Mississippi - NASCLA ACCREDITED TRADE EXAMINATION FOR ELECTRICAL CONTRACTORS 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
- Unlimited attempts
- A new mix each time
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Full Practice Exam
Complete exam simulation matching the real PSI test format.
- 100 questions (same as real exam)
- 270 minute time limit
- 9 topic areas covered
- 502 questions in pool
- Detailed explanations
Texts preferred · 9am–9pm Central
Mississippi - NASCLA ACCREDITED TRADE EXAMINATION FOR ELECTRICAL CONTRACTORS Practice Exam Guide
What's on the exam
Questions per topic, out of 100This practice exam follows the official content outline for the Mississippi - NASCLA ACCREDITED TRADE EXAMINATION FOR ELECTRICAL CONTRACTORS exam: Project Design & Management, Safety, Electrical Theory and Principles, General Code Requirements, Wiring and Protection, Wiring Methods & Materials, General Equipment Use, Special Occupancies, Special Equipment, and Special Conditions, Communication Systems.
You have two ways to practice. The free practice exam gives you 10 questions per attempt, and you can retake it as often as you like. The full practice exam gives you 100 questions on a 270 minutes clock, with a new draw from our question bank every attempt.
Project Design & Management 8 items
Our study plan for this topic: Electrical load calculations and service sizing; Blueprint and schematic reading for electrical systems; Project scheduling and sequencing of electrical work; Material takeoffs and quantity estimation; Electrical system design compliance with NEC requirements; Job cost estimating and bidding; Coordination with other trades and project stakeholders; Permit and inspection processes for electrical projects.
Safety 9 items
Our study plan for this topic: Personal protective equipment (PPE) requirements for electrical work; Lockout/tagout procedures for electrical energy control; Electrical hazard identification and arc flash safety; OSHA regulations applicable to electrical contractors; Safe work practices for energized and de-energized electrical systems; Ladder and scaffold safety for electrical installations; Confined space entry procedures; Fire prevention and extinguisher use on job sites.
Electrical Theory and Principles 11 items
Our study plan for this topic: Ohm's Law and voltage, current, resistance relationships; Series and parallel circuit analysis; Power and energy calculations (watts, kilowatts, horsepower conversions); AC vs DC fundamentals and waveform characteristics; Capacitance and inductance in AC circuits; Power factor and reactive power concepts; Electromagnetism and transformer principles; Three-phase power calculations and configurations.
General Code Requirements 17 items
Our study plan for this topic: NEC Article 90 purpose, scope, enforcement, and arrangement of the Code; Article 100 definitions used across the Code (accessible, readily accessible, approved, listed, labeled, bonding, grounded, etc.); 110.2-110.3 approval, listing, and use of equipment per instructions; 110.4-110.7 voltages, conductor material, insulation integrity; 110.9-110.10 interrupting rating and short-circuit current ratings; 110.11-110.13 deteriorating agents, workmanship, mounting and cooling of equipment; 110.14 electrical connections, terminal temperature ratings, and torque; 110.15-110.16 high-leg marking and arc-flash hazard warning labels.
Wiring and Protection 17 items
Our study plan for this topic: Grounding and bonding requirements for electrical systems; Overcurrent protection sizing and device selection; Branch circuit ratings and conductor ampacity; Ground fault circuit interrupter (GFCI) protection requirements; Arc fault circuit interrupter (AFCI) protection requirements; Surge protection device requirements; Conductor insulation types and wiring methods; Service entrance and feeder protection requirements.
Wiring Methods & Materials 16 items
Our study plan for this topic: Cable and conduit types and their permitted uses; Conduit fill calculations and conductor allowances; Installation requirements for NM, MC, and AC cable; Raceway installation and support requirements; Wiring methods in specific occupancies and environments; Conductor sizing, insulation types, and temperature ratings; Protection requirements for wiring methods (physical damage, wet locations); Boxes, fittings, and enclosure requirements for wiring systems.
General Equipment Use 13 items
Our study plan for this topic: Safe use and handling of electrical tools and equipment; Equipment ratings and selection for electrical applications; Grounding and bonding of electrical equipment; Overcurrent protection requirements for equipment; Equipment installation and mounting requirements; Disconnecting means for electrical equipment; Equipment listing and labeling requirements; Working clearances and access around electrical equipment.
Special Occupancies, Special Equipment, and Special Conditions 8 items
Our study plan for this topic: Hazardous locations classification (Class I, II, III; Divisions 1 and 2); Wiring methods and equipment permitted in hazardous locations; Health care facilities electrical requirements (hospitals, nursing homes); Places of assembly occupancy wiring requirements; Agricultural buildings and structures electrical installations; Electric signs, outline lighting, and associated wiring; Swimming pools, fountains, and similar installations; Temporary installations and construction site wiring requirements.
Communication Systems 1 item
Our study plan for this topic: Installation requirements for communication wiring and cables; Article 805 communications circuits (telephone and similar systems); Coaxial cable installation and grounding; Network-powered broadband communications systems; Optical fiber cables and raceways; Bonding and grounding of communication systems; Separation from power conductors; Communication circuit protectors and surge protection.
Sample 1 — General Code Requirements
Question: A worker stands in the working space between two 480-volt switchboards that face each other, and both have exposed live parts. What is the minimum depth of working space required?
- A. 3 ft
- B. 4 ft
- C. 5 ft
- D. 6 ft
Correct Answer: B
Exposed live parts on both sides of the working space = Condition 3. Table 110.26(A)(1), 151-600 volts nominal to ground, Condition 3 = 4 ft (1.2 m).
Reference: NEC 2023 Table 110.26(A)(1)
Sample 2 — Wiring and Protection
Question: What is the minimum vertical clearance of overhead service conductors above a roof surface?
- A. 2.6 m (8 ft 6 in.)
- B. 3.0 m (10 ft)
- C. 3.7 m (12 ft)
- D. 900 mm (3 ft)
Correct Answer: A
Per NEC 230.24(A), overhead service conductors shall have a vertical clearance of not less than 2.6 m (8 ft 6 in.) above the roof surface.
Reference: NEC 2023 Section 230.24(A)
Sample 3 — Wiring Methods & Materials
Question: When more than three current-carrying conductors are installed in a raceway, what adjustment factor applies for 7-9 conductors according to NEC requirements?
- A. 60 percent
- B. 70 percent
- C. 80 percent
- D. 85 percent
Correct Answer: B
Per NEC Table 310.15(C)(1), when 7-9 current-carrying conductors are installed in a raceway or cable, the ampacity adjustment factor is 70 percent of the values in the ampacity tables.
Reference: NEC 2023 Table 310.15(C)(1)
Treat your first attempt as a checkup, not a verdict. After every attempt, the results page breaks your score down by outline topic, so you can see which topics need work. Compare your score with the real exam's passing score, 75% correct, and keep practicing until you pass consistently.
- Answer what you know first. Go through every question once, answer the ones you know, and bookmark the rest. Our practice exams let you bookmark and come back.
- Come back to your bookmarks. Work them out on your second pass.
- Watch your pace. The real exam works out to about 2 minutes 42 seconds per question.
- Look up every miss. After each attempt, find each missed question's reference in your book and read the section.
| Questions | 100 questions |
| Time limit | 270 minutes |
| Passing score | 75% correct |
| Books in the exam room | Open book |
| Exam fee | The fee is $120 for one examination portion and $240 for two examination portions, charged for each registration whether first time or repeat. |
- Your score is given immediately on screen after the examination, with a performance summary if you pass or a diagnostic report if you do not.
- A failing candidate may retest an unlimited number of times during the 6-month eligibility period, after which reapplication with the Board is required.
Source: STATE OF MISSISSIPPI CONTRACTOR EXAMINATIONS CANDIDATE INFORMATION BULLETIN, Updated 1/29/2026. Check the bulletin before test day: fees and rules can change.