Missouri NASCLA Master Unlimited Electrical Contractor Highlighted & Tabbed Book Package

Missouri NASCLA Master Unlimited Electrical Contractor Highlighted & Tabbed Book Package

Prepare with the exact open-book references used for Missouri’s NASCLA-accredited Master/Unlimited Electrical Contractor examination—organized for faster lookups. This package is built for candidates who want to spend less time flipping pages and more time answering questions confidently under the clock.

Your books arrive highlighted and tabbed to support efficient code navigation and repeatable study drills. Because this is an open-book exam, speed and accuracy with your references—especially the NEC—can make a major difference in performance.

Exam Details

• Exam: NASCLA-accredited trade examination for Electrical Contractor (Master Electrician/Unlimited Electrician) (Missouri OSEC pathway)
• Exam provider: PSI Services LLC
• Exam fee: $125
• Number of questions: 100
• Time limit: 270 minutes
• Passing requirement: 75 correct answers
• Testing notes: A physical diagram/blueprint packet is handed out onsite at the testing center.
• Calculator: Silent, nonprinting, non-programmable calculator permitted.

Open Book Test

This examination is verified as an open book test. Only the approved references and editions are permitted in the exam room, so studying with the correct books matters just as much as knowing the content.

Licensing Steps

1. Request the application: Request an application and instructions from the Missouri Office of Statewide Electrical Contractors (OSEC).
2. Submit your application to OSEC: Missouri determines eligibility for licensure based on your application.
3. Receive approval to test: After approval, you’ll receive instructions to pay and schedule your exam with PSI.
4. Pay PSI and schedule: The exam fee is paid to PSI, and the exam is scheduled at a PSI testing center.
5. Take the NASCLA exam: Sit for the computer-based examination with your approved reference books.

State Requirements

• State agency: Missouri Division of Professional Registration – Office of Statewide Electrical Contractors (OSEC)
• Address: 3605 Missouri Boulevard, P.O. Box 1335, Jefferson City, MO 65102-1335
• Phone: (573) 522-3280
• Email: OSEC@pr.mo.gov
• Testing eligibility window: Once approved, eligibility is good for 2 years, and candidates may test unlimited times during that period.

Reference Books

The following references are included in this Highlighted & Tabbed Book Package and align to the approved reference list for the Missouri NASCLA Master/Unlimited Electrical exam.

• National Electrical Code (NEC), 2023
  The primary codebook for electrical installation requirements, wiring methods, protection, equipment rules, and special occupancies—core to most exam questions.
• Code of Federal Regulations – 29 CFR Part 1926 (OSHA), 2024
  OSHA construction safety standards commonly tested for jobsite compliance, hazard controls, and employer responsibilities.
• Code of Federal Regulations – 29 CFR 1910 (OSHA), 2024
  General industry OSHA standards used for workplace safety rules and broader compliance scenarios.
• A Guide to the Project Management Body of Knowledge (PMBOK® Guide), 2021 (7th Edition)
  Project management fundamentals supporting planning, execution, risk, quality, and professional project controls.
• ANSI/ASHRAE/IES 90.1-2022, Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings (I-P edition)
  Energy-efficiency requirements used for commercial building compliance concepts.
• NASCLA Contractors Guide to Business, Law and Project Management (Basic), 14th Ed., 2024
  Business, law, and project administration reference aligned with contractor responsibilities and management principles.
• NFPA 70E – Standard for Electrical Safety in the Workplace, 2024
  Electrical safety practices, including safe work conditions and hazard controls.
• Ugly’s Electrical References, 2023 Edition
  A fast reference for electrical calculations, formulas, tables, and common field lookups.
• Understanding Electrical Theory for NEC Applications
  Connects electrical theory to NEC-based problem solving to support calculations and code application questions.

Test Information and Study Materials

This exam is designed to measure practical competency across code application, safety, and electrical theory under timed conditions. For open-book testing, the key skill is not just knowing the answer—it’s knowing where the answer lives and how to locate it quickly.

• Build a “find it fast” routine: Practice locating Articles, Tables, and key definitions in the NEC until it becomes automatic.
• Train with timed sets: Work in short timed drills (10–20 questions) to build pace without sacrificing accuracy.
• Use your tabs intentionally: Tabs should support repeatable navigation (NEC structure, frequently used chapters, and common calculation areas).
• Plan/diagram awareness: Expect plan interpretation to show up through the testing center’s diagram/blueprint packet—practice translating drawings into code decisions.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep supports your Missouri NASCLA Master/Unlimited Electrical exam preparation with a trade-focused structure that emphasizes reference navigation, practical problem-solving, and confident pacing. You get organized study guidance that helps you prioritize the most test-relevant skills—NEC lookups, safety standards, electrical theory application, and exam-style question strategy—so your prep time is targeted and productive.

Our approach is built to help you practice the way the exam is actually taken: open-book, timed, and detail-driven—so you can build confidence through repetition and better decision-making under pressure.

FAQ

Is the Missouri NASCLA Master/Unlimited Electrical exam open book?

Yes. Missouri’s PSI Candidate Information Bulletin identifies this exam as an open book test, and only approved references/editions may be used in the exam room.

How many questions are on the exam, and how much time do I get?

The exam contains 100 questions, and you have 270 minutes to complete it.

What score do I need to pass?

You must answer 75 questions correctly to pass.

Who do I apply with first—Missouri or PSI?

You apply with the Missouri Office of Statewide Electrical Contractors (OSEC) first. After OSEC approves you, you pay PSI and schedule your exam.

How long is my approval to test valid?

Once approved, your testing eligibility is valid for 2 years, and you may test unlimited times during that period.

What does “Highlighted & Tabbed” mean for this package?

Your included references are prepared to help you navigate faster—supporting efficient lookups during practice and reinforcing an open-book test strategy focused on speed and accuracy.

Do testing centers provide any materials during the exam?

Yes. The testing center provides a physical diagram/blueprint packet onsite for the examination.