South Dakota Class B Electrician Exam (ICC 533, 2023 NEC) Practice Exam
Free Practice Exam
Test your knowledge with 10 questions from our pool of 20 free questions.
- 10 questions per attempt
- 30 minute time limit
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Full Practice Exam
Complete exam simulation matching the real Pearson VUE test format.
- 60 questions (same as real exam)
- 180 minute time limit
- 7 topic areas covered
- 262 questions in pool
- Detailed explanations
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South Dakota Class B Electrician (ICC 533, 2023 NEC) Practice Exam Guide
What's on the exam
Questions per topic, out of 60This practice exam is built around the official content outline for the South Dakota Class B Electrician (ICC 533, 2023 NEC) exam: General Knowledge and Plan Reading, Services and Service Equipment, Feeders, Branch Circuits and Conductors, Wiring Methods and Materials, Equipment and Devices, Special Occupancies, Equipment and Conditions.
There are two ways to practice. The free practice exam gives you 10 questions per attempt, and you can take it as many times as you like. The full practice exam gives you 60 questions on a 3 hours clock, with a new draw from our question bank each time.
General Knowledge and Plan Reading 7 items
Our study plan for this topic: Electrical Theory and General Electrical Load Calculations; Code Definitions and Terms; NEC Purpose, Scope, and Code Arrangement; Series, Parallel, and Combination Circuit Analysis; AC Circuit Properties: Impedance, Reactance, Inductance, and Capacitance; Power Factor, Apparent Power (kVA), and Power Factor Correction; Dwelling Unit Load Calculations (Lighting, Small-Appliance, Laundry, Cooking, and Dryer Loads); Feeder and Service Load Calculations with Demand Factors.
Services and Service Equipment 13 items
Our study plan for this topic: Service Load Calculations; Service Equipment & Service Conductors; System Grounding and Bonding; Service Disconnect Requirements and Ratings; Overcurrent Protection for Services; Grounding Electrode System and Electrode Types; Surge Protection Requirements for Services; Service Conductor Installation Methods and Clearances.
Feeders 8 items
Our study plan for this topic: Load Calculations; Equipment Grounding; Feeder conductor ampacity and minimum sizing (NEC 215.2); Overcurrent protection for feeders (NEC 215.3); Feeder disconnecting means for separate buildings and structures (NEC 225.31–225.39); Neutral conductor sizing for feeders (NEC 215.2(B), 220.61); Common neutral conductors and parallel feeder installations (NEC 215.4); Surge-protective device requirements for feeders supplying dwelling units (NEC 215.18, 225.42).
Branch Circuits and Conductors 15 items
Our study plan for this topic: Branch Circuit Calculations; Required Outlets & GFCI/AFCI Protection; Overcurrent Protection; Equipment Grounding; Conductors; Voltage Drop Calculations and Conductor Sizing; Conductor Ampacity Tables and Temperature Ratings; Ampacity Correction and Adjustment Factors.
Wiring Methods and Materials 8 items
Our study plan for this topic: Raceway Installations; Boxes and Enclosures; Flexible Cords and Cables; Cable Wiring Methods (NM, MC, SE, USE, UF) — Uses Permitted and Prohibited; Protection of Cables and Raceways Against Physical Damage; Conductor Fill and Conduit Sizing Calculations; Underground Installation Requirements and Minimum Cover Depths; Conduit Bending Techniques and Calculations.
Equipment and Devices 5 items
Our study plan for this topic: Luminaires; Receptacles, Switches and Other Devices; Appliances and Other Equipment; Luminaire location requirements (wet, damp, closets, bathtub/shower zones); Recessed luminaire installation (Type IC, clearances, thermal protection); Lighting track installation and construction requirements; Low-voltage lighting system requirements and voltage limitations; Switch ratings, types, and connection requirements.
Special Occupancies, Equipment and Conditions 4 items
Our study plan for this topic: Swimming Pools and Similar Installations; Low Voltage Circuits, Alarm & Similar Systems; Fire Alarm Circuit Types: Power-Limited (PLFA) vs. Non-Power-Limited (NPLFA); Fire Alarm Circuit Power Source Requirements and Branch Circuit Protection; Separation and Mixing Rules for Fire Alarm Conductors and Other Circuit Types; Fire Alarm Cable Types, Listings, and Application Requirements (FPLP, FPLR, FPL, NPLFP, etc.); Class 2 and Class 3 Power-Limited Circuit Wiring Methods and Power Source Requirements; Communications System Grounding, Bonding, and Primary Protector Requirements.
Sample 1 — Branch Circuits and Conductors
Question: A single-family dwelling with a 120/240-volt, single-phase service has a calculated load of 154 amps. Using 75°C rated copper THWN-2 conductors, what is the minimum service conductor size?
- A. 1 AWG
- B. 1/0 AWG
- C. 2/0 AWG
- D. 3/0 AWG
Correct Answer: B
Step 1: A 154 A calculated load needs a service rated at least 154 A; the next standard rating is 175 A (240.6(A)).
Step 2: For a one-family dwelling supplied by a 120/240-volt, single-phase service, the NEC permits service conductors with an ampacity of not less than 83% of the service rating (310.12(A); 310.15(B)(7) in the 2017 NEC): 175 A × 0.83 = 145.25 A.
Step 3: In the 75°C copper column of Table 310.16, 1 AWG = 130 A (too small) and 1/0 AWG = 150 A, so 1/0 AWG copper is the minimum. Table 310.12(A) likewise lists 1/0 AWG copper for a 175 A dwelling service.
2/0 AWG (175 A) is what you get by sizing for the full 154 A with Table 310.16 alone, without the dwelling allowance.
Reference: NEC 2023 Section 310.12(A) and Table 310.12(A) (2017 NEC: 310.15(B)(7)); Table 310.16; 240.6(A); NEC 2023 Table 310.12(A)
Sample 2 — Services and Service Equipment
Question: A 400 A service uses 600 kcmil copper service conductors. What is the minimum size of a copper grounding electrode conductor that runs only to a concrete-encased electrode?
- A. 2 AWG
- B. 4 AWG
- C. 3/0 AWG
- D. 1/0 AWG
Correct Answer: B
Table 250.66 would require a 1/0 AWG copper grounding electrode conductor for 600 kcmil copper service conductors, but 250.66(B) says a grounding electrode conductor (or bonding jumper) that runs only to a concrete-encased electrode is not required to be larger than 4 AWG copper. So the minimum size required here is 4 AWG copper.
Reference: NEC 2023 Section 250.66(B), Table 250.66
Sample 3 — Feeders
Question: What is the minimum rating of the feeder disconnecting means required for a detached structure serving as an accessory to a one-family dwelling?
- A. 60 amperes, 3-wire
- B. 30 amperes, 3-wire
- C. 125 amperes, 3-wire
- D. 100 amperes, 3-wire
Correct Answer: A
Per NEC 225.39(D), for all installations other than one-circuit, two-circuit, or one-family dwelling installations, the feeder or branch-circuit disconnecting means shall have a rating of not less than 60 amperes. A detached accessory structure (such as a workshop or garage) is not a one-family dwelling itself, so NEC 225.39(C) does not apply; 225.39(D) governs, requiring a minimum 60-ampere disconnect.
Reference: NEC 2023 Section 225.39(D)
Your first score is just a starting point. After every attempt, the results page shows how you did on each outline topic, so you can see what to work on next. Compare your score with the real exam's passing score, a minimum score of 70, and keep at it until you pass consistently.
- Start with the questions you know. Go through the whole exam once and bookmark anything you're unsure about. Our practice exams let you bookmark and come back.
- Circle back to your bookmarks on the second pass.
- Keep an eye on your pace. The real exam works out to about 3 minutes per question.
- Turn every miss into a lesson. After each attempt, look up each missed question's reference in your book and read the section.
| Questions | 60 questions |
| Time limit | 3 hours |
| Passing score | a minimum score of 70 |
| Books in the exam room | Open book |
| Exam fee | $115 |
- Results for exams taken electronically are available immediately after you finish the exam.
- A failed exam may be retaken after 30 days, and after a second failure there is a 90-day wait before each later attempt.
Source: South Dakota Contractor/Trades Examination Information Bulletin, PUBLISHED August 19, 2025. Check the bulletin before test day: fees and rules can change.