separate branch circuit, effectively requiring 4 receptacles (2 per circuit). Question 46. Which conduit material is prohibited for use in wet locations unless it is listed for wet conditions? A) PVC B) Rigid metal conduit (RMC) C) EMT D) Flexible metal conduit (FMC) Answer: C Explanation: EMT is not suitable for wet locations unless specifically listed for such use.
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A) 240.
B) 430.
C) 440.
D) 440.
Answer: D Explanation: NEC 440.7 addresses disconnecting means for air-conditioning and refrigeration equipment. Question 51. The minimum size of a grounding electrode conductor (GEC) for a 150-A service with copper conductors is: A) #8 AWG B) #6 AWG C) #4 AWG D) #2 AWG Answer: B Explanation: NEC Table 250.66 indicates #6 AWG copper for a 150-A service. Question 52. Which of the following is a permissible method for grounding a metal conduit system? A) Using a separate grounding wire only B) Bonding the conduit to the grounding electrode system at each box C) No grounding required if the conduit is metal D) Only grounding the conduit at the service entrance Answer: B Explanation: Metal conduit must be bonded at each enclosure and at the service entrance to maintain continuity. Question 53. A residential electrician must verify that a circuit is de-energized before work. Which device provides the most reliable verification? A) Non-contact voltage tester B) Test lamp with a probe C) Multimeter set to AC voltage
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D) Clamp-on ammeter Answer: C Explanation: A calibrated multimeter set to AC voltage gives a definitive reading of voltage presence. Question 54. Under OSHA, which of the following is NOT considered a permissible type of personal protective equipment (PPE) for electrical work? A) Insulated rubber gloves rated for the voltage level B) Leather work gloves without insulation C) Flame-resistant (FR) clothing D) Safety glasses with side shields Answer: B Explanation: Leather gloves without insulation do not protect against electrical shock. Question 55. The NEC requires that a receptacle installed in a kitchen island must be GFCI protected. Which of the following satisfies this requirement? A) Installing a standard receptacle and a separate GFCI breaker for the island circuit B) Using a GFCI receptacle only on the island C) No GFCI required if the island is within 6 ft of a wall receptacle D) Using a GFCI breaker only for the entire kitchen circuit Answer: B Explanation: A GFCI receptacle on the island directly provides the required protection. Question 56. A residential dryer vent must be installed a minimum of how many feet from any opening into the building? A) 1 ft B) 3 ft C) 5 ft D) 10 ft Answer: C
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Question 60. Which of the following statements about the “derating” of conductors in a conduit is correct? A) Derating is never required for conduit fills below 40 % B) Conductors must be derated when more than three current-carrying conductors are in a raceway C) Derating only applies to aluminum conductors D) Derating is based on the length of the conduit run Answer: B Explanation: NEC Table 310.15(B)(3)(a) requires derating when more than three current-carrying conductors share a raceway. Question 61. For a 240-V, 30-A electric range, what is the minimum size of the equipment grounding conductor (EGC) required? A) #14 AWG copper B) #12 AWG copper C) #10 AWG copper D) #8 AWG copper Answer: C Explanation: NEC Table 250.122 specifies #10 AWG copper for a 30-A circuit. Question 62. Which of the following is true regarding the installation of a GFCI breaker in a residential panel? A) It must be installed on the main breaker only B) It can replace any standard single-pole breaker to protect downstream outlets C) It can only protect a single receptacle D) It does not require a neutral connection Answer: B Explanation: A GFCI breaker provides protection for all downstream loads on that circuit.
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Question 63. When performing a voltage test on a three-phase residential service, how many voltage readings are necessary to confirm proper phase relationships? A) One B) Two C) Three D) Four Answer: C Explanation: Three separate line-to-line voltage measurements verify phase balance and correct relationships. Question 64. The NEC requires that a receptacle outlet in a garage be GFCI protected if the garage is: A) Attached to a dwelling B) Detached from a dwelling C) Both attached and detached D) Only if the garage contains a vehicle Answer: C Explanation: NEC 210.8(A)(2) mandates GFCI protection for all garage receptacles, attached or detached. Question 65. A residential electrician must install a disconnecting means for a 240-V, 20-A electric water heater. What is the minimum rating of the disconnect? A) 15 A B) 20 A C) 25 A D) 30 A Answer: B Explanation: The disconnect must be rated at least equal to the overcurrent protection device, so 20 A.
