Maryland Master Electrician Exam: Complete 2026 Study Guide
You've put in the years. Seven of them, minimum, working under a licensed master. Now the Maryland Master Electrician exam stands between you and the credential that proves it. This guide covers everything you need to know — the exam format, what topics to study, sample questions, and the best resources to get you across that 70% passing line.
Maryland Master Electrician Exam Overview
The exam is administered by PSI and consists of 90 scored questions worth 100 points total. You get 240 minutes (4 hours) to complete it. To pass, you need a minimum score of 70%, which works out to 63 correct answers out of 90.
Here's something that makes this exam different from a lot of others: it's open book. You can bring your NEC 2020 into the test center. That's both good news and a trap for the unprepared. If you can't find an answer fast, the clock will eat you alive. Knowing where things are in the code matters more than having everything memorized.
Your pass or fail result appears on screen immediately after you finish. No waiting around.
For full exam details and to register, visit the official exam bulletin.
Exam Topics: What Gets Tested and How Much
The 90 questions are distributed across eight topic areas. Here's how the weight breaks down — study accordingly.
Calculations — 30 questions (your biggest priority)
This is a third of the entire exam. You'll work through branch-circuit and feeder load calculations for dwelling units, service load calculations with demand factors for multifamily and commercial occupancies, motor conductor sizing for single and multiple motors, and motor overload protection sizing. These questions require you to actually work problems, not just recognize a definition.
Wiring and Protection — 14 questions
Covers NEC Articles 100 through 230, including definitions, general installation requirements, branch circuits, feeders, outside wiring, and services. Know your grounding and overcurrent protection rules cold.
Wiring Methods and Materials — 13 questions
NEC Articles 300 through 374. This range covers general wiring methods, conductor selection, boxes, cable types, and raceway systems. You need to know ampacity adjustment rules and cable installation requirements.
Electrical Theory — 10 questions
Ohm's Law, basic circuit theory, troubleshooting principles, and equipment fundamentals. Some of this you can solve on the fly; some requires formula recall.
Equipment for General Use — 9 questions
Articles 400 through 490 — flexible cords, appliances, HVAC equipment, motors, transformers. Broad range, so skim for the big concepts in each article.
Special Occupancies — 8 questions
Articles 500 through 590 cover hazardous locations, health care facilities, mobile homes, recreational vehicles, and temporary installations.
Special Equipment — 4 questions
Articles 600 through 695, including signs, swimming pools, and fire pumps.
Special Communications — 2 questions
Articles 700 through 830. Lowest weight on the exam, but don't skip it entirely.
Master Electrician Exam Prep: Sample Questions
Here are five questions similar to what you'll face. Read them carefully — then think through them before checking your knowledge with a practice test. The answers are not given here.
Question 1 — Wiring and Protection (Easy)
Which of the following shall NOT be considered as an effective ground-fault current path?
- A) Rigid metal conduit used as an equipment grounding conductor
- B) A copper equipment grounding conductor run with circuit conductors
- C) Electrical metallic tubing
- D) The earth
Question 2 — Special Equipment (Medium)
Bonding conductors for signs and outline lighting systems shall be copper and not smaller than what size?
- A) 12 AWG
- B) 14 AWG
- C) 18 AWG
- D) 16 AWG
Question 3 — Wiring Methods and Materials (Medium)
You are a master electrician designing a metal wireway installation for a large commercial switchboard interconnection. At what threshold does the number of current-carrying conductors at any cross section of a metal wireway trigger the application of ampacity adjustment factors?
- A) More than 3 current-carrying conductors
- B) More than 30 current-carrying conductors
- C) More than 40 current-carrying conductors
- D) More than 20 current-carrying conductors
Question 4 — Wiring Methods and Materials (Medium)
Type NM and NMC cable ampacity shall not exceed the ampacity of a conductor rated at which temperature?
- A) 90°C
- B) 60°C
- C) 105°C
- D) 75°C
Question 5 — Equipment for General Use (Hard)
Electric heating appliances employing resistance-type heating elements rated more than 48 amperes (other than household surface heating elements or commercial-type open-coil elements) must have their heating elements subdivided so that each subdivided load does not exceed 48 amperes and is protected at not more than what ampere rating?
- A) 50 amperes
- B) 80 amperes
- C) 60 amperes
- D) 100 amperes
Don't just guess — work through the code. When you're ready to test your knowledge, start with our free practice exam to see where you actually stand.
What Types of Questions to Expect
Our practice bank has 438 questions covering all eight exam topics. Here's a breakdown of what each area tests:
- Calculations: Expect to do real math. Load calculations for single-family and multifamily dwellings, demand factor applications, motor circuit conductor sizing using Table 310.12 and Table 430.52, and overload protection sizing. These problems take time — pace yourself.
- Electrical Theory: Ohm's Law applications, series and parallel circuits, power factor, troubleshooting sequences, and equipment identification. Some calculation crossover here.
- Wiring and Protection: Code lookup questions on grounding, bonding, branch-circuit sizing, feeder requirements, and service entrance rules. You need to find specific NEC articles fast.
- Wiring Methods and Materials: Cable types, raceway fill, conductor ampacity with correction and adjustment factors, box fill calculations, and installation requirements for specific wiring methods.
- Equipment for General Use: Motor circuit design, transformer sizing, HVAC equipment rules, appliance installation requirements, and flexible cord applications.
- Special Occupancies: Hazardous location classifications, health care facility wiring rules, RV park requirements, and temporary power installation rules.
- Special Equipment: Sign wiring, pool and spa bonding and grounding, and fire pump controller requirements.
- Special Communications: Emergency systems, legally required standby systems, and low-voltage wiring rules from Articles 720 through 830.
Remember: when deciding where to spend your study time, follow the real exam weights — not the practice question counts. Calculations is the biggest target.
Required Study Materials
This exam is open book, which means one reference book matters more than anything else:
NEC 2020 — National Electrical Code
Maryland requires the 2020 edition specifically. You must bring your own copy to the test center — it will not be provided. Get the spiral-bound or tabbed version if you can. Tabs by article are worth every cent; you will flip through this book constantly during the exam.
You can index it and highlight or underline text. You cannot write notes in the margins and cannot bring loose or attached additional papers. A study guide is not allowed in the test center — so anything you want to reference must live inside the NEC itself.
For more on eligibility, application steps, and the Candidate Information Bulletin, check the state licensing website.
Study Tips for the Maryland Master Electrician Exam
Give yourself three to six weeks. Use the Candidate Information Bulletin from the exam registration page as your roadmap. It tells you exactly what's tested.
Build speed in the NEC, not memory. You can look things up. What you can't do is spend four minutes finding every answer. Practice running down articles and tables until it's automatic.
Aim for 80% on practice exams. The cut score is 70%, but setting your practice bar higher gives you room to breathe on test day. Run three clean passes at 80% or above before you schedule.
Work every question once, then go back. Answer what you know first. Flag what you're unsure about and come back. Don't sink five minutes into one question while twenty others sit unanswered.
Acknowledge nerves, then move past them. A little anxiety is normal — it means you care. If you feel yourself spiraling on a tough question, take a few slow breaths and reset. If the test center allows a short break, use it. Just remember the clock keeps running.
You're Ready — Now Start Practicing
The Maryland Master Electrician credential is earned. Seven years of work, a $65 exam fee, and 90 questions stand between you and it. The open-book format rewards preparation and speed — not cramming.
Start with our free practice exam to get a feel for the question style and see where your gaps are. When you're serious about prep, the full practice exam matches the real exam format with the same question count, same time limit, and a detailed score breakdown by topic so you know exactly where to focus.
Get your NEC 2020 tabbed and ready. Then put in the reps. You've done the hard part — seven years of it.